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No. 12 of 88 ·Grammar checkers

Harper

Web · Windows · Mac · Linux

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Freedom report

Three barsScore 7.6

  • Free tierA free tier is on its own pricing page
  • Open codeNo open-source code on record
  • Runs widely4 of 6 device platforms
  • DocumentedPlans, terms and facts published

Harper is ranked #12 of 88 in grammar checkers on Freedom251. It runs on Web, Windows, macOS, Linux. There is a free plan.

Harper plans and pricing

All plans
Free Free Grammar and spelling checking · Local processing · Apache-2.0 open-source license writewithharper.com · 20 Sept 2026

Compared on grammar checkers

Free plan
Yes
Browser extension
Yes
Desktop app
Yes

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