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Web Check vs Netcraft Site Report: catalog facts
Web Check	Netcraft Site Report
Free Free and open source.	Free Free to use under Netcraft's fair use policy.
Web, Self-hosted	Web
Many checks combined in one report Can be self-hosted with Docker	Shows hosting, server and technology details in one report Includes hosting history and certificate details
Running it yourself takes some setup Only looks at publicly available information	Subject to a fair use policy Some features may not work in older browsers
Self-hosted	Web application
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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