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W3Techs Site Info vs HackerTarget WhatWeb Scan: catalog facts
W3Techs Site Info	HackerTarget WhatWeb Scan
Free The website lookup, bookmarklet and extensions are free to use; a separate API is offered.	Freemium Free analysis reports are offered, with paid plans for more scanning.
Web, Browser extension	Web
Identifies CMS, language, web server and hosting provider Bookmarklet and Firefox and Chrome extensions for the current page	Runs WhatWeb and Wappalyzer without a local install Detects applications, web servers and other technologies
Shows only what can be detected from outside the site Website carries advertising	Intended for authorized testing of sites you own or may assess Heavier use sits behind paid plans
Web application, Browser extension	Web application
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 23, 2026

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