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LighthouseSiteOne Crawler
Free

The open-source tool is available without a license fee.

 Free

Free and open source.

Windows, macOS, Linux, Web, Command line Windows, macOS, Linux, Command line
  • Turns vague performance complaints into a specific, prioritised list
  • Runs in CI as well as in the browser, so regressions can be caught
  • Broad audit covering SEO, security, accessibility and performance
  • Both a desktop GUI and a scriptable CLI
  • Scores vary between runs and depend heavily on the machine and network
  • A good score is not the same as a fast experience for real users
  • The large number of CLI options takes time to learn
  • Crawling large sites can put load on the target server
Downloadable app Downloadable app
Open source Open source
License: Apache-2.0 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 September 22, 2026

Checked September 24, 2026

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