Is Grammarly Safe for Work? What IT Needs to Know Before Employees Install It

Short answer: Grammarly is a well-audited vendor (SOC 2 Type 2, ISO 27001 and 42001, HIPAA, PCI), so the risk is not that Grammarly is insecure. The risk is that a consumer Grammarly account reads nearly everything an employee types, in every app it is allowed to run in, and Grammarly's own FAQ says it may use de-identified samples of that text to improve its models unless the user opts out. That makes Grammarly an account-governance problem, not a block-or-allow problem. dope.security's approach is to see which accounts are in use, allow the company's managed tenant, govern the personal ones, and inspect what leaves the device.

"Is Grammarly safe for work?" gets asked in IT tickets every week because the answer depends on which Grammarly you mean. Grammarly Enterprise bought through a security review and governed by SSO is one thing. The free Chrome extension an employee installed on a Tuesday and signed into with a Gmail address is another, and that second one is the shape of most shadow AI in a mid-size company. This post lays out what Grammarly's own documentation says, where the exposure actually sits, and what control works.

We took the same approach in our guide to whether Otter AI is safe for work: start from the vendor's own statements, find the real control point, and skip the fear. For Grammarly, the control point is the account and the surface it runs on. The product to manage both is dope.security's AI governance stack.

What is Grammarly, and where does it run?

Grammarly is an AI writing assistant that checks grammar, tone and clarity and, since 2023, generates and rewrites text with large language models. The company behind it renamed itself Superhuman in 2025 after acquiring the Superhuman email client; the Grammarly product keeps its name, and Grammarly's privacy policy now sits under the Superhuman policy.

What matters for IT is the footprint. Grammarly ships as a browser extension for Chrome, Safari, Firefox and Edge, as a desktop app for Windows and Mac that works across other applications, as a Microsoft Office add-in, as a Google Docs integration, and as a mobile keyboard. In each of those, Grammarly's job is to read the text field you are typing in so it can suggest changes. That is the feature. It is also the exposure: a Slack message, a CRM note, a support reply with a customer's details, a board memo, all pass through Grammarly's cloud because that is how the product works.

Grammarly is clear that it is not a keylogger: its FAQ says it does not record every keystroke and is blocked from sensitive fields such as payment forms and passwords on a best-efforts basis. Take that at face value. The point is not that Grammarly captures secrets. The point is that it processes nearly everything else.

What Grammarly says about your data

Everything in this section comes from Grammarly's published Privacy and Security FAQ as of November 2026.

• Ownership and sale: Grammarly states that it does not sell or monetize user content and makes money from paid plans.
• Hosting and encryption: data is hosted in AWS in the US East region, encrypted in transit with TLS 1.2 and at rest with AES-256. Enterprise clients can bring their own encryption keys.
• Retention: documents saved in the Grammarly Editor are stored until the user deletes them or the contract ends. Other text is processed as necessary to deliver the service, and no fixed retention period is published for it.
• Training: Grammarly says it may leverage random samples of aggregated and de-identified user content to refine and enhance its service for all customers, unless the user has opted out through the Product Improvement and Training control.
• Third-party LLMs: prompt text and context for generative features are shared with a small number of vetted service providers, and Grammarly says it does not allow those LLM providers to train on user content.
• Compliance: SOC 2 Type 2 (audited by Ernst & Young), ISO 27001, 27017, 27018, 27701 and 42001, HIPAA Security, Privacy and Breach Notification rules, PCI DSS, and the EU-U.S. Data Privacy Framework.
• Admin controls: team administration, SAML single sign-on, two-step authentication, custom session length and security keys are listed as product security features for business plans.

That is a strong posture for a SaaS vendor, and it should take "Grammarly is a security risk" off the table as a blanket statement. It does not settle the question, because the training control and the admin controls apply to the account, not the device.

Why the account type is the whole question

Third-party analyses of Grammarly's plans report that the Product Improvement and Training setting is on by default for consumer accounts (Free, Premium and single-user Pro) with an opt-out, while Business and Enterprise accounts purchased through Grammarly's sales team have training disabled. Grammarly has publicly stated that businesses that go through its security review can opt out of training on their de-identified, sampled data. We could not find Grammarly stating the consumer default in its own FAQ, so treat the per-plan detail as reported rather than vendor-confirmed, and check your own account's setting.

Here is why that matters more than any certification. An employee who installs the free extension and signs in with a personal email has created an account your company does not own, cannot see in your IdP, cannot set the training control on, and cannot offboard. Grammarly's SOC 2 report describes how Grammarly protects that data. It says nothing about whether your company agreed to send it.

That is the pattern we wrote about in sanctioned versus unsanctioned SaaS governance: the same product can be low-risk under a corporate agreement and high-risk under a personal one, and the only control that works is one that can tell the two apart.

Why blocking Grammarly backfires

The reflex is to block grammarly.com at the firewall or DNS layer. Three problems. First, Grammarly's integrations run in Office, Google Docs and the mobile keyboard, and a DNS block on the laptop does nothing for the phone or for traffic that does not resolve where you expect. Second, blocking the whole domain also blocks the Enterprise users you approved, so you have broken the sanctioned tool to stop the unsanctioned one. Third, employees who want grammar help will find another assistant, and the next one may have a weaker posture than Grammarly's.

Our analysis of malicious browser extensions in 2026 makes a related point: an extension holds the page content before any request leaves, so network security mostly cannot see it. Grammarly is legitimate, and the lesson still transfers: you need visibility at the device, where the extension lives.

The control that works: see the account, govern the surface, inspect the exit

Grammarly governance at a 250 to 5,000 person company comes down to three questions, and each maps to a layer in dope.security.

Who is using it, on which account?

dope.security's Shadow IT and AI discovery runs in the endpoint agent and sees every app a device talks to, on any network, without proxy logs to grep. AI Analytics in dope.console surfaces the AI applications in use, the users behind them, the transaction counts and the data volume, with a breakdown of personal versus enterprise-licensed accounts for the AI tools it tracks. The Dopamine agent lets an admin ask in plain English, for example which users are sending text to AI writing tools this week, and get an answer in seconds. That is the inventory step most Grammarly conversations never get past.

Which surfaces are allowed?

From the same console, admins set allow, warn or block policy per application and per group, and the policy lands on every endpoint in under a minute. For Grammarly that can mean allowing it for the teams with an Enterprise agreement, warning everyone else, and watching the AI Analytics screen to see who keeps hitting the warning. Because dope.security inspects SSL on the device, the policy applies to the extension, the desktop app and the Office add-in alike, on the office network, at home or in a hotel.

Where did the OAuth grant go?

Grammarly for Google Docs and Grammarly for Microsoft 365 connect through OAuth, which means they show up as third-party apps authorized against your tenant. dope.security's AI-Powered SSPM, part of CASB Neural, inventories every OAuth-connected app on your Google Workspace or Microsoft 365 tenant with its granted scopes, publisher verification, sign-in telemetry and a composite risk score, and recommends specific actions such as narrowing a scope or revoking a grant. Our walkthrough of shadow AI OAuth apps in Microsoft 365 shows how that review works.

What is leaving the device?

The remaining exposure is the file or prompt an employee sends to an AI tool. dope.security's Dopamine DLP classifies uploads and prompts on the device by meaning, detecting PII, PCI, PHI and intellectual property with no rules to write, and blocks sensitive content before it reaches AI tools such as ChatGPT, Claude, Perplexity, Abacus and Copilot. Text is extracted on the device and classified by an LLM with zero data retention. It is the backstop for the broader AI stack an employee uses alongside Grammarly.

Block-and-hope vs account-level governance: a head-to-head

Two ways to answer the Grammarly question, compared on what each one actually controls.

Blocking Grammarly at the network or DNS layer

A domain block stops Grammarly's web traffic on networks you control. It cannot distinguish a personal account from an Enterprise account, so it breaks the sanctioned tool to stop the unsanctioned one. It does not follow the laptop home, does not touch the mobile keyboard, gives you no inventory of who was using Grammarly, and ignores the OAuth grants already sitting in your Google or Microsoft tenant.

Account-level governance with dope.security

dope.security runs in a single agent on the device, under 100 MB of RAM, and inspects traffic locally on any network. Shadow IT and AI Analytics show which users run Grammarly and other AI tools and, for tracked AI apps, whether the account is personal or enterprise-licensed. Policy is set per app and per group and pushes to every endpoint instantly, so IT can allow the Enterprise team and warn everyone else without breaking either. AI-Powered SSPM reviews the OAuth grants Grammarly's Docs and Office integrations create. Dopamine DLP stops sensitive uploads and prompts to AI tools at the device. All of it lives in one console built from scratch.

Line by line

• Visibility: a block gives you a deny log; dope.security gives you users, apps, volumes and account type.
• Sanctioned vs personal: a block treats both the same; dope.security lets you allow one and govern the other.
• Off-network devices: a DNS block depends on the network; dope.security enforces on the device anywhere.
• OAuth grants: a block ignores them; SSPM inventories and scores them with recommended fixes.
• Data leaving: a block cannot read content; Dopamine DLP classifies it on the device before upload.
• Deployment: a block is quick and brittle; dope.security deploys through Intune or Jamf, and a Fortune 100 customer went from 900 to more than 18,000 devices in weeks.

A practical Grammarly policy for IT

If you want something you can put in the acceptable use policy this quarter, this is the shape that works. Our AI usage policy guide has the full template.

• Grammarly is permitted on company devices only through the company's Grammarly Business or Enterprise account, with SSO enforced and the training control confirmed off.
• Personal Grammarly accounts are not permitted on company devices. Enforcement is a warn policy for 30 days, then block for the personal surface where feasible, with AI Analytics reporting to track adoption of the managed account.
• Grammarly's Google Docs and Microsoft 365 integrations are reviewed in SSPM, with scopes narrowed to what the integration needs.
• Sensitive data categories (customer PII, PHI, financials, source code) are covered by Dopamine DLP in Block mode for uploads and prompts to AI tools.

The bottom line: Grammarly is safe for work when you own the account

Grammarly's security posture is better than most of the SaaS your company already approved. The exposure is not Grammarly's controls; it is that a personal account reads everything an employee types and may sample it for training, under terms your company never agreed to. Blocking the domain does not solve that and breaks the people who did it right. Seeing the account, governing the surface and inspecting the exit does.

dope.security does all three from one agent and one console: Shadow IT and AI Analytics to see who is using what and on which account, instant per-app policy on every device, SSPM for the OAuth grants, and Dopamine DLP for the data on its way out. Start a free trial with your Google or Microsoft login and see your own Grammarly footprint in an afternoon, or book a 20-minute demo.

Frequently Asked Questions

Does Grammarly use your data to train its AI?

Grammarly's FAQ says it may use random samples of aggregated and de-identified user content to refine its service unless the user opts out through the Product Improvement and Training control. Third-party reviews report that the setting defaults on for consumer accounts and off for Business and Enterprise accounts bought through sales. Grammarly also states it does not allow its third-party LLM providers to train on user content. dope.security helps IT see which Grammarly accounts employees actually use so the right setting is in force.

Is Grammarly HIPAA compliant?

Grammarly states that it complies with the HIPAA Security, Privacy and Breach Notification rules, and it holds SOC 2 Type 2, ISO 27001 and ISO 42001 certifications. Compliance applies to the account under a business agreement, not to an employee's personal account, so a healthcare organization should route Grammarly use through its managed tenant. dope.security's AI Analytics and per-app policy make that enforceable on every device.

Can Grammarly see passwords and payment details?

Grammarly says it is not a keylogger, does not record every keystroke, and is blocked from running in read-only and sensitive fields such as passwords and payment forms on a best-efforts basis. It does process the ordinary text fields it is active in, which is most of an employee's working day. dope.security's Dopamine DLP adds a device-side check on sensitive files and prompts sent to AI tools.

Should I block Grammarly on company devices?

Blocking the domain breaks the Enterprise users you approved, misses the mobile keyboard, and fails off-network. A better approach is to allow the company-managed Grammarly account, warn or block personal use, review Grammarly's OAuth grants in your Google or Microsoft tenant, and inspect sensitive data at the device. dope.security delivers that from one agent and one console.

How do I find out who is using Grammarly at my company?

Use an endpoint-based discovery tool rather than firewall logs, because Grammarly's extension and desktop app run on laptops that spend most of their time off your network. dope.security's Shadow IT discovery and AI Analytics list the AI apps in use, the users behind them, transaction counts and data volume, and the Dopamine agent answers plain-language questions about that data in seconds.

Is Grammarly Enterprise safer than Grammarly Free for a business?

Yes, for governance reasons rather than encryption reasons. Enterprise accounts bring SAML SSO, team administration, customer-managed encryption keys and, per third-party reporting, training disabled, all under a contract your company signed. Free accounts offer none of those to the employer. dope.security's role is to make sure the Enterprise account is the one in use and to govern the personal ones that slip through.