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Netcraft Site Report vs WhatRuns: catalog facts
Netcraft Site Report	WhatRuns
Free Free to use under Netcraft's fair use policy.	Free Free extension with no sign-up required.
Web	Browser extension
Shows hosting, server and technology details in one report Includes hosting history and certificate details	One-click technology detection Covers plugins, fonts, analytics and CDNs
Subject to a fair use policy Some features may not work in older browsers	Proprietary Only a Chrome version is mentioned
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 24, 2026

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