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BuiltWith vs Netcraft Site Report: catalog facts
BuiltWith	Netcraft Site Report
Freemium Free single-site lookups with paid plans for reports and bulk data.	Free Free to use under Netcraft's fair use policy.
Web, Browser extension	Web
Identifies CMS, analytics, CDN and hosting from a single domain Free lookups for individual sites	Shows hosting, server and technology details in one report Includes hosting history and certificate details
Detailed reports and bulk data require paid plans Detection is inference-based and can miss or misreport technologies	Subject to a fair use policy Some features may not work in older browsers
Hosted service, Browser extension	Web application
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.