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Office & Productivity

Harper

Offline, privacy-first grammar checker. Fast, open-source, Rust-powered

Official siteSource repository

Why it is included

Harper checks your writing instantly—fast, lightweight and utterly private—so you can polish every clause without surrendering a single keystroke.

Best for

Users exploring vetted FOSS alternatives in this space (proofreading).

Strengths

  • ~10,195 GitHub stars (per upstream list)
  • Open source

Limitations

  • Verify license, platform support, and security posture for your environment.

Good alternatives

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