LanguageTool

Open-source grammar, punctuation, and spelling checker supporting 30+ languages.

Servicefreemiumglobal

LanguageTool is an open-source grammar, punctuation, and spelling checker that supports more than 30 languages and is available as a freemium service with browser add-ons. It is aimed at writers, students, and multilingual users who need cross-language checking or an option to self-host for greater privacy instead of relying solely on cloud-based English-only checkers.

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Problem & pain-point mapping
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What it's a strong alternative to
Trust & credibility signals

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