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WhatCMS vs BuiltWith: catalog facts
WhatCMS	BuiltWith
Free Checking a single URL on the website is free; reports and batch detection are separate…	Freemium Free single-site lookups with paid plans for reports and bulk data.
Web	Web, Browser extension
Detects about 1,540 website technologies Reports framework, language, hosting and CDN alongside the CMS	Identifies CMS, analytics, CDN and hosting from a single domain Free lookups for individual sites
Detection relies on visible artifacts and can miss customised sites Lead generation features go beyond simple site checks	Detailed reports and bulk data require paid plans Detection is inference-based and can miss or misreport technologies
Web application	Hosted service, 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.