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SiteOne Crawler vs Lighthouse: catalog facts
SiteOne Crawler	Lighthouse
Free Free and open source.	Free The open-source tool is available without a license fee.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Web, Command line
Broad audit covering SEO, security, accessibility and performance Both a desktop GUI and a scriptable CLI	Turns vague performance complaints into a specific, prioritised list Runs in CI as well as in the browser, so regressions can be caught
The large number of CLI options takes time to learn Crawling large sites can put load on the target server	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
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 22, 2026

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