Free cron job monitoring tools compared

Most cron job monitoring tools offer a free tier, but "free" covers a wide range of capability. Some free tiers are genuinely useful for small projects and solo developers. Others are limited enough to be mostly a signup path to a paid plan.

This post compares the free tiers of the most commonly used cron job monitoring tools in 2026, based on what they actually detect and what they leave uncovered.

What to look for in a free tier

Before comparing tools, it's worth being clear about what cron job monitoring should catch at a minimum:

Missed runs. Your job didn't start at all. Standard for any monitoring tool worth using.

Hung jobs. Your job started but never finished. Requires start/success ping architecture, not just a heartbeat ping.

Silent failures. Your job exited 0 but accomplished nothing useful. Requires alert rules on job output metadata — only one tool on this list offers it.

Log context on failure. When a job fails, the error should arrive in the alert — not require logging into a separate system.

Healthchecks.io — free tier

Free tier: 20 monitors, 3 months of log history, unlimited integrations.

The most generous free tier in this category. Supports start/finish pings for hung job detection, cron expression parsing, and a wide range of alert integrations including Slack, Discord, PagerDuty, email, and webhooks — all on the free tier.

The codebase is open source (BSD licensed) and self-hostable, which is a meaningful advantage if you prefer to keep monitoring data inside your own infrastructure.

What the free tier doesn't include: no log attachment on failure (you see that a job failed, not why), no alert rules on job output metadata, no duration anomaly detection.

Best for: developers who need reliable heartbeat monitoring for up to 20 jobs and want the most generous free tier in the category.

Dead Man's Snitch — free tier

Free tier: Available but limited — start pings for hung job detection require a paid plan.

Dead Man's Snitch offers the simplest possible setup: one ping URL per job, curl it at the end. If the ping doesn't arrive, you get alerted. The free tier covers this basic use case.

The limitation: without start pings (paid only), you can't detect hung jobs. A job that starts but never finishes looks identical to a job that never started — both produce an absent ping. You only know something went wrong, not whether the job started.

No log attachment, no output metadata rules.

Best for: simple projects where ease of setup is the priority and hung job detection is not required.

Cronitor — free tier

Free tier: 5 monitors, email and Slack alerts, 1 month of data retention.

Cronitor is the most feature-complete cron monitoring platform. The paid plans are comprehensive: log capture, performance dashboards, Terraform provider, multiple SDK integrations, uptime monitoring, and status pages.

The free tier covers the basics — missed runs and hung jobs for up to 5 monitors. No log capture on the free tier. No output metadata rules on any tier.

Best for: teams evaluating Cronitor for its paid features who need a trial period, or solo developers who need monitoring for 5 or fewer jobs.

Crontify — free tier

Free tier: 5 monitors, email alerts, 14 days of run history, 1 alert rule per monitor.

Crontify covers missed runs and hung jobs on the free tier. What makes it different is alert rules on job output metadata — available on the free tier with 1 rule per monitor.

This means you can define rows_processed eq 0 as an alert condition on a free plan. When your sync job exits 0 but processes nothing, Crontify fires an alert. Healthchecks.io, Cronitor, and Dead Man's Snitch don't offer this at any price tier under a comparable model.

The 14-day run history is shorter than Healthchecks.io's 3 months. The 5-monitor free tier matches Cronitor and is less generous than Healthchecks.io's 20.

Best for: developers whose jobs process data and can't rely on exit codes alone. If you've been burned by a job that silently processed nothing, the alert rules feature makes the smaller free tier worth it.

Comparison table

Which free tier to choose

You need to monitor more than 5 jobs for free: Healthchecks.io. Its 20-monitor free tier is unmatched in the category, and its feature set for basic monitoring is solid.

You need the absolute simplest setup: Dead Man's Snitch. One URL, one curl. Nothing to configure.

Your jobs process data and zero output is a meaningful failure: Crontify. The 1-alert-rule-per-monitor on the free tier is enough to detect the most important silent failure condition for each job.

You want to evaluate a full-featured platform before paying: Cronitor. The paid features (log capture, dashboards, Terraform) are genuinely differentiated, and the free tier is enough to assess the product.

The honest answer for most solo developers starting out: use Crontify when you need alert rules on job output. You get this feature, even on the free tier.