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ImmuniWeb SSL Security Test vs DigiCert SSL Installation Checker: catalog facts
ImmuniWeb SSL Security Test	DigiCert SSL Installation Checker
Free The test is free; ImmuniWeb also sells commercial security services.	Free Free to use; DigiCert sells certificates.
Web	Web
Tests email servers as well as web servers Compliance checks for PCI DSS, HIPAA and NIST	Diagnoses installation and chain problems Related CSR and S/MIME tools on the same site
Provided as is without warranty Only tests servers reachable from the internet	Focused on installation rather than a full protocol audit Surrounded by a certificate vendor's sales pages
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.