Grammarly Review: writing assistance, and the keylogging concerns, audit from launch to last update, question, What data does it collect and share, and with whom? (2026)

Core Functionality and 2026 Status

As of early 2026, Grammarly operates as a cloud-based AI communication assistant rather than a simple local spell-checker. The application processes text through remote servers to provide real-time feedback on grammar, clarity, tone, and delivery. It integrates across major platforms, including browser extensions, a desktop application for Windows and Mac, and mobile keyboards for iOS and Android. The service has expanded beyond error correction to include generative AI features, which draft and rewrite content using large language models (LLMs).

The Keylogging Question

Technically, Grammarly functions by capturing keystrokes and transmitting them to cloud servers for analysis. This architecture frequently leads to user concern regarding “keylogging.” yet, a distinction exists between functional data transmission and malicious surveillance.

Technical Reality: Grammarly transmits text only when the user actively engages with a supported text field. It is designed to disable itself automatically in fields marked as sensitive, such as password forms and credit card inputs.

Security researchers classify the application as a text processor, not malware. The data transmission is necessary for the AI to analyze context and provide suggestions. Unlike malicious keyloggers, the application does not record inputs system-wide or store data from unsupported fields.

Audit and Security Timeline (2009, 2026)

Since its launch in 2009, Grammarly has undergone significant scrutiny regarding its security posture. The following timeline highlights serious security events and certifications:

Data Collection and Sharing

Grammarly’s business model relies on subscription fees rather than ad revenue, and the company states it does not sell user data. yet, it shares data with specific third-party “sub-processors” required to run its infrastructure.

What is Collected:

• User Content: Text typed into the editor or supported fields.
• Usage Data: Interaction metrics, device information, and log data.
• Account Info: Email addresses and payment details (processed via secure payment gateways).

Third-Party Processors (Verified 2026):

• Amazon Web Services (AWS): Hosts the primary infrastructure and stores encrypted user data (AES-256 at rest).
• Microsoft Azure: Processes data for generative AI features. Grammarly asserts that data sent to Azure is de-identified and not used to train Microsoft’s models.

Grammarly remains the most accurate writing assistant on the market in 2026, yet it demands a high price: your complete trust. Unlike local spell-checkers, Grammarly is a cloud- architecture. Every sentence you type into a supported field is encrypted and transmitted to Grammarly’s servers (hosted on AWS) for processing. For 95% of users, this trade-off is acceptable for the polish it provides. For users handling trade secrets, HIPAA-compliant data, or classified intelligence, Grammarly is a security liability and should be restricted to non-sensitive devices.

The service has evolved into a heavy-duty AI suite. It no longer just fixes commas; it rewrites entire paragraphs for tone and clarity using Generative AI. While Grammarly explicitly states it does not sell user data, its business model relies on processing your text to improve its own algorithms. Unless you actively opt out, your writing patterns contribute to their aggregate models. If stomach the privacy and the steep monthly pricing for non-annual plans, it is the superior tool. If you require offline privacy, it is a non-starter.

Key Facts

What It Does Well (Verified)

Contextual Accuracy: In our 2026 tests, Grammarly consistently outperformed Microsoft Editor and Google Gemini in catching nuanced tone errors and passive voice misuse. It correctly identifies the difference between “resign” and “re-sign” based on sentence context, a failure point for basic spell-checkers.

Cross-Platform Integration: The “Grammarly for Windows/Mac” desktop application floats over almost any text field (Slack, Discord, Word, Outlook), removing the need to copy-paste text into a browser. This integration is technically impressive, even with the privacy.

Tone Detection: The AI accurately gauges the “emotional temperature” of an email before you send it, flagging aggressive phrasing that might cause workplace friction.

What Can Hurt Users (Red Flags)

The “Cloud Keylogger” Architecture: To function, Grammarly must act as a keystroke interceptor. While it is not a malicious keylogger, the method is identical: it records input and sends it to a remote server. If Grammarly’s API keys were ever compromised, or if a rogue employee bypassed internal controls, the chance for data exfiltration is massive.

Default Data Training: By default, Grammarly may use “anonymized” or “aggregated” text snippets to refine its AI models. While they claim to strip personal identifiers, the definition of “anonymized” in the age of AI inference is slippery. Users must manually navigate to Settings> Privacy to opt out of product improvement training.

No Offline Functionality: If you lose internet access, Grammarly stops working entirely. There is no local dictionary or cache for basic checking, making it useless for travel in low-connectivity zones.

Pricing and Subscription Traps

Grammarly uses a classic “anchor pricing” strategy to force users into annual commitments. The between monthly and annual plans is aggressive.

The Trap: The $12/month rate is prominently advertised, the checkout page defaults to a $144 lump-sum charge. Users frequently miss the “billed annually” fine print until the charge hits their card. also, the “Free” version has become increasingly nag-heavy, inserting yellow “premium suggestions” that blur the text, coercing users to upgrade to see what they did wrong.

Cancellation Difficulty: Cancellation is possible through the account dashboard, Grammarly employs “dark patterns” during the offboarding process, requiring 3-4 clicks through “Are you sure?” and “Look what you’ll lose” screens before the subscription is actually terminated.

Privacy and Data Collection Audit (2020, 2026)

We audited Grammarly’s privacy evolution from its 2020 expansion to its 2026 AI dominance. The company has shifted from a simple grammar tool to a data-hungry AI processor.

Data Sharing Network: Grammarly does not sell data to data brokers. yet, it shares data with “Trusted Service Providers.” As of 2026, this list includes:

• Amazon Web Services (AWS): For hosting and storage (US East region).
• Microsoft Azure / OpenAI: For processing specific Generative AI features.
• Zendesk/Salesforce: For customer support ticketing.

The “Superhuman” Consolidation: Following industry shifts in late 2025, Grammarly’s security reporting and bug bounty programs were consolidated under the “Superhuman” umbrella (reflecting a closer alignment or corporate restructuring with the productivity platform). This has led to a unified security front, paying out over $200, 000 in bounties to ethical hackers, it also means user data is part of a larger corporate ecosystem than before.

Government Requests: Grammarly publishes a transparency report. In the 2024-2025 period, they received limited government requests for user data. Their policy is to notify users of such requests unless legally gagged (e. g., by an NSL). They have historically challenged broad warrants.

Security History and Incidents (2020, 2026)

Grammarly has maintained a strong security record relative to its size, with no massive data breaches of user content publicly confirmed between 2020 and early 2026.

• 2025 SSO Vulnerability: A serious vulnerability in the Single Sign-On (SSO) flow was discovered by a researcher (bounty paid: $10, 500). It allowed chance account takeovers via a “trailing space” in the entity ID. Grammarly patched this before it was exploited in the wild.
• 2024 OAuth Exposure: A high-severity bug in the OAuth 2. 0 service was reported and fixed, which could have allowed unauthorized token generation.
• Certifications: The company holds SOC 2 (Type 2), ISO 27001, and the newer ISO 42001 certification for Responsible AI, verified as of January 2026.

Quick Verdict

Grammarly is the most accurate writing assistant available in 2026. It is also a massive data ingestion engine. For casual users and students, the utility outweighs the privacy cost. For enterprise users or those handling trade secrets, the default cloud-based processing presents a serious security surface. You must configure the “AI Training” opt-out immediately upon installation to prevent your writing from training their models.

What Data Does It Collect?

Grammarly operates on a cloud-processing model. This means the text you type does not stay on your device. It travels to Grammarly’s servers for analysis. The privacy policy explicitly states they collect “User Content.” This includes every word, sentence, and paragraph you type into a Grammarly-active text field. They also collect technical telemetry. This includes IP addresses, device type, and browser version.

The service distinguishes between “User Content” (your writing) and “Usage Data” (how you use the tool). While they claim not to sell your data to third-party advertisers, they use your writing to improve their own algorithms. As of 2026, the default setting for Free and Individual Pro accounts permits Grammarly to use your text to train their AI models. You must manually navigate to Account> Settings> Privacy to disable this.

The Keylogging Question

Technically, Grammarly behaves like a keylogger because it captures keystrokes. Yet it differs from malware in intent and execution. Malware captures everything hiddenly to steal credentials. Grammarly captures text openly to provide corrections. The software includes a “blocklist” method. It automatically disables itself in fields identified as sensitive. This includes credit card forms and password fields. You see the Grammarly logo disappear in these fields. If the logo remains visible, the tool is active and transmitting data.

Who Has Access? (Sharing and Sub-processors)

Your data is not sold. It is shared with infrastructure providers. Grammarly relies heavily on Amazon Web Services (AWS) for hosting and processing. This places your data physically on Amazon servers. Other verified sub-processors include Microsoft Azure and Google Cloud Platform for specific AI functionalities. Since Grammarly is a US-based company, your data is subject to US law. This includes the CLOUD Act. Federal authorities can request access to user data through subpoenas or warrants. Grammarly’s transparency reports indicate they comply with valid legal requests.

Context-Aware AI & Generative Drafting

As of early 2026, Grammarly has evolved from a passive error-checker into an active drafting engine. The core “Generative AI” feature (formerly GrammarlyGO) processes context beyond the sentence level. It identifies document types, distinguishing between a legal contract and a Slack message, to adjust its suggestions for tone and formality automatically. Verified testing shows the tool can generate full email drafts, summarize long threads, and rewrite text for specific emotional (e. g., “make it more empathetic”) directly within third-party applications like Gmail and Microsoft Word.

Enterprise Precision and “Knowledge Share”

For business users, the standout feature is Knowledge Share, which solves the problem of tribal knowledge. This system surfaces internal company definitions, acronyms, and key contacts in real-time as employees type. If a user types a proprietary project code, Grammarly displays a tooltip with the project’s definition and owner, reducing internal confusion.

The platform supports up to 50 distinct style guides for enterprise tenants, allowing different departments (e. g., Legal vs. Marketing) to enforce separate terminologies. “Snippets” allow teams to insert pre-approved, legally vetted blocks of text with a simple shortcut, ensuring consistency in customer support and sales communications.

Verified Performance Metrics

Internal and third-party audits from 2024 and 2025 quantify the tool’s impact on workflow efficiency. Data indicates that using Grammarly results in a 36% reduction in email errors and a 28% reduction in support ticket errors. In high-volume environments like CRM systems, users demonstrated a 40% increase in words-per-minute output due to reduced time spent on manual proofreading.

Security and Compliance Infrastructure

Addressing data privacy concerns, Grammarly maintains a security posture that exceeds standard consumer app requirements. It holds SOC 2 Type 2 attestation and certification for ISO 27001, 27017, and 27018. Crucially for healthcare and finance sectors, the platform is HIPAA-compliant and supports “Bring Your Own Key” (BYOK) encryption for enterprise clients, ensuring that Grammarly itself cannot decrypt user data at rest without the customer’s specific key.

Platform Ubiquity

The service operates as a functional overlay across more than 500, 000 applications and websites. Unlike competitors that frequently require users to copy-paste text into a separate editor, Grammarly integrates directly into text fields in browsers, desktop operating systems (macOS/Windows), and mobile keyboards. This integration extends to code editors like VS Code, where it checks comments and documentation without interfering with executable code.

The “Benevolent” Keylogger Risk

not use Grammarly without granting it permission to read your thoughts before you share them. Technically, the application functions as a cloud-based keylogger. Unlike a malicious virus that steals passwords for theft, Grammarly captures your keystrokes to process them on remote servers (AWS and Azure) for correction. While the intent is service delivery, the method creates a massive attack surface. If a hacker compromises your account or Grammarly’s transmission tunnels, they do not just get your password; they get every email, draft, and confidential document you typed while the tool was active.

The application attempts to automatically disable itself in sensitive fields like credit card forms or password boxes. Yet, this detection relies on website coding standards. If a bank or internal corporate dashboard uses non-standard code for a sensitive field, Grammarly may fail to recognize it. The tool then transmit that sensitive data to the cloud for “spell checking.”

AI Training on Your Intellectual Property

Grammarly’s business model relies on a continuous stream of user data to refine its algorithms. For free and individual Pro users, the default settings frequently permit the company to use your text to train its AI models. This creates a serious intellectual property risk. If you write a screenplay, proprietary code, or a legal strategy document, snippets of your work could technically be absorbed into the model’s logic.

While Grammarly explicitly states it does not sell user data, it uses “de-identified” text for product improvement. In 2026, “de-identified” is a fragile concept; sophisticated AI can frequently re-identify writing styles or specific factual contexts. Enterprise clients (Grammarly Business) have stricter data isolation, individual professionals paying for Pro are frequently unaware they are paying to train the product.

The “God Mode” Browser Permissions

To function, the Grammarly browser extension demands the highest possible permission level: “Read and change all your data on all websites you visit.” This is known in security circles as “God Mode.”

This permission allows the extension to inject code into any webpage. In a worst-case scenario, such as a supply chain attack where a malicious actor pushes a compromised update to the extension, the attacker would instantly possess the ability to manipulate banking transactions, read private social media messages, and scrape internal company portals for millions of users simultaneously. A 2026 report by Incogni flagged Grammarly alongside QuillBot as having “high privacy risk” due to this extensive reach combined with data collection practices.

Legal Scrutiny and Tracking Pixels

Recent legal challenges have exposed cracks in Grammarly’s privacy armor. In late 2025, the firm Bryson Harris Suciu & DeMay PLLC began investigating privacy lawsuits against Grammarly. The allegations center on the use of tracking pixels and cookies that may expose user data to third-party advertisers without adequate consent. This mirrors a wider trend of “wiretapping” litigation under laws like the California Invasion of Privacy Act (CIPA). The concern is that while Grammarly claims to isolate your text, the metadata and tracking technologies used on their marketing and landing pages may bleed user identity data to ad networks.

Data Sharing with Microsoft Azure

Grammarly’s generative AI features do not run solely on Grammarly’s proprietary metal. The company sends user prompts and context to Microsoft Azure OpenAI Service. While contracts prohibit Microsoft from using this data to train their base models (like GPT-4), your data still leaves Grammarly’s direct custody. This adds a third party to the chain of trust. If Azure suffers a configuration error or a specific breach, your generative AI drafts are.

The “Anchor Price” Strategy and the $360 Trap

As of early 2026, Grammarly utilizes a pricing structure that aggressively pushes users toward annual commitments through a massive between monthly and yearly rates. The standard “Pro” plan for individuals is listed at $30. 00 per month when billed monthly. This price point serves as a psychological “anchor,” designed to make the annual option appear as a rational financial decision rather than a significant upfront expense.

By selecting the annual plan, the cost drops to $12. 00 per month, billed as a single lump sum of $144. 00. While this represents a 60% discount, the trap lies in the monthly option’s exorbitant markup. A user who subscribes monthly for one year pay $360. 00, more than double the cost of the annual plan. This 150% premium for flexibility is one of the steepest “convenience fees” in the SaaS market, punishing users who cannot afford the upfront $144 charge or who only need the tool for a short-term project.

2026 Pricing Tiers and Hidden Costs

Grammarly has consolidated its previous “Premium” and “Business” tiers into a streamlined “Pro” system, the costs remain high compared to emerging AI competitors. is the verified pricing schedule for the current fiscal year.

The “Silent Renewal” method

The most frequent financial complaint against Grammarly involves its auto-renewal practices. When a user signs up for the annual plan to secure the $12/month rate, they authorize a recurring $144 charge. Grammarly’s terms of service allow them to process this renewal payment automatically without sending a pre-billing reminder email.

This practice catches thousands of users off guard every year. A customer who subscribed in January 2025 for a specific project may forget the service by January 2026. Without a “Your subscription is about to renew” notification, the indication of the renewal is frequently the transaction alert from their bank. By that moment, the transaction is complete, and the user is immediately subject to the company’s strict refund policy.

Refund Policy: The “No Refund” Wall

Grammarly maintains a rigid “no refund” policy for subscription renewals. The Terms of Service explicitly state that payments are non-refundable unless required by law (such as the “cooling-off” periods mandated in the European Union or UK).

For users in the United States, this frequently means that a request for a refund, even if sent minutes after the auto-renewal charge hits, be denied. Customer support representatives frequently cite the terms agreed to at checkout, offering to cancel future billing while refusing to return the $144 just processed. This policy is a significant revenue retention method, locking forgetful users into another year of service they may not intend to use.

The “Free Trial” Illusion

Unlike SaaS competitors that offer a standard 7-day or 14-day free trial for their premium tiers, Grammarly rarely offers a direct, no-strings-attached free trial of its Pro plan to individual users. Instead, the “Free” version acts as the trial. This is a “freemium” model where the upgrade route is gated behind an immediate payment wall.

Occasionally, Grammarly tests 7-day trials for its “Pro for Teams” or specific promotional campaigns, these almost always require upfront credit card entry. If the user does not manually cancel before the 7th day, the full annual fee is charged instantly. The absence of a transparent, card-less trial for the Pro tier forces users to gamble $30 (for one month) just to see if the advanced features like tone rewrite and plagiarism detection are actually useful for their specific workflow.

Enterprise and Team Pricing Opacity

For businesses, the “Pro for Teams” plan introduces per-seat complexity. While the advertised rate frequently hovers around $15 per user/month, the actual cost can vary based on volume. A serious trap for team administrators is the “true-up” cost. If an admin adds a new team member mid-pattern, Grammarly charges a pro-rated amount immediately. yet, removing a user does not result in a pro-rated refund; the seat remains paid for until the end of the contract term. This asymmetry ensures Grammarly captures maximum revenue from fluctuating team sizes.

Since 2020, Grammarly has undergone a massive architectural shift from a simple correction tool to a generative AI platform. This evolution has fundamentally changed its data appetite. As of 2026, the service operates under the umbrella of the Superhuman productivity suite, introducing new data sharing flows that users must understand.

The “Keylogger” Question: Technical Reality vs. Myth

Technically, Grammarly functions by capturing keystrokes in real-time and transmitting them to cloud servers for processing. This architecture mirrors the behavior of keylogging malware, which frequently causes alarm. yet, a security audit reveals a serious distinction in intent and execution:

• Selective Transmission: Unlike malware, Grammarly is designed to block itself in fields marked “sensitive” by developers (e. g., password fields, credit card forms). It does not record system-wide keystrokes, only text typed into active, supported text fields.
• Encryption: All text is transmitted using TLS 1. 2+ encryption and stored using AES-256.
• No Local Storage: The application does not store a local log of your keystrokes on your device, preventing physical recovery of typed data by bad actors.

Data Collection and AI Training (The 2026 Trap)

The most serious privacy concern for individual users in 2026 is the default AI training setting. For Free, Premium, and single-user Pro accounts, Grammarly defaults to “Opt-In” for Product Improvement.

This means your essays, emails, and reports are de-identified and used to train their AI models unless you manually intervene. Enterprise and Business accounts are excluded from this training by default.

Third-Party Sub-Processors and Sharing

Grammarly does not sell data to data brokers. yet, “selling” is distinct from “sharing for processing.” Your text is sent to third-party sub-processors to function. As of 2026, the primary sub-processors include:

• Microsoft Azure (OpenAI Service): Used to power generative AI features. Contracts prohibit Microsoft from using Grammarly user text to train their base models.
• Amazon Web Services (AWS): Hosts the core infrastructure and encrypted user data in US-based data centers.
• Anthropic: Listed as a sub-processor for specific AI capabilities within the expanded Superhuman suite.

Government Requests and Transparency

Grammarly publishes transparency reports detailing law enforcement requests. Between 2020 and 2025, the company has consistently challenged broad warrants. They notify users of data requests unless legally gagged. In 2024, they received zero requests for content that resulted in data disclosure, processing primarily non-content (metadata) subpoenas.

Retention and Deletion

If you delete your account, Grammarly commits to removing all personal data from its primary servers within 30 days. yet, text that was previously anonymized and fed into the AI training dataset cannot be “untrained.” This makes the initial opt-out setting serious for privacy-conscious users.

Security Posture and Incident History (2020, 2026)

Grammarly operates as a cloud- text processor, meaning your data must leave your device to be analyzed. This architecture creates a larger attack surface than local-only alternatives. Between 2020 and 2026, Grammarly maintained a clean record regarding massive database breaches (no mass exfiltration of user credentials or documents), yet it has faced high-severity vulnerability reports inherent to its browser-extension model.

The “Keylogging” Classification

Security researchers frequently classify Grammarly’s behavior as “functional keylogging.” Unlike malicious keyloggers that steal passwords for theft, Grammarly captures keystrokes to provide service. The distinction lies in data handling:

• Transmission: Text is sent to Grammarly servers over TLS 1. 2+ encrypted connections.
• Exclusions: The extension is programmed to deactivate automatically on fields tagged type="password" or sensitive attributes (e. g., credit card forms), though this relies on proper website coding.
• Storage: User text is processed in AWS (US East) and encrypted at rest using AES-256.

Verified Security Incidents (2020, 2026)

While no “mega-breach” occurred, serious vulnerabilities were identified and patched through their bug bounty program.

Bug Bounty and Offensive Security

Grammarly maintains an aggressive offensive security posture to mitigate the risks of its cloud architecture. They operate a public bug bounty program on HackerOne. As of early 2026, the program has resolved over 150 valid vulnerability reports and paid out more than $200, 000 to ethical hackers. The company notably increased payouts for “AI data leakage” scenarios, acknowledging the new risks introduced by Large Language Model (LLM) integration.

Compliance and Certifications

For enterprise users, Grammarly maintains verified attestations to prove data governance standards:

• SOC 2 Type 2: Verified (Report available upon request).
• ISO Certifications: ISO 27001 (Security Management), ISO 27017 (Cloud Security), and ISO 27018 (PII Protection).
• HIPAA: Compliant only for Grammarly Business Enterprise plans where a Business Associate Agreement (BAA) is signed. Free and Premium individual plans are not HIPAA compliant.

Grammarly’s architecture relies entirely on cloud-based processing, which dictates its performance profile: it is resource-intensive. Because every sentence is sent to remote servers for analysis, the service introduces inherent latency that local spell-checkers do not suffer from. While the company claimed a 91% reduction in “text input lag” in a February 2025 engineering update, user reports from late 2025 and early 2026 contradict this optimization in real-world scenarios.

Speed and Latency

The “input lag”, the delay between typing a character and seeing it appear, remains the most frequently reported performance defect. In 2026, this problem is most acute in browser-based editors like Google Docs and Microsoft Word Online. Independent benchmarks and user logs indicate that the browser extension can add approximately 90ms to 180ms of processing time per event on heavy pages.

A specific conflict identified in January 2026 causes the extension to stop functioning or freeze when multiple tabs are open in Google Docs. Users with documents exceeding 40 pages frequently report “agonizingly slow” editing speeds, where text may take 3, 7 seconds to appear after typing.

Resource Consumption (CPU & RAM)

Grammarly is not a lightweight background utility; it is a heavy application. On Windows 11 and macOS systems, the desktop application has been documented consuming over 2GB of RAM and spiking CPU usage above 25% during active checking. Reddit threads from February 2026 detail users experiencing overheating and loud fan noise on modern laptops (including Surface and MacBook Pro models) solely due to the Grammarly background process.

Uptime and Outages

Reliability is generally high, the service is not immune to significant downtime. Because Grammarly has no offline mode, any server outage renders the tool useless. Notable incidents in the 2025, 2026 period include:

• February 6, 2026: A 3-hour outage affecting “AI-powered Docs” and editor login functionality.
• April 22, 2025: A third-party API failure disrupted premium features like plagiarism detection for 45 minutes.
• March 15, 2025: A severe server overload caused a 2-hour blackout of real-time editing features globally.

Mobile Keyboard Performance

The mobile experience on iOS and Android lags behind the desktop version. Users consistently report that the Grammarly Keyboard is “sluggish” compared to native keyboards like Gboard or Apple’s default. A persistent problem in 2025 involved the keyboard failing to load suggestions or crashing when switching between apps. Battery drain is also a concern; while modern optimization keeps average daily drain to an extra 2-5%, verified reports exist of the app consuming 20% battery in under two hours during intensive writing sessions on older devices.

AI Accuracy and False Positives

The shift to Generative AI has introduced a new of reliability problems: hallucinations. While standard grammar checking is 75, 80% accurate, the “AI Detector” and stylistic rewrite tools are inconsistent. Tests in late 2025 showed the AI detector had a false positive rate of roughly 6% on human writing, which rises significantly for technical or niche content. Conversely, the tool frequently fails to catch AI-generated text if it has been lightly paraphrased, with detection rates dropping as low as 22% in adversarial tests.

Offline Capability

Strictly Zero. Grammarly requires a stable internet connection to function. There is no local database for basic spell-checking. If you lose Wi-Fi on a flight or train, the tool stops working immediately. This is a serious reliability failure for professionals who need to work in disconnected environments.

Grammarly provides a centralized dashboard for managing data privacy and feature behavior, though finding specific opt-out toggles requires navigating through multiple sub-menus. As of early 2026, the most serious controls for privacy-conscious users reside in the Security and Feature Customization tabs.

Generative AI and Feature Toggles

Users who do not wish to use generative AI features (which send prompts to LLMs) can disable them entirely. This prevents the “GrammarlyGO” or AI assistance button from appearing in text fields.

• Location: Account> Settings> Feature customization
• Action: Toggle “Generative AI features” to Off.
• Granularity: specifically disable “Strategic suggestions” or “Paragraph-level rewrites” while keeping basic grammar checking active.

Stopping AI Training (The “Product Improvement” Toggle)

By default, Grammarly may use your text to train its internal algorithms. This is the primary privacy concern for users. You must actively opt out if you do not want your writing used for their research.

• Location: Account> Security> Privacy
• Setting Name: “Product Improvement and Training”
• Action: Switch the toggle to Off.
• Verification: Grammarly states that disabling this prevents your data from being used to train their internal models. They also confirm that user data is never used to train third-party models (like Microsoft Azure OpenAI), regardless of this setting.

Blocklists: Preventing Data Collection in Sensitive Apps

To mitigate “keylogging” risks, explicitly block Grammarly from reading text in specific applications or websites. This is safer than relying on the app to auto-detect sensitive fields.

Enterprise and Admin Controls

For Business and Enterprise plans, administrators hold significantly more power over data flow. An admin can enforce a global Blocklist for the entire organization, preventing Grammarly from running on specific domains or applications (e. g., blocking it on internal-company-portal. com). Admins can also force-disable Generative AI features for all employees to comply with corporate AI policies.

Data Deletion and Export

Users can request a “Personal Data Report” from the Privacy tab to see what metadata Grammarly retains. yet, deleting specific writing history is binary: delete individual documents from the Grammarly Editor, to scrub all associated log data, you must delete the entire account via Account> Delete Account.

The Support Wall: Automation Over Interaction

For the vast majority of its 30 million daily users, Grammarly operates as a “silent service.” The company has systematically removed direct human access for individual subscribers. If you pay for Grammarly Premium (Pro) or use the free version, not call a phone number, and not initiate a live chat with a human agent. The “chat” button on their help center connects strictly to an automated bot designed to deflect inquiries into knowledge base articles.

Direct support is gated behind a tiered system. While Enterprise clients receive dedicated account managers and priority queues, individual professionals paying up to $144 annually are routed through the same slow-moving email ticket system as free users. Verified reports from 2024 and 2025 indicate that email response times frequently stretch between 24 and 48 hours, with initial replies frequently consisting of copy-pasted templates that fail to address specific billing nuances.

Support Channels Availability Audit

The “No Refund” Billing Trap

The most significant dispute vector for Grammarly users involves its strict auto-renewal policy. The Terms of Service explicitly state that “refunds are issued only if required by law.” This clause is weaponized against users who forget to cancel before the annual renewal date.

The Pattern: Users sign up for a trial or a one-year term. When the renewal date arrives, Grammarly charges the full annual fee (frequently $144) without sending a pre-charge reminder email, a practice that is legal in US states considered a “dark pattern” in user experience design. When users contact support immediately (frequently within minutes of the charge) to request a reversal, they receive a canned denial citing the Terms of Service.

Investigative Note: In 2025, multiple Better Business Bureau (BBB) complaints confirmed that Grammarly support frequently denies refunds even for same-day requests. Exceptions are rare and require aggressive escalation or filing a dispute with the payment processor (chargeback), which results in immediate account termination.

The “Deletion Loop” Privacy Failure

While Grammarly provides a clear “Delete Account” button in its settings, user audits from late 2024 and early 2025 exposed a functional failure in this process. Users attempting to delete their accounts reported entering a “verification loop.”

The process requires a six-digit code sent to email. When users enter the code to confirm deletion, the system frequently redirects them back to the main dashboard without deleting the account. This technical barrier forces users to contact the slow-moving email support to manually request data erasure, a process that can take days to verify. also, Grammarly’s privacy policy retains the right to keep “anonymized” data for legitimate business interests even after an account is ostensibly wiped, a clause that privacy-conscious users frequently find unacceptable.

Dispute Resolution Verdict

If you have a billing dispute with Grammarly, the odds are stacked against you. The company relies on the friction of its support system, no phone, no chat, slow email, to discourage users from pursuing small claims or refunds. For Enterprise clients, the experience is professional and responsive; for everyone else, it is an automated wall designed to protect revenue retention over user satisfaction.

The “Safe” Choice: LanguageTool

For users who prioritize data privacy over generative AI features, LanguageTool is the primary recommendation in 2026. Unlike Grammarly, which is a closed-source proprietary system, LanguageTool operates on an open-core model. It is headquartered in Germany and adheres strictly to GDPR (General Data Protection Regulation) standards, which are significantly more than US-based data laws.

Why it is safer: LanguageTool explicitly states that it does not store your text for AI training purposes. While the browser extension still transmits text to their servers for checking (unless you run a local server), the data is processed in RAM and deleted immediately after the check is complete. For enterprise users, they offer an on-premise solution that never leaves your internal network, something Grammarly does not offer to individual consumers.

Cost: It is also the value winner. As of 2026, the premium plan costs approximately $5. 00/month (billed annually), which is less than half the price of Grammarly Premium.

The “Power User” Choice: ProWritingAid

If you need deep stylistic analysis rather than just spell-checking, ProWritingAid outperforms Grammarly. It is designed for long-form writers, academics, and novelists. While Grammarly focuses on “correctness” and “clarity” for emails, ProWritingAid offers 25+ detailed reports on pacing, sticky sentences, and dialogue tags.

Privacy Stance: ProWritingAid has taken a firm “No AI Training” stance. Their 2026 policy confirms: “We never use your data or your writing to train our AI models.” This is a serious distinction for creative writers worried about their unique style being absorbed into a Large Language Model (LLM).

The “Offline” Choice: Hemingway Editor (Desktop)

To completely eliminate the risk of “keylogging” or cloud transmission, you must use software that processes data locally. The Hemingway Editor (Desktop App) is the only mainstream tool that functions 100% offline. It does not check for grammar errors as deeply as Grammarly, it fixes style and readability without a single byte of data leaving your machine.

2026 Alternatives Comparison

The table compares the top alternatives based on verified 2026 pricing and data handling practices.

Ecosystem Note: Microsoft Editor

For users already in the Microsoft 365 ecosystem, Microsoft Editor is the most convenient “free” alternative. It is built into Word and Outlook. yet, from a privacy perspective, it subjects your data to Microsoft’s global privacy statement. While Microsoft claims not to use commercial customer data to train foundation LLMs, consumer data handling is broader. It is a functional alternative, not necessarily a more private one.

Uninstalling the Grammarly extension or desktop application does not cancel your subscription. If you delete the software without cancelling the billing agreement, Grammarly continue to charge your card. You must follow the specific order: cancel the recurring payment, then delete the account to wipe your data.

Step 1: Cancel the Subscription (Stop the Charges)

not cancel a subscription from the mobile app if you purchased it via the website. You must use the platform where you originally signed up.

The “Pause” Trap: During the cancellation flow, Grammarly frequently offers to “pause” your subscription or switch to a cheaper plan. You must decline these offers to stop future billing completely.

Step 2: Delete the Account (Wipe the Data)

Once your subscription is cancelled and the billing pattern ends, your account reverts to “Free” status. Only then can you permanently delete the account and its associated data.

1. Log in to Grammarly. com (not the extension).
2. Go to Account> Profile.
3. Scroll to the very bottom to find the Delete Account link (frequently in red or small text).
4. Confirm your password.
5. Verification: Grammarly may send a 6-digit code to your email to verify the request. Enter this code to finalize deletion.

Warning: Deletion is permanent. It removes all saved documents, personal dictionary entries, and writing statistics. If you have a Premium subscription active, the “Delete Account” button may be grayed out or hidden until the paid term expires.

Step 3: Remove Software and Extensions

Deleting your account does not remove the software from your device. The extension may continue to run in a “logged out” state.

• Chrome/Edge/Brave: Right-click the Grammarly icon in the toolbar> Select Remove from [Browser].
• Safari: Open Finder> Applications> Grammarly for Safari> Drag to Trash.
• Windows: Settings> Apps> Installed Apps> Grammarly> Uninstall.
• macOS: Finder> Applications> Drag Grammarly Desktop to Trash> Empty Trash.

Step 4: GDPR and Data Subject Rights

For users in the EU, UK, or California, you have legal rights to demand a full data scrub. If not access your account to delete it, or if you suspect data remains:

• Email: Send a direct request to privacy@grammarly. com with the subject line “GDPR/CCPA Data Deletion Request.”
• Data Report: request a “Personal Data Report” from the Privacy tab in account settings before deletion to see exactly what they stored.

Bottom Line

Grammarly remains the market leader for a reason: its core grammar and style engine is unmatched in accuracy and cross-platform integration. For professionals who write daily, the $12/month (annual) cost is a justifiable productivity expense. Yet, this convenience comes with a privacy trade-off. You are feeding a cloud-based AI every keystroke you type in supported fields. If you require absolute privacy, local-only alternatives are safer. For the majority of users, Grammarly is a tool, provided you configure the privacy settings to block it from sensitive fields.

What This App Is

Grammarly is a cloud-based AI communication assistant that integrates into browsers, desktop operating systems, and mobile keyboards to correct grammar, tone, and style in real-time. As of 2026, it operates as a flagship product within the Superhuman Platform suite, following a corporate restructuring that positioned it alongside other productivity tools like Coda and Mail. It is not a spell-checker; it is a generative AI engine that processes your inputs on remote servers.

Quick Verdict

For casual users and students, Grammarly is the most polished writing tool available, it demands a high privacy price: it reads nearly everything you type. For professionals working with NDA-protected, medical, or highly sensitive intellectual property, the standard version is a security liability. Use it for emails and essays; disable it for trade secrets.

What It Does Well (Verified)

Grammarly remains the market leader for a reason: its error detection is superior to standard spell-checkers. In 2026 tests, its generative AI features (rewriting for tone/brevity) outperformed built-in browser tools. The “Contextual Awareness” engine correctly identifies nuanced errors that local dictionaries miss. Its cross-platform integration is direct, allowing users to carry their custom dictionary and writing style p

To verify Grammarly’s data handling claims, we analyzed network traffic generated by the Grammarly browser extension (v14. 1154. 0) and the Windows desktop application during a standard editing session. This audit determines exactly what data leaves your device, where it goes, and whether the “keylogger” accusations hold technical merit.

The “Keylogging” Verdict: Functional vs. Malicious

Technically, Grammarly functions as a remote keylogger. Unlike a local spellchecker (e. g., Microsoft Word 2013), Grammarly cannot process text on your device due to the size of its AI models. Consequently, every character you type in an active text field is encrypted and transmitted instantly to Grammarly’s cloud servers.

yet, our packet inspection reveals a serious distinction between Grammarly and malicious spyware:

• Transmission Trigger: Data is sent only when you stop typing for approximately 300-500 milliseconds or complete a sentence. It does not stream a continuous live feed of every single keypress in real-time, rather sends “text deltas” (changes to the document).
• Context Windows: The payload contains the sentence you are working on, plus preceding and succeeding context. It does not scrape your entire hard drive or unrelated browser tabs.
• Encryption: All outbound traffic uses TLS 1. 3 (an upgrade from the previously TLS 1. 2), making the data unreadable to ISPs or local network snoopers.

Packet Payload Breakdown

We intercepted JSON payloads sent to data. grammarly. com and capi. grammarly. com. A typical transmission includes the following verified data points:

Data Destinations and Third-Party Sharing

Your text does not stay within Grammarly’s proprietary servers alone. Our audit tracks data flows to two primary external infrastructure partners:

1. Amazon Web Services (AWS): The primary destination for all text processing. Servers are located in the US East (N. Virginia) region. This means non-US users should be aware their data crosses international borders.
2. Microsoft Azure OpenAI: When you use “Generative AI” features (rewriting, brainstorming), your text is handed off to Microsoft’s Azure OpenAI Service. Grammarly claims this data is “de-identified” before transfer, the content itself must be shared to generate a response.

The “Sensitive Field” Failure Mode

Grammarly claims to automatically disable itself in sensitive fields (passwords, credit card forms). Our testing shows this relies entirely on the website developer correctly tagging the HTML field as type="password" or having specific aria-label attributes.

Red Flag: If you type a password into a standard text field (common on poorly designed login pages or internal corporate tools), Grammarly capture and transmit that password to its servers. We observed Grammarly attempting to check grammar in a “Secret Answer” security question field because the site had not marked it as sensitive.

2020, 2026 Security Audit History

Grammarly has maintained a clean record regarding massive data breaches, its architecture requires high trust.

• 2026 Privacy Report: A privacy analysis flagged Grammarly’s browser extension for having “deep browser access,” noting it can read data on all visited websites. This is necessary for its function represents a significant attack surface if Grammarly were ever compromised.
• Certifications: As of 2026, Grammarly maintains SOC 2 (Type 2), ISO 27001, and HIPAA compliance (for Enterprise plans only). These audits verify that their internal security controls are active, they do not negate the fact that they possess your data.
• Bug Bounty: The company runs an active HackerOne program, paying researchers to find vulnerabilities before criminals do. This is a positive indicator of security maturity.

As of late 2025, Grammarly has fundamentally altered its corporate identity and data scope. Following the July 2025 acquisition of the email client Superhuman and the earlier purchase of the workspace tool Coda, the company rebranded as Superhuman Platform Inc. This consolidation shifts Grammarly from a passive writing utility to an active “AI productivity platform” that ingests email, documents, and workflows. The for data provenance and AI training are significant.

The “Superhuman” Data Consolidation

The integration of Superhuman (email) and Coda (docs) into the Grammarly ecosystem creates a massive aggregation of user data. While Grammarly previously analyzed text only during the editing phase, the new “Superhuman Suite” architecture allows AI agents to access and index data across your entire communication stack to perform tasks like “proactive drafting.”

Training Data & The Opt-Out Trap

Grammarly’s privacy policy (updated October 2025) confirms that the company uses user content to train its proprietary AI models. For individual users (Free, Premium, and Pro), this setting is frequently enabled by default under the label “Product Improvement and Training.”

Unless a user manually navigates to Account Settings> Security> Product Improvement and disables the toggle, their writing samples, including chance sensitive drafts, enter Grammarly’s internal training corpus. While this data is de-identified, it remains part of the model’s learning set. Enterprise and Business accounts are generally excluded from this training by default, creating a two-tier privacy standard where paying individual consumers “pay” with their data.

Weaponizing “Keylogging” for Authorship

In a direct response to AI detection concerns, Grammarly launched the Authorship feature (formerly “Track Your Work”). This feature repurposes the application’s text-processing architecture into a user-facing surveillance log. By recording specific keystroke timing and editing history, Grammarly creates a “provenance report” to prove a document was written by a human, not an LLM.

While useful for students accused of academic dishonesty, this feature validates the long-standing technical concern that Grammarly can log keystrokes at a granular level. The difference is that this data is surfaced to the user as a feature rather than remaining a backend process. Users must explicitly enable Authorship for a document, once active, the “keylogging” is no longer a theory, it is a documented product function.

Data Provenance Verdict

Grammarly maintains a strict “walled garden” for its Generative AI features via Azure OpenAI, ensuring your prompts do not leak into the public ChatGPT training set. Yet, the risk lies in Grammarly’s own models. With the Superhuman acquisition, the dataset available for internal training theoretically spans email and documents. Users who demand absolute data isolation must rigorously verify their “Product Improvement” settings are disabled immediately after any software update.

Grammarly ( part of the Superhuman Platform as of late 2025) maintains a pristine compliance portfolio on paper. It holds a SOC 2 Type 2 report, ISO 27001/27017/27018 certifications, and HIPAA compliance. yet, an audit of its vulnerability history reveals a “Reality Gap”, a between these static certificates and the, frequently messy reality of securing a cloud-based keystroke analyzer.

The “Trailing Space” Vulnerability (2025)

The most damning evidence of this gap occurred in early 2025. While Grammarly’s marketing touted “enterprise-grade” SSO (Single Sign-On), security researchers discovered a logic flaw that bypassed these expensive controls. By simply adding a trailing space to an organization’s entityId (e. g., "company-id " instead of "company-id"), an attacker could trick Grammarly’s backend.

This “space” character caused a priority conflict in the authentication logic. The result was catastrophic for affected enterprise setups: it could trigger a Denial of Service (DoS) for the entire organization or, in specific edge cases, allow an attacker to provision users into a fake organization they controlled. Grammarly paid a $10, 500 bounty for this finding, it show a serious risk: compliance audits do not catch logic bugs.

The OAuth “Pass-The-Token” Flaw (2023)

In October 2023, Salt Security Labs exposed another crack in the armor. They identified a vulnerability in Grammarly’s social login implementation (OAuth). The flaw allowed an attacker to insert a verified token from a different site into the Grammarly login flow. Because the system failed to verify the token’s origin properly, an attacker could chance hijack user accounts. This “Pass-The-Token” attack affected millions of users who relied on the convenience of “Sign in with Google/Facebook” rather than a dedicated password.

The Security Feature Paywall

Grammarly creates a deliberate security caste system. serious defense method are locked behind the “Enterprise” gate, leaving Pro and Free users with a standard, less configurable security posture. If you are a lawyer or journalist using the “Pro” plan, you do not have access to the same data sovereignty tools as a corporate seat.

Data Encryption and Residency

even with the vulnerabilities, the baseline infrastructure is strong. Grammarly uses TLS 1. 2+ for data in transit and AES-256 for data at rest. Data is hosted primarily in AWS (Amazon Web Services) data centers in the US East region. For European customers, this US-centric storage remains a point of friction regarding GDPR data sovereignty, although standard contractual clauses (SCCs) are in place.

Investigative Note: The transition to the “Superhuman Platform” in 2025/2026 has introduced new complexity. User data flows through a broader ecosystem that includes Coda (docs) and Superhuman (email). While this unifies productivity, it expands the attack surface. A vulnerability in the Coda integration could theoretically expose Grammarly writing data, a vector that did not exist prior to the merger.

The AI Processing Black Box

Grammarly uses Microsoft Azure OpenAI Service for its Large Language Model (LLM) features. The company explicitly states that customer data is de-identified before being sent to Azure, and Microsoft is contractually prohibited from using this data to train its base models. For Enterprise clients, Grammarly asserts that no customer data is used to train its global models. yet, “Pro” users opt-in to having their usage patterns refine the system, albeit in an aggregated, privacy-preserving manner.

Grammarly operates under a complex mesh of global regulations, primarily anchored in the United States yet legally extended to cover European and Californian jurisdictions. For users concerned about the “keylogging” architecture, where text is transmitted to the cloud for processing, these regulatory frameworks provide the only legal assurance that data is not misused. As of 2026, the company relies on legal transfer method rather than local data residency to satisfy European privacy laws.

GDPR and The “Schrems II” (2020, 2026)

Since the 2020 Schrems II ruling invalidated the Privacy Shield, Grammarly has faced the challenge of justifying data transfers from the EU to its servers in the United States (AWS US East and West). The company currently relies on the EU-U. S. Data Privacy Framework (DPF) and Standard Contractual Clauses (SCCs) to legalize this transfer. While legally compliant, this setup means European user data physically leaves the EU. Unlike enterprise competitors that offer “EU-only” data residency options, Grammarly confirms that user data remains stored on U. S. infrastructure. This distinction is important for government entities or strict-compliance industries in Europe that require data sovereignty.

The EU AI Act (2024, 2026)

With the full enforcement of the EU AI Act in 2026, Grammarly falls under specific transparency obligations for “General Purpose AI” (GPAI) and “Limited Risk” AI systems. The regulations mandate that users must be informed when they interact with AI-generated content. Consequently, Grammarly has implemented labeling for its generative features (GrammarlyGO). The company must also maintain detailed technical documentation and comply with copyright laws regarding the data used to train its Large Language Models (LLMs). Users in the EU have the right to receive explanations for AI-assisted decisions if those decisions significantly impact them, although Grammarly’s primary function as a writing aid generally avoids the “High Risk” classification that applies to automated hiring or credit scoring tools.

HIPAA and The Enterprise Paywall

A frequent compliance trap occurs in the healthcare sector. Grammarly is capable of HIPAA compliance, yet it restricts this protection to its most expensive tier. The company sign a Business Associate Agreement (BAA) only for Grammarly for Business Enterprise plans ( requiring a minimum seat count). Individual doctors, nurses, or small practice administrators using the Free, Premium, or standard Business plans are not covered by a BAA. Using the standard version of Grammarly to type patient notes or medical emails constitutes a HIPAA violation, as the data is processed on non-BAA-protected servers.

California Privacy Rights (CCPA/CPRA)

January 1, 2026, updated regulations under the California Privacy Rights Act (CPRA) introduced stricter rules for Automated Decision-Making Technology (ADMT). Grammarly allows California residents to opt out of the sale or sharing of personal data for cross-context behavioral advertising. The platform also provides method to limit the use of sensitive personal information, aligning with the 2026 requirement for risk assessments regarding AI profiling.

By early 2026, the primary alternative to cloud-based writing assistants like Grammarly is no longer a different cloud service, a Local Large Language Model (LLM) running directly on user hardware. This shift fundamentally alters the threat. While Grammarly relies on a “Trust Service” model (you trust them with your data), local LLMs operate on a “Zero Trust” model (your data never leaves your device).

The Cloud Threat Model: Grammarly

Grammarly’s architecture is cloud-native. To function, it must transmit your text to its servers (hosted primarily on AWS in the US East region). From a security perspective, this creates a continuous data egress channel.

The Transmission Risk: Unlike a traditional keylogger that steals passwords, Grammarly is a “functional keylogger”, it captures keystrokes to provide service. The threat here is not malicious intent by Grammarly, interception or subpoena. Your drafted emails, confidential memos, and slack messages exist in transit and temporarily at rest on third-party infrastructure.

The “Ensemble” Exposure: As of 2026, Grammarly uses an “ensemble” method, routing specific complex queries to third-party LLM partners (like OpenAI or Azure-hosted models). While contractually protected, this increases the attack surface: your data passes through Grammarly’s hands and chance their partners’ processing pipelines.

Verified Safeguards:

• Encryption: TLS 1. 2+ for transit, AES-256 for data at rest.
• Certifications: SOC 2 Type 2, ISO 27001, and the newer ISO 42001 (AI Management System) certification verified in 2025.
• Enterprise Isolation: Business customers get logical tenant isolation, meaning their data is segregated from the general consumer pool used for training.

The Edge Threat Model: Local LLMs (Ollama, LM Studio)

Running a model like Llama 4 or Mistral locally (via tools like Ollama or LM Studio) keeps all processing on your device’s NPU/GPU.

The Supply Chain Risk: The primary threat to local LLMs is the model supply chain. Users frequently download “quantized” (compressed) models from repositories like Hugging Face. In 2025, security researchers demonstrated that malicious model weights could execute code upon loading. If you download a compromised model file, you bypass the “safe” cloud introduce a “Trojan horse” to your local machine.

The “Guardrail” Gap: Local models frequently absence the safety filters of Grammarly. While this offers “uncensored” writing, it also removes protections against generating harmful content or hallucinating facts without a fact-checking.

serious Comparison: Data Sovereignty & Risk

Verdict: Who is Safer?

For the Average User: Grammarly is safer. The risk of downloading a malware-infected model file from an open repository is higher than the risk of Grammarly mishandling data, given their massive investment in SOC 2 and ISO compliance.

For High-Threat: Local LLMs are mandatory. Journalists, whistleblowers, or developers working on IP-sensitive code should not use Grammarly. The theoretical risk of a cloud subpoena or a “man-in-the-middle” attack, yet small, is unacceptable for this demographic. A local LLM running on an air-gapped machine remains the gold standard for absolute privacy in 2026.

Audit Methodology and Verification Standards

Our investigative review of Grammarly (v. 2026) relies on a three-tier verification process designed to separate marketing claims from technical reality. Unlike standard aggregators that repurpose press releases, the Ekalavya Hansaj News Network conducts direct analysis of legal frameworks, network traffic, and security certifications. For this 2026 audit, we examined the application’s transition into the “Superhuman Platform” ecosystem and scrutinized its AI processing pipelines.

Tier 1: Legal and Policy Forensics
We extracted and diffed the Terms of Service and Privacy Policy documents from October 2025 against versions from 2023. This analysis focused on the “User Content” license grants, specifically looking for clauses that would permit the training of proprietary models on user text. We also verified the corporate restructuring that placed Grammarly under the “Superhuman Platform” umbrella, alongside Coda and Superhuman Mail.

Tier 2: Technical Traffic Analysis
To address the persistent “keylogging” allegations, our security researchers monitored the application’s network requests using packet capture tools during active use. We traffic sent to data. grammarly. com and auth. grammarly. com to verify that payload transmission occurs only upon specific user triggers (such as pausing typing or clicking “Check”) and that fields tagged type="password" or sensitive in the DOM remain strictly local.

Tier 3: Third-Party Attestation
We cross-referenced Grammarly’s self-reported security posture against public registries for ISO and SOC compliance. This included verifying the validity of the ISO 42001: 2023 certification (AI Management System) obtained in April 2025, which sets a new baseline for responsible AI deployment.

Verified Documentation Log (2020, 2026)

The following table details the specific primary source documents used to substantiate the findings in this review. These documents represent the legal and technical state of Grammarly as of early 2026.

Annotated Bibliography and Sources

The following sources provided the factual basis for our assessment of Grammarly’s pricing, security, and functionality.

1. Corporate Structure and Privacy Framework

Source: Grammarly Inc. / Superhuman Platform Privacy Policy (Oct 2025).
Relevance: This document serves as the primary evidence for the data collection limits. It explicitly states that Grammarly does not sell user data. It also introduces the “Superhuman Platform” entity, which encompasses Grammarly, Coda, and Superhuman Mail. This consolidation is serious for users to understand, as data governance policies apply across this broader suite of tools. The policy also delineates the “sandbox” environment for enterprise customers, preventing their data from interacting with the general training pool.

2. AI Safety and Compliance Certifications

Source: ISO/IEC 42001: 2023 Certification Announcement (April 2025).
Relevance: This certification is a key differentiator in 2026. While AI wrappers absence formal governance, Grammarly’s adherence to ISO 42001 proves they have established a management system specifically for AI risks. This counters the “black box” narrative frequently associated with LLM-based writing assistants.

Source: SOC 2 Type II Attestation (Ernst & Young, 2025).
Relevance: Unlike a Type I report which is a snapshot in time, the Type II report verifies that security controls functioned over a sustained period ( 12 months). This audit covers the “Security, Availability, and Confidentiality” trust principles, providing assurance that the cloud infrastructure is not a porous container for user text.

3. Vulnerability Management and Bug Bounties

Source: HackerOne: Superhuman (formerly Grammarly) Bug Bounty Program.
Relevance: The activity log on HackerOne confirms that Grammarly maintains an aggressive stance on external security research. The program offers significant bounties (up to $100, 000 for serious problem) and shows a response time averaging under 12 hours. This transparency indicates a mature security culture that invites scrutiny rather than suppressing it. The rebrand to “Superhuman” on this platform was a primary indicator of the corporate restructuring mentioned in our review.

4. Data Processing and Sub-processors

Source: Grammarly Trust Center: Sub-processor List (2026).
Relevance: This list identifies Microsoft Azure as the backbone for the generative AI features. Crucially, the documentation confirms that Grammarly utilizes an enterprise agreement with Azure that enforces a “zero retention” policy for the LLMs, meaning Microsoft cannot store or view the text processed through their API. This neutralizes the concern that a third-party AI provider is harvesting user essays or emails.

5. Technical Architecture and Keylogging Refutation

Source: Grammarly Engineering Blog: “Building Secure AI Interfaces” (Jan 2025).
Relevance: Technical documentation explaining the client-side filtering method. It details how the browser extension detects input type="password" and adds the data-gramm-mode="passive" attribute to prevent data transmission. This source supports our “Technical Reality” verdict regarding the keylogging myth, proving that the architecture is designed to ignore sensitive fields by default.

6. Transparency and Government Requests

Source: Grammarly Transparency Report (2025).
Relevance: This report discloses the volume of government subpoenas received. It establishes that Grammarly requires valid legal process (such as a search warrant) to disclose content data and that they notify users of such requests unless prohibited by law. This distinguishes the service from platforms that might voluntarily hand over data without a court order.