Is Grammarly safe? What it collects and trains on

Grammarly is a mainstream, paid-for product, not malware, and it says it does not sell your writing. The real question is what happens to your text after you type it: Grammarly sends it to its servers to check it, and for personal accounts the setting that lets Grammarly use your content to train its AI is on by default.

That second part is easy to change. Here is what Grammarly collects, what it trains on, and which settings to check, all from Grammarly's own help center and privacy policy.

One naming note first: Grammarly is now part of Superhuman. Its privacy policy now lives at superhuman.com and covers Superhuman Platform Inc. (formerly Grammarly).

What Grammarly collects

Grammarly's privacy policy, effective July 6, 2026, lists several kinds of data. The ones that matter most:

• Your content. The policy calls it user content: "emails and drafts, text, screen content, web pages, documents, files, calendars, images, data, and any other content you allow our products to access."
• Account details. Email address, password, name, and in some cases job title and phone number.
• Technical data. Your IP address, device and browser type, apps installed on your device, time zone and location, and operating system.
• Usage data. Which features you use and how you interact with the apps and websites.
• Inferences. The policy says that, depending on your account settings, Grammarly may infer what industry you work in and your writing style from how you use it.

Grammarly's privacy and security FAQ says data is stored on Amazon Web Services servers in the United States, encrypted in transit with TLS and at rest with AES-256. Documents you save in the Grammarly Editor stay until you delete them.

So yes, Grammarly sees what you write while it is switched on. That is how it checks your writing. The question is what else that text is used for.

Does Grammarly train AI on your writing?

It can, depending on your account and one setting. The privacy policy says: "We also use information we collect to train our AI models," and that you can decide whether your content is used by adjusting the training control in your account settings.

The control is called Product Improvement and Training. According to Grammarly's help page on the control, it covers three things: training datasets for AI and machine learning, validating models, and deciding which features to build. For individual users it is on by default.

Two details from that page are worth knowing:

• Turning it off does not stop everything. Grammarly says it may still collect non-content data, such as writing statistics like total words written, types of suggestions accepted and mistakes made, and use that for product improvement and training.
• Outside AI providers. Grammarly's FAQ says prompts for its generative AI features are shared with a small number of service providers, and that it does not allow those large language model providers to train their models on user content.

Grammarly also says it does not sell or monetize your content, and that it makes money from paid plans.

How to turn off AI training in Grammarly

The steps depend on your plan, per Grammarly's help page.

Grammarly Free and Premium

1. Go to your account's privacy settings at account.grammarly.com/security/privacy.
2. Click the Product Improvement and Training toggle to turn it off.

Grammarly Pro with one user

1. Go to your data settings at account.grammarly.com/admin/data_settings.
2. Click the Product Improvement and Training toggle.

Multi-user accounts

Only an admin can change it, from the same data settings page. If you are a team member and cannot see the toggle, ask your admin.

You can change the setting at any time. Grammarly's help page does not say whether turning it off removes content that was already used, so do not assume it does.

Business, school and personal accounts are not the same

This is the part most answers miss. Grammarly's defaults depend on how the account was bought:

If you join a team account, you take on whatever setting the admin chose. If you leave a team and become a free user, the team's setting carries over, and you can then change it yourself.

There is a second difference. The privacy policy says it does not apply to content you write in an account managed by your employer or school. That content is handled under the organization's contract with Grammarly, and the organization can access and control your account. So "is Grammarly safe to use for work" has two answers: ask whether your company bought it through Sales or on the website, and ask what your company's own policy says about it.

Is Grammarly safe for confidential information?

Grammarly does not promise it is. Its security FAQ lists encryption, restricted employee access and third-party security testing, and its is Grammarly safe page lists the certifications it holds. But the same FAQ also says: "We cannot and do not guarantee absolute security."

Grammarly does say it is not a keylogger. Its FAQ says it does not record every keystroke on your device and is blocked from read-only and sensitive fields such as payment forms, passwords and addresses, on a best-efforts basis.

For confidential work, the practical move is to keep Grammarly away from that text:

• In a browser. Click the Grammarly icon in the toolbar on the site and turn off Allow extension to check text on... for that site. To switch it off everywhere, open a new tab, click the icon and turn off Check text with browser extension. (Grammarly's steps.)
• On Windows and Mac. Put your cursor in the app, then right-click the Grammarly widget on Windows or click the menu bar icon on Mac, and choose Turn off Grammarly or Turn off Grammarly for 1 hour. Manage the list under Settings, then Block list. (Grammarly's steps.)

If your employer has rules about AI tools, they come first.

Is Grammarly safe to give full access on iPhone?

When you give any third-party keyboard full access, Apple shows a warning that it can transmit things like credit card numbers and passwords. Grammarly's help page on that warning says Apple blocks third-party keyboards, including Grammarly's, from any field the app or website marks as sensitive, and that Grammarly ignores card numbers and passwords on a best-effort basis.

That means the protection depends partly on the app you are typing into marking its fields correctly. If you are unsure, switch to the standard keyboard for sensitive typing.

See and delete what Grammarly holds

• Personal data report. Go to your privacy settings and click Submit Request next to Personal Data Report. Grammarly says it emails you when it is ready, typically within a few hours, and access expires after seven days.
• Saved documents. Delete them in the Grammarly Editor. Grammarly says items in Trash are permanently deleted after 30 days, or right away if you use Empty Trash.
• Your account. Sign in, go to the Profile page and click Delete Account at the bottom. Grammarly says this removes your personal information, including saved Editor documents, and cannot be undone. Work accounts must be removed by the admin first. (Grammarly's steps.)

Frequently asked questions

Does Grammarly sell my data?

Grammarly says it does not sell or monetize the content you upload. Its privacy policy does say it shares some identifiers, such as cookie IDs and IDs generated from your email address, with advertising partners to promote its own products, and explains how to opt out through the "Your Privacy Choices" link.

Can Grammarly employees read my writing?

Grammarly says access is limited to authorized staff with approved permissions, and gives the example of support staff looking at a document, with your permission, to fix a problem.

Is Grammarly safe to use for school?

Grammarly for Education accounts have Product Improvement and Training off by default, according to Grammarly. Whether you are allowed to use it for assignments is a question for your school's rules.

Is the Grammarly download safe?

Download it from Grammarly's own website or your device's official app store. Grammarly is a mainstream app, and the privacy questions above matter more than the installer.

Does turning off Product Improvement and Training stop Grammarly reading my text?

No. Grammarly still processes your text to give suggestions while it is switched on. The toggle controls whether your content is used to train models and improve the product.

Where your email fits in

Grammarly runs inside your email too, so it is worth knowing what your email provider does with your mail as well. If you use Gmail, see does Google AI read my Gmail, and for work accounts, can my employer read my email.

Secria Mail has no ads, and Secria never mines your mail. Your mailbox is locked with a key made from your password, on your device. Sign-up is a name, the address you want and a password, with no phone number. Create a free account.