Healthchecks.io

Healthchecks.io is an open source service that alerts you when a scheduled job does not run on time. It is built for cron jobs, backups, workers and other background tasks.

For each job, you create a check and receive a unique ping URL. The job sends a request to that URL each time it runs. If the pings stop, Healthchecks.io moves the check from up to late and then to down, and it sends you a notification. Each check has a period and a grace time, and you can also use a cron expression for the schedule. Logs show received pings and sent alerts.

• A unique ping URL for each job
• Alerts when a job runs late or stops
• Period and grace time settings per check
• Cron expression schedules
• Public status badges for tags

System administrators, developers and small teams that rely on nightly backups, reports or scheduled scripts. It is useful any time a silent failure would be costly.

The project is open source under the BSD-3-Clause license, and you can self-host it. The hosted service is free for up to 20 cron jobs and offers paid plans for more. Add a short grace time, but not a long one, so that you hear about real problems quickly.