Cronitor
Cron job and uptime monitoring with deep schedule intelligence
What is Cronitor?
Cronitor is a developer-focused monitoring platform built around three core products: Jobs (cron job and background task monitoring), Checks (uptime and API monitoring from 12+ global locations), and Heartbeats (dead-man's-switch signals from any process or device). It instruments your existing scheduled tasks by having your jobs ping Cronitor's API on start, success, and failure, then surfaces rich telemetry including exit codes, run duration, execution logs, and schedule-aware alerts for events like "should have run but didn't," "ran too slowly," or "exited non-zero." The platform also includes hosted public and private status pages that feed directly from your monitors. Cronitor also operates crontab.guru, the widely used free cron expression editor, which reflects the team's deep investment in cron schedule tooling for the broader developer community.
Cronitor stands out for the depth of its schedule-aware analytics. It parses cron expressions natively, tracks historical execution patterns, categorizes exit codes as distinct event types, and allows you to set grace periods and performance thresholds per monitor. Alerting reaches 12+ channels including email, Slack, PagerDuty, OpsGenie, and SMS on paid plans. A CLI tool and Kubernetes agent enable auto-discovery of existing jobs, and SDKs for multiple languages reduce integration friction. Pricing is usage-based at $2 per monitor per month on the Business tier, with a free Hacker plan capped at five monitors.
Best For
- Teams that already run scheduled jobs on their own servers or cloud infrastructure and need deep observability without changing how jobs are executed
- Organizations that want to unify cron job monitoring, uptime checks, heartbeats, and status pages in one platform
- Engineering teams that need schedule-aware alerting distinguishing missed runs, slow runs, and non-zero exit codes as separate event types
- Developers using Kubernetes who want auto-discovered job monitoring via a Helm-deployable agent and the Cronitor CLI
- Teams that need 12-month data retention, execution logs, and historical performance analytics on their background tasks
Limitations
- Monitoring only — Cronitor observes and alerts on jobs you run elsewhere; it does not execute HTTP endpoints or scheduled tasks on your behalf
- No self-hosted or open-source deployment option; the service is SaaS-only, which may not suit teams with strict data residency or air-gapped requirements
- Status pages with custom branding and private pages are paid add-ons ($25/month and $50/month respectively) on top of the per-monitor usage cost
- The free plan is limited to five monitors with no SMS alerts and no premium integrations such as PagerDuty or OpsGenie
Cronitor vs CronJobPro
CronJobPro and Cronitor overlap on the monitoring side — both offer heartbeat/dead-man's-switch monitoring, uptime checks, multi-channel alerts, and public status pages. Cronitor goes deeper on observability for jobs you already run: schedule-aware analytics, exit code categorization, execution log storage, CLI auto-discovery, and 12 months of historical data make it a strong choice when your primary need is instrumenting an existing job infrastructure. CronJobPro's differentiation is on the execution side: it actually runs your HTTP-based scheduled jobs for you, so teams that want a single service to both trigger and monitor their cron workloads — without maintaining their own job runner — get that in one place. The two tools are most complementary when compared honestly: Cronitor is the stronger pick for deep monitoring of self-hosted jobs; CronJobPro is the stronger pick when you want managed execution plus monitoring together.
Official Website
https://cronitor.ioFrequently Asked Questions
What is Cronitor?
Cronitor is a developer-focused monitoring platform built around three core products: Jobs (cron job and background task monitoring), Checks (uptime and API monitoring from 12+ global locations), and Heartbeats (dead-man's-switch signals from any process or device). It instruments your existing scheduled tasks by having your jobs ping Cronitor's API on start, success, and failure, then surfaces rich telemetry including exit codes, run duration, execution logs, and schedule-aware alerts for events like "should have run but didn't," "ran too slowly," or "exited non-zero." The platform also includes hosted public and private status pages that feed directly from your monitors. Cronitor also operates crontab.guru, the widely used free cron expression editor, which reflects the team's deep investment in cron schedule tooling for the broader developer community.
What is Cronitor best for?
Teams that already run scheduled jobs on their own servers or cloud infrastructure and need deep observability without changing how jobs are executed. Organizations that want to unify cron job monitoring, uptime checks, heartbeats, and status pages in one platform. Engineering teams that need schedule-aware alerting distinguishing missed runs, slow runs, and non-zero exit codes as separate event types. Developers using Kubernetes who want auto-discovered job monitoring via a Helm-deployable agent and the Cronitor CLI. Teams that need 12-month data retention, execution logs, and historical performance analytics on their background tasks.
How does Cronitor compare to an external cron service?
CronJobPro and Cronitor overlap on the monitoring side — both offer heartbeat/dead-man's-switch monitoring, uptime checks, multi-channel alerts, and public status pages. Cronitor goes deeper on observability for jobs you already run: schedule-aware analytics, exit code categorization, execution log storage, CLI auto-discovery, and 12 months of historical data make it a strong choice when your primary need is instrumenting an existing job infrastructure. CronJobPro's differentiation is on the execution side: it actually runs your HTTP-based scheduled jobs for you, so teams that want a single service to both trigger and monitor their cron workloads — without maintaining their own job runner — get that in one place. The two tools are most complementary when compared honestly: Cronitor is the stronger pick for deep monitoring of self-hosted jobs; CronJobPro is the stronger pick when you want managed execution plus monitoring together.
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