Multilingual grammar, style and spell checker with an open source core
LanguageTool checks grammar, spelling, punctuation and style in dozens of languages, including English, French, German, Spanish and Portuguese. It integrates with browsers, Microsoft Word, Google Docs, LibreOffice and desktop apps, and Premium adds AI rephrasing and deeper style checks. The core engine is open source under the LGPL, so organizations can run their own server for privacy.
- features
- 4
- alternatives
- 6
- platforms
- 6
- Updated
- Oct 12, 2026
Features
Our take
Pros
- Checks grammar and style in dozens of languages
- Open source core can run on your own server for privacy
- Integrates with Word, Google Docs, LibreOffice and browsers
Cons
- AI rephrasing and deeper style checks require Premium
- A self-hosted server lacks the Premium checks
Editorial assessment by the Alternatives.tools team, based on what the product is known for. Not a user review.
Best LanguageTool alternatives
See all 6 alternatives
GrammarlyFreemiumWriting assistant that checks grammar, clarity and tone wherever you type
4.7(226K) · App Store
ProWritingAidFreemiumGrammar checker and style editor with in-depth reports for writers
3.1(28) · Firefox Add-ons
QuillBotFreemiumParaphrasing tool with grammar checker, summarizer and citation generator
DeepL WriteFreemiumAI writing assistant from DeepL that corrects and rephrases text
WordtuneFreemiumAI rewriting assistant that suggests alternative phrasings
Hemingway EditorFreemiumReadability editor that highlights dense sentences and passive voice
User reviews
No reviews yet. Be the first to share your experience with LanguageTool.