LanguageTool
Multilingual grammar checker.
FreemiumAPIOpen source
0 · Unverified
Live preview of https://languagetool.org
TL;DR
LanguageTool checks grammar and style in many languages; free tier, open source.
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FAQ
Is LanguageTool free?
LanguageTool is freemium. Its free tier is not verified card-free.
Does LanguageTool have an API?
Yes, LanguageTool offers an API.
What are alternatives to LanguageTool?
Alternatives include Hemingway Editor, Type, QuillBot.