Healthchecks.io

Cron job and background task monitoring service that alerts when scheduled jobs, nightly backups, or periodic tasks do not run on time. Jobs ping the service when they complete successfully; if a ping is missing within the expected window, it sends notifications so silent failures are detected early.

Open-source and written in Python with Django. Trusted by thousands of developers and teams who rely on it for cron jobs, systemd timers, CI workflows, Kubernetes CronJobs, and data pipelines. Stands out for simplicity: minimal configuration, no agents to run, and a straightforward ping-based model that works with any scheduler.

Key features:

• Configurable period and grace time per check, plus optional cron expression support
• Live-updating dashboard with tags and status badges for READMEs or status pages
• Integrations for Slack, Discord, PagerDuty, Opsgenie, email, webhooks, and Prometheus
• Self-hostable: run your own instance or use the hosted service
• API and webhook support for programmatic check creation and custom alerting

Engineers use it to monitor nightly backups, SSL renewals, database replication, report generation, and any scheduled or cron-like workload. Fits well with GitHub Actions, Jenkins, Heroku Scheduler, systemd timers, and Kubernetes CronJobs: add a single HTTP ping at the end of the job to report success.