LanguageTool
WritingOpen-source grammar checker supporting 30+ languages
3 comparisons 1W – 2L
Pricing
Free
$0/mo
- 10,000 characters per check
- Basic grammar & spelling
- Browser extension
Premium
$4.99/mo (annual)
- Unlimited characters
- Advanced style suggestions
- Picky mode for advanced checks
- Team dictionary
Enterprise
Custom pricing
- Self-hosted option
- API access
- Custom dictionaries
- Dedicated support
Key Features
- Grammar and spell checking in 30+ languages including German, Spanish, French, and Portuguese
- Open-source core with self-hosted deployment option
- Picky mode for stricter style and tone enforcement
- Browser extensions for Chrome, Firefox, Edge, and Safari
- Integrations with Google Docs, Word, LibreOffice, and email clients
Pros & Cons
Pros
- Genuinely multilingual — native support for 30+ languages, not just English translation
- Privacy-focused with self-hosting option for sensitive documents
- Extremely affordable at $4.99/mo annual — less than half of Grammarly Premium
Cons
- AI features are minimal compared to GrammarlyGO — no generative writing assistant
- Browser extension is less polished — occasional lag and UI inconsistencies across platforms
- Free tier limit of 10,000 characters per check requires copy-paste for longer documents
LanguageTool Comparisons
LanguageTool vs 
QuillBot
LanguageTool wins for pure grammar checking, multilingual writing, and value. QuillBot wins if paraphrasing and summarizing are your primary needs.
LanguageTool wins
LanguageTool vs 
ProWritingAid
ProWritingAid wins for English-language writers who need deep style analysis and long-form editing tools. LanguageTool wins for multilingual writers and budget-conscious users who need reliable grammar checking across 30+ languages.
ProWritingAid wins
LanguageTool vs 
Grammarly
Grammarly wins for AI-powered English writing. LanguageTool wins for multilingual support and privacy.
Grammarly wins