OpenNMS Horizon vs Uptime Kuma

A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.

Not the right match-up?
FeatureOpenNMS HorizonUptime Kuma
CategoryMonitoring & StatusMonitoring & Status
LicenseAGPL-3.0MIT
LanguageJavaJavaScript
Setup difficultyHardEasy
Min. RAM4,096 MB256 MB
Deploymentdocker, bare-metaldocker
GitHub stars★ 1,168★ 89,960
First released20002021
ReplacesSolarWinds, PRTGPingdom, UptimeRobot

Why pick each one

Choose OpenNMS Horizon if…

  • Released under the AGPL-3.0 license
  • First-class Docker support for quick deployment
  • Active community (1.2k GitHub stars)
  • Written in Java
OpenNMS Horizon details

Choose Uptime Kuma if…

  • Very easy to use
  • Great notifications
  • Lightweight
Uptime Kuma details

Frequently asked questions

Is OpenNMS Horizon or Uptime Kuma better?

Uptime Kuma is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider OpenNMS Horizon if its specific feature set fits your needs better.

Are OpenNMS Horizon and Uptime Kuma free and open-source?

Yes. OpenNMS Horizon is licensed under AGPL-3.0 and Uptime Kuma under MIT. Both can be self-hosted at no software cost.

Can I run OpenNMS Horizon and Uptime Kuma with Docker?

OpenNMS Horizon: yes. Uptime Kuma: yes.

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