Compare software

Webbkoll vs Blacklight: catalog facts
Webbkoll	Blacklight
Free Free to use, run by a non-profit foundation.	Free Free to use, run by a donation-supported newsroom.
Web	Web
Covers cookies, third parties, HTTPS and security headers in one report Checks HTTP to HTTPS redirects	Detects fingerprinting, session recording and keystroke capture Names data flows to major platforms
Some sites fail to scan correctly Simulates a single default browser visit	Scans a single page per run Cached results may be shown unless a fresh scan is forced
Web application	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.