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Netcraft Site Report vs W3Techs Site Info: catalog facts
Netcraft Site Report	W3Techs Site Info
Free Free to use under Netcraft's fair use policy.	Free The website lookup, bookmarklet and extensions are free to use; a separate API is offered.
Web	Web, Browser extension
Shows hosting, server and technology details in one report Includes hosting history and certificate details	Identifies CMS, language, web server and hosting provider Bookmarklet and Firefox and Chrome extensions for the current page
Subject to a fair use policy Some features may not work in older browsers	Shows only what can be detected from outside the site Website carries advertising
Web application	Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	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.