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WhatRuns vs WhatCMS: catalog facts
WhatRuns	WhatCMS
Free Free extension with no sign-up required.	Free Checking a single URL on the website is free; reports and batch detection are separate…
Browser extension	Web
One-click technology detection Covers plugins, fonts, analytics and CDNs	Detects about 1,540 website technologies Reports framework, language, hosting and CDN alongside the CMS
Proprietary Only a Chrome version is mentioned	Detection relies on visible artifacts and can miss customised sites Lead generation features go beyond simple site checks
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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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