Glances vs OpenNMS Horizon

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

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FeatureGlancesOpenNMS Horizon
CategoryMonitoring & StatusMonitoring & Status
LicenseLGPL-3.0AGPL-3.0
LanguagePythonJava
Setup difficultyEasyHard
Min. RAM128 MB4,096 MB
Deploymentdocker, bare-metal, binarydocker, bare-metal
GitHub stars★ 33,269★ 1,168
First released20122000
ReplacesDatadogSolarWinds, PRTG

Why pick each one

Choose Glances if…

  • Very easy to run
  • Lightweight
  • Good single-host overview
Glances details

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

Frequently asked questions

Is Glances or OpenNMS Horizon better?

Glances 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 Glances and OpenNMS Horizon free and open-source?

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

Can I run Glances and OpenNMS Horizon with Docker?

Glances: yes. OpenNMS Horizon: yes.

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