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muffetIntegrity
Free

Free and open source.

 Freemium

Integrity is free; Integrity Plus ($20), Integrity Pro ($59) and Scrutiny ($149) are paid…

Windows, macOS, Linux, Command line macOS
  • Fast concurrent crawling
  • Fits easily into CI pipelines
  • Free link checker with no usage cap mentioned
  • Native macOS app
  • Command line only, no graphical interface
  • Focused on links rather than wider SEO or markup checks
  • Mac only
  • Export, search and sitemaps require a paid version
Downloadable app Downloadable app
Open source Closed source
License not stated License not stated
No account needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 24, 2026

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