LanguageTool
Open-source multilingual grammar and style checker with self-hosted option
Best for
Best for multilingual writers and privacy-sensitive teams who want grammar checking that supports self-hosting
At a glance
- Pricing
- freemiumfrom $4.99/mo
- Setup time
- 10 minutes
- Learning curve
- easy
- Last verified
- 5/21/2026
What we love
- ✓Multilingual coverage is broader than competitors
- ✓Self-hosted option is a real differentiator
- ✓Open-source community keeps it transparent
Where it falls short
- −English suggestions less polished than Grammarly
- −UI is functional rather than slick
- −Paraphrasing trails QuillBot
Pricing
✓ Pricing verified Jun 21, 20264 tiers
Free
monthly
- ✓Core grammar
- ✓20000-character limit
- ✓All languages
Premium
monthly billed annually
- ✓Advanced style
- ✓Paraphrasing
- ✓60000-character limit
Teams
per user monthly billed annually
- ✓Premium features
- ✓Admin
- ✓Centralized billing
Enterprise
annual contract
- ✓Self-hosted
- ✓SSO
- ✓SLA
- ✓API
Why we picked it
LanguageTool is the privacy-conscious answer to Grammarly. The self-hosted option keeps text on your own server, which closes the door for whole sectors that can't use US SaaS editors.
Overview
LanguageTool is a grammar and style checker that supports 30+ languages and offers a self-hosted version under the LGPL license. It's the standard pick for European writers and any team that needs on-premise grammar checking for compliance reasons. Premium adds advanced style rules, paraphrasing, and longer text limits.
Key features
- ●Grammar and style across 30+ languages
- ●Self-hosted on-premise option (LGPL)
- ●Browser, Word, Docs, mobile apps
- ●Picky Mode for advanced style rules
- ●Paraphrasing on Premium
- ●Personal dictionary and style rules
- ●Public API
Best use cases
Multilingual content
Check grammar across English, German, French, Spanish, and Portuguese in one editor.
Privacy-sensitive editing
Self-host on internal servers for legal, healthcare, and government teams.
Integrations
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