Compare software

LanguageToolProWritingAid
Freemium

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

 Freemium

Free to start, with a paid version that unlocks the full toolkit.

Windows, macOS, Linux, Web, Self-hosted, Browser extension Web, Browser extension
  • The checking engine is open source and can be self-hosted offline
  • Covers far more languages than most grammar checkers
  • Style and line-editing feedback beyond basic grammar
  • Story planning and critique tools for fiction
  • The hosted service sends your text to their servers unless you self-host
  • Advanced style suggestions and long texts need a paid plan
  • Full feature set requires a paid plan
  • Geared toward fiction, less so toward other writing
Browser extension, Downloadable app, Self-hosted Downloadable app, Web application, Browser extension
Open source Closed source
License: LGPL-2.1 License not stated
Not stated if an account is needed Account needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked September 23, 2026

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