LanguageTool
WritingFreemium
Open-source grammar checker supporting 30+ languages.
4.712,600 reviews2M+
View Extension
Grammarly
Grammar, spelling and tone suggestions everywhere you write.
4.543,100 reviews~37M+ usersWritingBy Grammarly
Freemium
Reviewed by the Single Tab Browser editorial teamLast tested 2026-07-01Grammarly screenshots
Overview
Grammarly checks grammar, spelling, clarity and tone in almost any text field in the browser — email, docs, CMS editors and social posts. The premium tier adds full-sentence rewrites, tone adjustment and plagiarism detection, while the generative assistant can draft and shorten text on request.
Grammarly is a writing Chrome extension from Grammarly with roughly 37M users on the Chrome Web Store. It holds a 4.5-star average across 43K ratings, which puts it among the better-reviewed options in its category. Pricing is freemium, listed at From $12/mo.
Grammarly checks grammar, spelling, clarity and tone in almost any text field in the browser — email, docs, CMS editors and social posts. The premium tier adds full-sentence rewrites, tone adjustment and plagiarism detection, while the generative assistant can draft and shorten text on request.
The trade-off is the usual one for a freemium extension: the free tier gets you the core feature and the paid tier unlocks the parts most people eventually want. With 37M users, complaints and fixes surface quickly, so check the review notes below before installing it alongside other writing extensions.
How to install and set up Grammarly
- 1Open the Chrome Web Store listing for Grammarly and click Add to Chrome, then Add extension.
- 2Pin the icon: click the puzzle-piece button in Chrome's toolbar, find it in the list and click the pin so it stays visible.
- 3Open the extension once and walk through its first-run screen — a writing extension usually asks which sites it may act on.
- 4Test it on a page you know well before relying on it for daily work.
- 5To remove it later, right-click the toolbar icon and choose Remove from Chrome, or use chrome://extensions.
Key features
Real-time grammar checking
Inline underlines with one-click corrections in any text field.
Tone detection
See how your message is likely to read before sending it.
Generative rewriting
Shorten, expand or restyle a paragraph on request.
Plagiarism detection
Premium check against billions of web pages.
Who should use Grammarly?
Professionals and students who write daily in the browser and want a safety net before hitting send.
Pricing
Grammarly is freemium — From $12/mo. The free tier is usable for evaluation; compare paid tiers before committing a team.
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View ExtensionFrequently asked questions
Is Grammarly free?
It is a freemium extension with a listed price of From $12/mo. The free tier covers the core feature; paid tiers unlock the rest.
How many people use Grammarly?
Roughly 37M Chrome users have it installed, and it holds a 4.5-star average from 43K ratings.
Is Grammarly safe to install?
Grammarly is published on the official Chrome Web Store by Grammarly, so it passes Google's review. Check the permissions it asks for on install and prefer the store listing over third-party mirrors.
What are the best Grammarly alternatives?
The alternatives page lists the closest writing extensions ranked by installs and rating, with a head-to-head comparison for the top pick.
Related extensions to Grammarly
Picked from the Writing category and the tags grammar, writing, ai writer — jump straight to the alternatives and head-to-head pages people open next.
LanguageTool alternativesOpen-source grammar checker supporting 30+ languages.Wordtune alternativesAI rewriting assistant that rephrases sentences in context.Cambridge Dictionary alternativesLook up selected text in 'Cambridge Dictionary' page.Google Translate Plus AI alternativesAdds AI to Google Translate: translate definitions and view document translations side-by-side.Grammarly vs LanguageToolIs LanguageTool as good as Grammarly?Grammarly vs WordtuneGrammarly or Wordtune for rewriting?LanguageTool vs WordtuneLanguageTool or Wordtune: which should I install?All Writing extensionsEvery writing extension in the directory, ranked.
Compare Grammarly with the obvious rivals
Side-by-side feature tables, pricing and a clear recommendation.
Grammarly vs LanguageToolThe market leader against the open-source challenger with self-hosting and stronger multilingual support.Grammarly vs WordtuneCorrectness-first editing versus rewriting and tone control for the same sentence.Grammarly vs LanguageToolHead-to-head breakdown with real install and rating data.Wordtune vs GrammarlyHead-to-head breakdown with real install and rating data.LanguageTool vs GrammarlyHead-to-head breakdown with real install and rating data.Grammarly alternativesRanked replacements if Grammarly is not the right fit.All comparisonsThe full compare hub, grouped by category.
Shortlists featuring Grammarly
Best AI Chrome ExtensionsThe AI Chrome extensions worth a permission grant, grouped by the job they do: answering, summarising, writing and archiving. Live store ratings and honest limits.Best Writing Chrome ExtensionsWrite better everywhere with the best writing extensions — Grammarly, LanguageTool, Text Blaze and more.