Grammarly

Grammarly is one of the best-known tools in the writing category, helping millions catch mistakes and improve how their text reads. It works quietly in the background across browsers, desktop apps and phones, underlining issues as you type.

What it does

At its core, Grammarly checks grammar, spelling and punctuation in real time. Beyond that, it flags problems with clarity, tone and conciseness, suggesting rewrites that make sentences easier to read. Newer generative AI features can draft text from a short prompt, shorten long passages, or shift a message from casual to formal.

Because it lives in a browser extension, a desktop app and a mobile keyboard, the same feedback follows you into email, documents, social posts and chat.

Who it’s for

Students, professionals and teams who want cleaner, more confident writing without leaving their usual apps. The free plan handles everyday corrections well, while Pro and Business plans add tone controls, advanced rewrites, plagiarism checks and shared style guides. It suits non-native English writers and busy professionals who value quick, dependable polish over deep stylistic control.