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Cloudflare Radar URL Scanner vs Lookyloo: catalog facts
Cloudflare Radar URL Scanner	Lookyloo
Free Free to use.	Free Free and open source, with a free public instance run by CIRCL.
Web	Web, Self-hosted
Reports technologies, security and performance in one scan Nothing to install	Maps redirects and every loaded resource Can capture through Tor, I2P or proxies in several countries
Proprietary hosted service Only checks public URLs one at a time	Public instance captures are visible to its administrators Aimed at analysts rather than casual users
Web application	Web application, Self-hosted
Closed source	Open source
License not stated	License: BSD-3-Clause
Not stated if an account is 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 24, 2026

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