LanguageTool
AI-powered grammar, style, and paraphrasing assistant for professional writers across 30+ languages.
- Daten: Mixed
- DSGVO-nativ
- EU-eigen
- Selbst hostbar
- Open Source

LanguageTool is an open-source, German-built AI writing assistant that detects grammar, spelling, punctuation, style, and word choice errors across 30+ languages. Founded in 2003 and supported by EU funding, it offers both free and premium tiers with cross-platform integration (browsers, office apps, email) and full self-hosting capability.
LanguageTool is an open-source, German-built AI writing assistant that detects grammar, spelling, punctuation, style, and word choice errors across 30+ languages. Founded in 2003 and supported by EU funding, it offers both free and premium tiers with cross-platform integration (browsers, office apps, email) and full self-hosting capability.
Highlights
- ✓Multilingual support covering 30+ languages and dialects with automatic detection
- ✓AI-powered paraphrasing and advanced style analysis beyond basic grammar checking
- ✓Open-source and self-hostable with full HTTP and Java API documentation
- ✓Cross-platform integration (browsers, Google Docs, Word, LibreOffice, email clients) with privacy-respecting browser extension that stores no text locally
- Datenstandort
- Mixed
- Preis
- Freemium
- EU-eigen
- Ja
- Selbst hostbar
- Ja
Gut für
- Professional enterprise communication across 150+ companies including BMW, EU institutions, and media outlets
- Academic writing for dissertations and research papers with multilingual dialect support
- Content teams creating in multiple languages who need consistent style and tone analysis
Eine europäische Alternative zu
Häufige Fragen
- Ist LanguageTool EU-eigen und DSGVO-nativ?
- LanguageTool — EU-eigen: Ja; DSGVO-nativ: Ja; selbst hostbar: Ja; Daten gespeichert in: Mixed.
- Was kostet LanguageTool?
- Preismodell: Freemium. Aktuelle Pläne und Preise auf der Website von LanguageTool.
- Welche europäischen Alternativen gibt es zu LanguageTool?
- Vergleiche DSGVO-native europäische Alternativen zu LanguageTool — wo sie gebaut, besessen und gehostet werden.
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