Grammarly

Grammar and tone checking that works everywhere you type.

Open official site grammarly.comFree tier available · from $12/moAI Writing Tools

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.

Grammarly is the one tool here most people already have running, which makes the real question what to let it change. It is reliable on mechanics — grammar, agreement, obvious clumsiness — and much more debatable on tone and concision, where its suggestions tend toward a flattened, corporate register. Writers who keep it for years generally accept the first category and ignore the second. If you write in a voice that matters, that split is the whole skill of using it.

Our take

The lowest-risk tool in this whole directory, because it works on text you already decided to write. It corrects, tightens and flags tone without inventing substance, which means it cannot introduce a fact you did not check. That modesty is the point — it is the one writing tool that improves your work without replacing your voice.

Last checked 2026-07-26

Best for

Second-language writers who want their meaning to land cleanly
Professional correspondence where tone matters more than style
Catching the errors you reliably stop seeing in your own text

Limitations

Suggestions trend toward the conventional and can flatten deliberate style
It reads everything you type where it is installed
Advanced rewriting sits behind the paid tier

When to pick something else

Creative writing with a deliberately unusual voice
Confidential material typed in environments you do not control

Key features

Works across browser, desktop apps and mobile keyboards
Tone detection alongside grammar
Team style guides on business plans

Grammarly alternatives

If Grammarly is not the right fit, these solve similar problems.

Grammarly alternatives →