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Cronitor vs Zabbix

Cronitor logo

Cronitor

Logging

Monitoring for cron jobs, websites, and background tasks

From
Free
Rated
-
Full reviewWebsite
Zabbix logo

Zabbix

Networking

Open source infrastructure and network monitoring with distributed proxies and templating

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; Zabbix the database is the scaling limit, and high frequency polling grows history tables fast enough that untuned installations hit housekeeping stalls and query timeouts within months.
  • They diverge on capability: Cronitor covers Cron job monitoring, Zabbix covers Agent and agentless collection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Cronitor and Zabbix actually diverge.

Attributes where Cronitor and Zabbix differ
AttributeCronitorZabbix
Pricing modelPay-per-monitor plus user seatsOpen source, no licence fee
PlatformsWeb, APILinux, Docker, Kubernetes, Web
CategoryLoggingNetworking
Founded2014Unknown

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 Zabbix

  • Agent and agentless collection
  • Templates
  • Low-level discovery
  • Distributed proxies
  • Trigger expressions
  • Escalation actions

What people use each for

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

Cronitor

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

Zabbix

  • A service provider monitoring thousands of customer devices where per-device commercial licensing is the largest line itemnot Cronitor
  • Branch or industrial sites with unreliable links that need local collection and bufferingnot Cronitor
  • Mixed estates where the same tool must poll SNMP switches, Linux hosts, Windows servers and Java applicationsnot Cronitor
  • Replacing an aging Nagios installation while keeping script-based checks that already existnot 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

Zabbix

  • The database is the scaling limit, and high frequency polling grows history tables fast enough that untuned installations hit housekeeping stalls and query timeouts within months.
  • Initial configuration is heavy; getting useful alerting rather than noise requires understanding trigger expressions, macros and template inheritance, which is a multi-week learning curve for a team new to it.
  • The AGPLv3 change at version 7.0 affects anyone offering Zabbix over a network as part of a commercial service, and that obligation is easy to inherit accidentally during an upgrade.
  • The web interface is functional rather than pleasant, and many sites end up running Grafana alongside it purely for presentation, which is a second system to maintain.
  • Upgrades between major versions touch the database schema and can take hours on large history tables, so the maintenance window is proportional to how much data you kept.

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

Zabbix

Free
  • ZabbixFree
    • No device, node or metric limits
    • Full feature set with no paid edition of the software
    • AGPLv3 from version 7.0 onward
  • Zabbix Technical Support$undefined/year
    • Tiered subscriptions with defined response times
    • Access to Zabbix engineers for configuration and performance issues
    • Bug fix priority and backports

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 Zabbix if

  • You need agent and agentless collection.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes, Web.
  • You also want templates.
Zabbix review

Questions people ask

Is Cronitor or Zabbix better?
Neither clearly leads. Cronitor starts at Free and Zabbix at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cronitor or Zabbix?
Cronitor starts at Free and Zabbix at Free.
Does Cronitor or Zabbix run on more platforms?
Cronitor runs on Web, API. Zabbix runs on Linux, Docker, Kubernetes, Web.
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 Zabbix is typically brought in for.
What can Cronitor do that Zabbix cannot?
Cronitor covers Cron job monitoring, Uptime and performance checks, Heartbeat monitoring, Status pages. Zabbix covers Agent and agentless collection, Templates, Low-level discovery, Distributed proxies.

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
Zabbix: Is Zabbix genuinely free for commercial use?

The software has no licence fee at any scale. From version 7.0 it is AGPLv3, so offering it as a network service to third parties carries source distribution obligations.

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
Zabbix: What is the real cost of running it?

Database administration and the person who tunes it. Budget for PostgreSQL with TimescaleDB and someone who owns the retention policy.

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
Zabbix: How does it compare to a commercial per-device tool?

It removes the licence line entirely and adds an operations line. Below a few hundred devices the commercial tool is often cheaper in total; above that Zabbix wins clearly.

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