LanguageTool
Grammar, spelling and style checker for many languages, with browser and editor add-ons and an open-source server.
- Free plan or free tier
- Developer API
- Can be self-hosted
Open-source prose linter that checks docs against style rules you define, often run in code editors and CI pipelines.
Not enough info yet on drafts text with AI, developer API. Check the tool's own site.
Listing written by SnappyGuides, checked 2026-11-04. Report a correction or request removal. Back to technical writing checks.