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Heartbeat monitors compared: Did It Run?, Healthchecks.io, Cronitor, Dead Man's Snitch, UptimeRobot
All five do the same core thing: your job checks in (pings a URL) when it runs, and you're alerted when a check-in doesn't arrive on schedule. The differences are who they're built for and what they check beyond "a ping arrived".
A Healthchecks.io alternative built for agents and no-code automations
Did It Run? and Healthchecks.io side by side.