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Oh Dear vs DNS Spy: catalog facts
Oh Dear	DNS Spy
Paid Paid plans with a 10-day free trial that needs no payment details.	Freemium Monitoring is paid with a 7-day free trial; some one-off tools are free.
Web	Web
Crawls whole sites for broken links, not just the homepage Uptime, SSL, DNS and cron checks in one tool	Record-level change alerts checked from multiple locations Domain and SSL expiry tracking in one place
No permanent free plan Hosted only	Continuous monitoring requires a paid plan Hosted service only
Hosted service	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 October 2, 2026

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