Nagios Core vs Observium
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?
Nagios Core
Industry classic host and service monitoring engine
VS
Observium
Auto-discovering network monitoring platform
| Feature | Nagios Core | Observium |
|---|---|---|
| Category | Monitoring & Status | Monitoring & Status |
| License | GPL-2.0 | GPL-3.0 |
| Language | C | Shell |
| Setup difficulty | Hard | Medium |
| Min. RAM | 512 MB | 1,024 MB |
| Deployment | bare-metal, docker, source | bare-metal, source |
| GitHub stars | ★ 2,037 | ★ 1 |
| First released | 1999 | 2010 |
| Replaces | SolarWinds, PRTG | SolarWinds, PRTG |
Why pick each one
Frequently asked questions
Is Nagios Core or Observium better?
Neither is universally better. Nagios Core has the larger community, while Observium is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Nagios Core and Observium free and open-source?
Yes. Nagios Core is licensed under GPL-2.0 and Observium under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Nagios Core and Observium with Docker?
Nagios Core: yes. Observium: check the project docs for container support.