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LanguageTool — open source alternative

Open source grammar, spelling and style checker.

Strengths

  • Supports 25+ languages.
  • Self-hostable — your text never leaves your server.
  • Browser extensions and editor integrations.

Weaknesses

  • Grammar feel less polished than Grammarly on edge cases.
  • Premium rules require paid tier or self-host config.
  • Java-based deployment footprint.
License: LGPL-2.1 Self-host difficulty: 2/5 Hosted cloud optionDesktop: Windows, macOS, Linux

Official site · Source on GitHub

Ad slot — OSS middle

LanguageTool is used as an alternative to

Grammarly

AI-powered grammar, spelling and tone checker.

See all alternatives →

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