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WhatRuns vs Netcraft Site Report: catalog facts
WhatRuns	Netcraft Site Report
Free Free extension with no sign-up required.	Free Free to use under Netcraft's fair use policy.
Browser extension	Web
One-click technology detection Covers plugins, fonts, analytics and CDNs	Shows hosting, server and technology details in one report Includes hosting history and certificate details
Proprietary Only a Chrome version is mentioned	Subject to a fair use policy Some features may not work in older browsers
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.