Compare software

WhatWebWhatCMS
Free

Free and open source under GPLv2.

 Free

Checking a single URL on the website is free; reports and batch detection are separate…

Windows, macOS, Linux, Command line Web
  • Fingerprints hundreds of web technologies via plugins
  • Adjustable aggression levels
  • Detects about 1,540 website technologies
  • Reports framework, language, hosting and CDN alongside the CMS
  • Command-line only
  • Intended only for authorized testing
  • Detection relies on visible artifacts and can miss customised sites
  • Lead generation features go beyond simple site checks
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

Checked September 24, 2026

Checked September 23, 2026

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