Compare software

SEOnautSiteOne Crawler
Free

Free and open source with no paid tier.

 Free

Free and open source.

Web, Self-hosted Windows, macOS, Linux, Command line
  • Self-hosted, so crawl data stays on your server
  • Docker Compose setup
  • Broad audit covering SEO, security, accessibility and performance
  • Both a desktop GUI and a scriptable CLI
  • Focused on technical audits, with no keyword or backlink data
  • Requires running and maintaining your own server
  • The large number of CLI options takes time to learn
  • Crawling large sites can put load on the target server
Self-hosted Downloadable app
Open source Open source
License: MIT License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked September 24, 2026

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