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Checkly vs Oh Dear: catalog facts
Checkly	Oh Dear
Freemium Free to start, with paid plans for larger use.	Paid Paid plans with a 10-day free trial that needs no payment details.
Web, Command line	Web
Monitors defined as code and kept in version control Uses standard Playwright for browser checks	Crawls whole sites for broken links, not just the homepage Uptime, SSL, DNS and cron checks in one tool
Requires writing code, so less suited to non-developers Checks run on Checkly's hosted infrastructure	No permanent free plan Hosted only
Downloadable app, 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 September 23, 2026

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