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Logging · head to head

Cronitor vs Prometheus

Cronitor logo

Cronitor

Logging

Monitoring for cron jobs, websites, and background tasks

From
Free
Rated
-
Full reviewWebsite
Prometheus logo

Prometheus

Networking

Open source monitoring and alerting toolkit for cloud native environments

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Cronitor free tier limited to 5 monitors, limiting viability for small teams; Prometheus not suitable for per-request billing as collected data lacks 100% accuracy
  • They diverge on capability: Cronitor covers Cron job monitoring, Prometheus covers Multi-dimensional Data Model.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Cronitor and Prometheus actually diverge.

Attributes where Cronitor and Prometheus differ
AttributeCronitorPrometheus
Pricing modelPay-per-monitor plus user seatsopen-source
PlatformsWeb, APILinux, macOS, Windows
CategoryLoggingNetworking
Founded20142015

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Cronitor

  • Cron job monitoring
  • Uptime and performance checks
  • Heartbeat monitoring
  • Status pages
  • Real-user monitoring
  • Alert integrations
  • Email reports

Only in Prometheus

  • Multi-dimensional Data Model
  • PromQL Query Language
  • Pull-based Collection
  • Service Discovery
  • Alerting Rules
  • Federation
  • Local Storage
  • Grafana

What people use each for

The jobs each tool is most often brought in to do.

Cronitor

  • Monitoring scheduled cron jobs and background tasksnot Prometheus
  • Tracking website and API uptime with global checksnot Prometheus
  • Alerting teams when critical jobs fail to executenot Prometheus
  • Communicating service status to customersnot Prometheus

Prometheus

  • Monitoring and alerting systemnot Cronitor
  • Time-series databasenot Cronitor
  • Infrastructure metrics collectionnot Cronitor

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Cronitor

  • Free tier limited to 5 monitors, limiting viability for small teams
  • Pay-per-monitor pricing scales quickly with infrastructure size
  • Requires integrating ping calls into existing jobs
  • Limited to monitoring jobs that can send pings
  • No built-in workflow orchestration or task scheduling

Prometheus

  • Not suitable for per-request billing as collected data lacks 100% accuracy
  • Hard limit on scrape body size; large responses cause scrape failure
  • Per-scrape sample limit enforced; exceeding limit marks targets as failed
  • Not designed for long-term durable storage; optimised for metrics collection

Pricing, plan by plan

Cronitor

Free
  • HackerFree
    • 5 monitors
    • Email and Slack alerts
    • Basic status page
  • Business$2/monitor/month
    • Unlimited monitors
    • 30-second check frequency
    • 10 alert integrations
  • Enterprise$6000/year
    • Custom features and integrations
    • 5-second check frequency
    • Dedicated engineer

Prometheus

Free
  • Prometheus (Open Source)Free
    • 100% open source
    • Community-driven project
    • Apache 2 License

Which should you pick?

Choose Cronitor if

  • You need cron job monitoring.
  • You want to start without paying.
  • You work on Web, API.
  • You also want uptime and performance checks.
Cronitor review

Choose Prometheus if

  • You need multi-dimensional data model.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want promql query language.
Prometheus review

Questions people ask

Is Cronitor or Prometheus better?
Neither clearly leads. Cronitor starts at Free and Prometheus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cronitor or Prometheus?
Cronitor starts at Free and Prometheus at Free.
Does Cronitor or Prometheus run on more platforms?
Cronitor runs on Web, API. Prometheus runs on Linux, macOS, Windows.
Can I use Cronitor for free?
Both have a free tier, so you can try either at no cost before committing.
What is Cronitor best used for?
Cronitor is most often used for monitoring scheduled cron jobs and background tasks, tracking website and api uptime with global checks, alerting teams when critical jobs fail to execute, communicating service status to customers. Of those, monitoring scheduled cron jobs and background tasks and tracking website and api uptime with global checks are not what Prometheus is typically brought in for.
What can Cronitor do that Prometheus cannot?
Cronitor covers Cron job monitoring, Uptime and performance checks, Heartbeat monitoring, Status pages. Prometheus covers Multi-dimensional Data Model, PromQL Query Language, Pull-based Collection, Service Discovery.

Answered from the vendors’ own pages

Cronitor: How does Cronitor billing work for the Business plan?

Business plan costs $2 per monitor per month plus $5 per user per month, billed monthly based on actual usage.

Source
Prometheus: What does Prometheus cost?

Prometheus is completely free and open source. There are no pricing tiers or paid plans. The entire project is licensed under Apache 2 and hosted on GitHub.

Source
Cronitor: What is the difference between Hacker and Business plans?

Hacker plan ($0/month) includes 5 monitors and basic Slack/email alerts. Business plan ($2/monitor/month) offers unlimited monitors, 30-second checks, 10 integrations, 12-month retention, and email reports.

Source
Prometheus: Is Prometheus commercial software or free?

Prometheus is 100% open source and community-driven. It is a CNCF graduated project with no commercial restrictions or licensing fees.

Source
Cronitor: Does Cronitor offer a free trial?

Yes, Cronitor provides a 14-day free trial on the Business plan without requiring a credit card.

Source
Prometheus: How is Prometheus licensed?

Prometheus is licensed under the Apache 2 License, which permits free use, modification, and distribution for commercial and non-commercial purposes.

Source
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