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Grammarly

The best-known grammar and tone checker, with AI drafting built into a browser extension and desktop apps.

Free plan + paidAI writing assistants
Visit GrammarlySee 6 alternatives
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About Grammarly

Grammarly checks spelling, grammar, punctuation, clarity and tone as you type, and adds generative AI for drafting and rewriting. It works in most places people write: a browser extension for Chrome, Safari, Edge and Firefox, desktop apps for Windows and Mac that hook into other programs, and keyboards for iPhone and Android. The free plan covers basic corrections and a small monthly allowance of AI prompts; the paid Pro plan adds full-sentence rewrites, tone adjustments, plagiarism and AI-text detection, and a much larger prompt allowance. Teams and enterprises get style guides, brand tones and admin controls. The company behind it renamed itself Superhuman in 2025 after buying the Superhuman email client, and enterprise features are increasingly sold as part of that wider suite, though Grammarly remains the product name. It is English-first; other languages are limited. The main concern people raise is privacy, since text is processed in Grammarly's cloud.

Best for: English writers who want corrections and AI help everywhere they type, without changing apps.

Pros and cons

What works

  • Works across browsers, desktop apps and phone keyboards
  • Free plan is genuinely useful for spelling and grammar
  • Team style guides and brand tones on business plans

Why people leave

  • Text is processed in the cloud, which rules it out for some work
  • Best features need Pro, and monthly billing is expensive
  • Mostly English; weak for other languages

Top Grammarly alternatives

See all 6
  1. 1LanguageTool logo
    LanguageTool

    Covers 30+ languages and has an open-source core, for people who write in more than English.

    66.5
  2. 2ProWritingAid logo
    ProWritingAid

    Deeper style and manuscript reports, aimed at long-form and fiction writers.

    62.6
  3. 3Harper logo
    Harper

    Free, open-source and runs entirely on your device, so nothing you write leaves it.

    57.2
  4. 4Wordtune logo
    Wordtune

    Focuses on rewriting sentences in different tones, with a lower-priced paid plan.

    55.3
  5. 5Linguix logo
    Linguix

    Similar browser-extension checker with a cheaper Pro plan.

    53.6

Why people left Grammarly

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

No switching stories yet. If you moved away from Grammarly, review the app you switched to and tell us why.

Reviews

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Grammarly: common questions

Is Grammarly free?

Grammarly has a free plan and paid plans. Free plan: Yes, $0/month (checked on Grammarly's own site).

Is Grammarly open source?

No, Grammarly is not open source. Open-source alternatives include LanguageTool and Harper.

What platforms does Grammarly run on?

Grammarly is available for Web, Windows, macOS, iOS, Android and Browser extension.

What are the best alternatives to Grammarly?

The highest-ranked Grammarly alternatives right now are LanguageTool, ProWritingAid and Harper. See the full ranked list for pricing, platforms and verified facts.

See all 6 Grammarly alternatives