Is Grammarly: AI Writing Assistant and Grammar Checker App Safe? — Extension Safety Profile
Quick verdict: Grammarly: AI Writing Assistant and Grammar Checker App earns a safety grade B, 72.2 out of 100, based on 5 of 5 dimensions.
72.2/100
Grade B · 5 of 5 checks
What we found
Automated safety profile from public signals (the extension's manifest & permissions, store listing, publisher, privacy policy). A full review hasn't been published yet.
What Grammarly: AI Writing Assistant and Grammar Checker App's safety grade means
Grammarly: AI Writing Assistant and Grammar Checker App earns a safety grade of B (72.2/100), measured across 5 of 5 dimensions. Its strongest area is Maintenance & Ownership (100%). The weakest is Permissions & Access (52%) — what holds its grade back the most.
On the public records we can check, Grammarly: AI Writing Assistant and Grammar Checker App looks broadly trustworthy. 38,000,000 active users/installs reported on the store. Store rating 4.5/5 from 43,100 user ratings. Last updated on the store 2026-06-17 (today). This is an automated profile, not a hands-on review — so treat the grade as a starting point: open Grammarly: AI Writing Assistant and Grammar Checker App's own store listing and privacy policy before installing, and weigh it against the other browser extensions we track below.
Safety Signals
Based on 5 of 5 safety dimensions
| Dimension | Score | Bar | Source |
|---|---|---|---|
| Publisher & Identity | 60% · 8/20 pts assessed | Automated signals | |
| Permissions & Access | 52% · of 25 pts | Automated signals | |
| Data & Privacy | 80% · 16/20 pts assessed | Automated signals | |
| Maintenance & Ownership | 100% · 7.5/15 pts assessed | Automated signals | |
| Community Reputation | 100% · 10/20 pts assessed | Automated signals |
In-depth safety analysis
Grammarly requests scripting, tabs, and cookies permissions along with host access to http://*/* and https://*/*. This allows the extension to read and modify page content, detect tab activity, and access cookies on every website you visit. For a writing assistant that works across the entire browser, such broad access is expected, though it means the extension can see everything you type into any webpage, including private messages or login forms.
Extensions with this level of access can be attractive targets for counterfeit versions or phishing attempts. A careful user should only install Grammarly from the official Chrome Web Store listing and verify the publisher name. Because the extension processes what you write in real time, it inherently collects website content and personal communications; reviewing the developer-declared data collection practices helps you understand what information is transmitted
AI-assisted analysis of the documented signals above (permissions, store data, privacy practices) — explains what they mean and the risks typical for this category. Not a hands-on test.
What Grammarly: AI Writing Assistant and Grammar Checker App's store listing shows
Who's Behind Grammarly: AI Writing Assistant and Grammar Checker App?
- Publisher Grammarly
How Grammarly: AI Writing Assistant and Grammar Checker App compares
Among the 48 browser extensions we track, Grammarly: AI Writing Assistant and Grammar Checker App scores higher on safety than 31% of them.
Computed from our own database of assessed browser extensions — updated as we track more.
Evidence on File (12)
Grammarly: AI Writing Assistant and Grammar Checker App FAQ
- Is Grammarly: AI Writing Assistant and Grammar Checker App safe?
- Grammarly: AI Writing Assistant and Grammar Checker App earns a safety grade of B (72.2/100) on our evidence-based assessment, based on 5 of 5 safety dimensions we could verify from public records. This is an automated profile built from public records, not a hands-on review.
- Who is behind Grammarly: AI Writing Assistant and Grammar Checker App?
- Grammarly: AI Writing Assistant and Grammar Checker App is operated by Grammarly.