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WhatWeb vs Cloudflare Radar URL Scanner: catalog facts
WhatWeb	Cloudflare Radar URL Scanner
Free Free and open source under GPLv2.	Free Free to use.
Windows, macOS, Linux, Command line	Web
Fingerprints hundreds of web technologies via plugins Adjustable aggression levels	Reports technologies, security and performance in one scan Nothing to install
Command-line only Intended only for authorized testing	Proprietary hosted service Only checks public URLs one at a time
Downloadable app	Web application
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	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.