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Cloudflare Radar URL Scanner vs WhatWeb: catalog facts
Cloudflare Radar URL Scanner	WhatWeb
Free Free to use.	Free Free and open source under GPLv2.
Web	Windows, macOS, Linux, Command line
Reports technologies, security and performance in one scan Nothing to install	Fingerprints hundreds of web technologies via plugins Adjustable aggression levels
Proprietary hosted service Only checks public URLs one at a time	Command-line only Intended only for authorized testing
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is 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.