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ImmuniWeb SSL Security Test vs SSLyze: catalog facts
ImmuniWeb SSL Security Test	SSLyze
Free The test is free; ImmuniWeb also sells commercial security services.	Free Free and open source.
Web	Command line
Tests email servers as well as web servers Compliance checks for PCI DSS, HIPAA and NIST	Fast TLS configuration scanning from the command line JSON output suited to automation
Provided as is without warranty Only tests servers reachable from the internet	No graphical interface Output assumes some knowledge of TLS
Web application	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Needs internet	Not stated if it works offline
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.