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Originality.aiUndetectable AI
Freemium

Three free AI scans per day, with paid plans for more.

 Freemium

Free to use in the browser, with business plans offered.

Web, Browser extension Web, Browser extension
  • AI detection plus plagiarism, readability and fact checks
  • Chrome and Firefox extensions with Google Docs support
  • AI text detection with sentence-level highlighting
  • Rewriter for stiff or machine-sounding text
  • Free tier is limited to three scans a day
  • AI detection results are estimates and can be wrong
  • AI detection results are estimates and can be wrong
  • Using the humanizer to pass off AI text may breach academic or workplace rules
Web application, Browser extension Web application, Browser extension
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Needs internet Needs internet

Checked September 26, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.