What is Grammarly?
Grammarly checks writing for grammar, spelling, punctuation, tone and clarity as you type, via a browser extension, desktop app, and integrations with tools like Google Docs, Gmail and Microsoft Word. Its generative features (Grammarly's AI assistant) can also draft, rewrite or adjust the tone of text on request. The free tier covers core grammar and spelling checks; Grammarly Premium adds tone and clarity suggestions, plagiarism detection and full-sentence rewrites; Grammarly Business adds team style guides and admin controls.
Best use cases
- Grammar and spelling correction
- Tone adjustment
- Professional email and document writing
Key features
- Grammar and spelling check
- Tone detection
- Plagiarism detection
- Browser extension
AI Tool Compass Score
6.6A computed score based on documented features, pricing accessibility, free plan and integrations — not a user rating or a claim of hands-on testing. See our full methodology.
Features
6.7/10
Value
8.0/10
Free plan
10.0/10
Integrations
0.0/10
Pros
- Works inline across most apps and browsers via extension
- Good balance of automation and user control
- Plagiarism detection on paid tiers
Cons
- Full feature set requires a paid plan
- Suggestions occasionally miss context/nuance
Recommended prompts
Recommended workflows
Related guides
Use cases
User reviews
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Editorial review — pricing and features verified September 2026. Learn how we evaluate tools.