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LanguageToolEloquent
Freemium

A free tier is available and the engine is open source. Premium features are paid.

 Free

Free and open source under the GPL-3.0 licence.

Windows, macOS, Linux, Web, Self-hosted, Browser extension Linux
  • The checking engine is open source and can be self-hosted offline
  • Covers far more languages than most grammar checkers
  • Works fully offline
  • Supports more than 20 languages
  • The hosted service sends your text to their servers unless you self-host
  • Advanced style suggestions and long texts need a paid plan
  • Linux only
  • Small project with a short commit history
Browser extension, Downloadable app, Self-hosted Downloadable app
Open source Open source
License: LGPL-2.1 License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.