KeenVerdict

Review · AI tools

LanguageTool review

Multilingual grammar, style and punctuation checker with browser, email, office and desktop add-ons.

By the KeenVerdict research desk · Updated November 10, 2026

Features (40%)
8.6
Ease of use (30%)
8.7
Value (30%)
8.6

LanguageTool is the strongest pick when English is not the only language you write in. The vendor lists English, German, Portuguese, Spanish, French and Dutch plus more than 30 other languages and dialects, and its English checks cover six regional varieties. The free version corrects spelling and simple punctuation. Premium adds enhanced grammar, punctuation and style checking, raises the limit to 150,000 characters per text field and includes unlimited AI paraphrasing and a style guide add-on. Coverage of apps is broad: browser add-ons for Chrome, Edge, Firefox and Opera, email add-ons for Gmail, Apple Mail and Thunderbird, and plugins for Google Docs, Word, Apple Pages and LibreOffice. Team plans add user management, a team style guide and a team dictionary. Our location showed only PLN prices, so the USD price is pending. Pick it for multilingual work; pick Grammarly if you write only in English and want more rewrite tools.

Who it is for

Writers who check text in English plus German, Spanish, French, Dutch, Portuguese or other languages.

Price

See vendor pricing (USD check pending).

US price check pending. See the vendor pricing page.

Key features

  • Checks English, German, Portuguese, Spanish, French, Dutch and more than 30 other languages and dialects
  • Premium checks up to 150,000 characters per text field
  • Unlimited AI sentence paraphrasing on Premium
  • Add-ons for Chrome, Edge, Firefox, Gmail, Google Docs, Word, Apple Pages and LibreOffice
  • Team plans with a shared style guide and team dictionary

Strengths and weaknesses

  • Strength: The widest language coverage on this list
  • Strength: Free version handles spelling and simple punctuation
  • Strength: Plugins cover open-source tools such as LibreOffice and Thunderbird
  • Weakness: USD pricing could not be confirmed from our location
  • Weakness: Enhanced grammar and style checks need Premium
  • Weakness: Paraphrasing is less central than in QuillBot or Wordtune

Key facts

  • Free plan: Yes, spelling and simple punctuation
  • Premium text limit: 150,000 characters per text field
  • Languages: More than 30 beyond the six it names

Where it ranks

LanguageTool is No. 2 in our Best Grammar Checkers verdict.

Alternatives we scored

Visit languagetool.org · Questions or corrections: editorial@keenverdict.com