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WhatWeb vs HackerTarget WhatWeb Scan: catalog facts
WhatWeb	HackerTarget WhatWeb Scan
Free Free and open source under GPLv2.	Freemium Free analysis reports are offered, with paid plans for more scanning.
Windows, macOS, Linux, Command line	Web
Fingerprints hundreds of web technologies via plugins Adjustable aggression levels	Runs WhatWeb and Wappalyzer without a local install Detects applications, web servers and other technologies
Command-line only Intended only for authorized testing	Intended for authorized testing of sites you own or may assess Heavier use sits behind paid plans
Downloadable app	Web application
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	No account 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.