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Oh Dear vs Domain Locker: catalog facts
Oh Dear	Domain Locker
Paid Paid plans with a 10-day free trial that needs no payment details.	Free Open source under MIT for self-hosting; hosted pricing is not stated in the research.
Web	Web, Self-hosted
Crawls whole sites for broken links, not just the homepage Uptime, SSL, DNS and cron checks in one tool	Tracks domains from many registrars in one place Expiry and change alerts through many channels
No permanent free plan Hosted only	Most useful only for people managing several domains Some features such as widgets are listed as coming soon
Hosted service	Self-hosted, Hosted service
Closed source	Open source
License not stated	License: MIT
Account needed	Not stated if an account is 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 October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.