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Netcraft Site Report vs WhatWeb: catalog facts
Netcraft Site Report	WhatWeb
Free Free to use under Netcraft's fair use policy.	Free Free and open source under GPLv2.
Web	Windows, macOS, Linux, Command line
Shows hosting, server and technology details in one report Includes hosting history and certificate details	Fingerprints hundreds of web technologies via plugins Adjustable aggression levels
Subject to a fair use policy Some features may not work in older browsers	Command-line only Intended only for authorized testing
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
No account needed	No account needed
Needs internet	Works offline
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.