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Cert Spotter vs Hardenize: catalog facts
Cert Spotter	Hardenize
Paid Paid monitoring service with a 30-day free trial.	Freemium The public report is free; continuous monitoring is a paid service.
Web	Web
Alerts on any newly issued certificate for your domains via Certificate Transparency logs Catches expired, revoked and misinstalled certificates	Free public configuration report for any domain Continuous certificate and perimeter monitoring for organisations
Paid after the 30-day trial Hosted service only	Monitoring features are aimed at organisations rather than individuals Little public detail about pricing
Web application, Hosted service	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
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.