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BuiltWith vs W3Techs Site Info: catalog facts
BuiltWith	W3Techs Site Info
Freemium Free single-site lookups with paid plans for reports and bulk data.	Free The website lookup, bookmarklet and extensions are free to use; a separate API is offered.
Web, Browser extension	Web, Browser extension
Identifies CMS, analytics, CDN and hosting from a single domain Free lookups for individual sites	Identifies CMS, language, web server and hosting provider Bookmarklet and Firefox and Chrome extensions for the current page
Detailed reports and bulk data require paid plans Detection is inference-based and can miss or misreport technologies	Shows only what can be detected from outside the site Website carries advertising
Hosted service, Browser extension	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.