LanguageTool

Open-source grammar and style checker for 25+ languages, with browser add-ons, a self-hosted server and a paid Premium plan.

Open source

Active

This replaces Grammarly

Facts

Made by: LanguageTool
Website: languagetool.org
License: License: Open sourceLGPL-2.1-or-later
Pricing: Free tier with paid plansThe free hosted plan checks up to 2,000 characters per field with 3 AI paraphrases a day. Premium raises both.
Platforms: Windows
macOS
Linux
Web
iOS
Self-hosted
Self-hostable: Yes
Works offline: Yes
Account required: No
Telemetry: Browser add-ons and apps send text to the hosted service for checking. A self-hosted server keeps text on your own machine.
Maturity: Stable
Source code: github: languagetool-org/languagetool
Maintenance: Status: ActiveLast commit Oct 8, 2026

Grammarly
Top pick. Best for multilingual checking in browsers and Office.
1 person switched

Repository checks, newest first; last checked Oct 8, 2026. Checks older than 90 days are kept as one per week.

Repository checks for LanguageTool
Checked	Last commit	Latest release	Stars	State
Oct 8, 2026	Oct 8, 2026	None	15,114	Open

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