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ImmuniWeb SSL Security Test vs GF.dev TLS Cipher Suite Scanner: catalog facts
ImmuniWeb SSL Security Test	GF.dev TLS Cipher Suite Scanner
Free The test is free; ImmuniWeb also sells commercial security services.	Free Free to use in the browser.
Web	Web
Tests email servers as well as web servers Compliance checks for PCI DSS, HIPAA and NIST	Quick check of the negotiated TLS version and cipher suite Nothing to install
Provided as is without warranty Only tests servers reachable from the internet	Reports the negotiated suite rather than a full list of supported ciphers Only checks servers reachable from the internet
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is 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.