Grammarly
Grammar and tone checking that works everywhere you type.
Grammarly runs as a browser extension and desktop app, catching grammar issues and flagging tone across email, docs and chat. Its reach across applications matters more than any single feature — corrections happen where you actually write.
Our take
Most valuable for non-native English writers doing daily professional correspondence. If you write well already, the free tier catches the typos and that is enough.
Last checked 2026-07-26
Best for
- Non-native speakers writing professional English daily
Limitations
- Suggestions can flatten deliberate stylistic choices
Key features
- Works across browser, desktop apps and mobile keyboards
- Tone detection alongside grammar
- Team style guides on business plans
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