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Oh Dear vs TrackSSL: catalog facts
Oh Dear	TrackSSL
Paid Paid plans with a 10-day free trial that needs no payment details.	Freemium Free sign-up tier with paid plans for more monitoring.
Web	Web
Crawls whole sites for broken links, not just the homepage Uptime, SSL, DNS and cron checks in one tool	Expiry alerts through email, Slack, SMS and Teams Notifies on certificate changes, useful for checking renewal automation
No permanent free plan Hosted only	Focused on certificates rather than general uptime Hosted service only
Hosted service	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	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.