There is an open source for that
Healthchecks, Cronitor, Dead Man's SnitchBack to search

Open-source cron job and scheduled task monitoring. Listens for pings, alerts when a job fails to check in on time.

Healthchecks is an open source alternative to Cronitor and Dead Man's Snitch. Open-source cron job and scheduled task monitoring. Listens for pings, alerts when a job fails to check in on time. BSD-3-Clause licensed, 10.1k GitHub stars, hosted version available, self-host with Docker, and last released 2026-07-14.

Skip it if

You want a turnkey, zero-ops service with no SMTP or database to configure: self-hosting requires PostgreSQL/MySQL, outbound SMTP, a reverse proxy for TLS, and always-running sendalerts and sendreports processes.

Watch out

The Docker image bundles the background workers but does not handle TLS termination: put it behind a reverse proxy or load balancer. Self-hosters must keep sendalerts and sendreports running and restart on crash.

Healthchecks interface screenshot
Official screenshot

"Not OP, https://healthchecks.io is great for monitoring automated tasks like backup scripts. Also has the option to immediately signal failure and send an alert: https://healthchecks.io/docs/signaling_failures/"

"I use a self-hosted healthchecks.io watchdog timer instance to monitor jobs like these and alert if they don't complete."

CadenceActive

Get started

1. Use the hosted versionHosted SaaS at healthchecks.io with a free tier; self-host on your own infrastructure is the open-source path.

No public funding page yet.

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