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LanguageToolHemingway Editor
Freemium

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

 Freemium

The editor can be tried free; the Plus AI tier is paid after a two-week trial.

Windows, macOS, Linux, Web, Self-hosted, Browser extension Web
  • The checking engine is open source and can be self-hosted offline
  • Covers far more languages than most grammar checkers
  • Highlights hard-to-read sentences at a glance
  • Plus tier adds grammar checks and tone adjustment
  • The hosted service sends your text to their servers unless you self-host
  • Advanced style suggestions and long texts need a paid plan
  • AI fixes require the paid Plus tier
  • Research gives few details beyond the web editor
Browser extension, Downloadable app, Self-hosted Web application
Open source Closed source
License: LGPL-2.1 License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked September 24, 2026

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