Core
30+ languages
Grammar, style, and punctuation for English, German, Spanish, French, Portuguese, Dutch, Polish, Russian, Chinese, Japanese and more — one tool for multilingual teams.
Updated for 2026
LanguageTool Review 2026: Best Open Grammar Checker?
Privacy-first grammar and style checker across 30+ languages, with paraphrase, personal dictionary, add-ins, and a self-hostable server.
Core Capabilities
Why LanguageTool stands out for multilingual writers.
Edit
Style & paraphrase
Rewrites wordy sentences, suggests synonyms, and offers a dedicated paraphrasing tool — clearer, more confident writing.
Privacy
Privacy-first
EU servers, texts deleted after checking, no training on your data. Self-hostable for full control.
Everywhere
Add-ins & apps
Browser, Google Docs, MS Word, Outlook, iOS/Android keyboard, and a desktop app — cover every writing surface.
Smart
Personal dictionary
Ignore lists and team dictionaries stop false positives on brand and technical terms.
Dev
API & self-host
REST API plus an open-source server you can run on your own hardware — unique among mainstream checkers.
Pros & Cons at a Glance
Pros
- 30+ languages in one tool
- Privacy-first, EU servers
- Self-hostable open-source server
- Paraphrase + style suggestions
- Team dictionary / ignore lists
- Add-ins for every platform
Cons
- English accuracy trails Grammarly
- No full AI generation
- Free tier limited (10k chars)
- Team features need paid
- Interface less polished
Pricing (2026)
Most popular
PREMIUM
$3.42/mo
Yearly billing ($41/yr)
- Unlimited text
- Style + paraphrase
- Personal dictionary
- Picky mode
TEAM
$4.92/user/mo
Yearly billing ($59/user/yr)
- Team dictionary
- Admin dashboard
- Priority support
- Central billing
Who it's for
Best-fit scenarios for LanguageTool
Multilingual writers
One checker across 30+ languages.
Privacy-focused users
EU servers, no training on your text.
Self-host teams
Run the open-source server in-house.
Students
Free tier plus paraphrase help.
Non-English markets
Strong coverage beyond English.
Developers
API + self-host for custom apps.
Our honest take
LanguageTool is the best privacy-first, multilingual grammar checker — and the only mainstream one you can self-host. English accuracy trails Grammarly, but for non-English and privacy-conscious teams it's the pick.