Compare software

ImmuniWeb SSL Security Test vs CheckTLS: catalog facts
ImmuniWeb SSL Security Test	CheckTLS
Free The test is free; ImmuniWeb also sells commercial security services.	Freemium Basic tests are available to visitors; batch, monitoring and other features need a paid…
Web	Web
Tests email servers as well as web servers Compliance checks for PCI DSS, HIPAA and NIST	Shows the full SMTP conversation step by step Tests TLS without sending a real email
Provided as is without warranty Only tests servers reachable from the internet	Cluttered interface with many menus Advanced features require a subscription
Web application	Web application, Hosted service
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.