Nagios Core vs NetXMS
A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Nagios Core | NetXMS |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 84 · Excellent | 78 · Good |
| Category | Monitoring & Status | Monitoring & Status |
| License | GPL-2.0 | GPL-2.0 |
| Language | C | C++ |
| Setup difficulty | Hard | Hard |
| Min. RAM | 512 MB | 512 MB |
| Deployment | bare-metal, docker, source | docker, bare-metal |
| GitHub stars | ★ 2,045 | ★ 403 |
| First released | 1999 | 2004 |
| Replaces | SolarWinds, PRTG | SolarWinds, PRTG |
What are Nagios Core and NetXMS?
Nagios Core
Nagios Core is the open-source monitoring engine that watches hosts, services, and network devices, alerting when problems occur. It is highly extensible through plugins and remains a long-standing standard in IT monitoring.
- Host and service checks
- Massive plugin ecosystem
- Flexible notification rules
- Proven at scale
NetXMS
NetXMS is an open-source network and infrastructure monitoring system with auto-discovery, event correlation, and a flexible alerting engine. It scales from small networks to large distributed environments.
- Network auto-discovery
- Event correlation
- Distributed monitoring
- SNMP and agent support
Nagios Core vs NetXMS: key differences
Nagios Core is written in C, while NetXMS is built with C++. Nagios Core is the more established project (first released 1999), while NetXMS arrived in 2004. Nagios Core has the considerably larger community, at 2,045 GitHub stars versus 403.
Why pick each one
Choose Nagios Core if…
- Battle-tested and stable
- Enormous plugin library
Watch out for
- Configuration is text-file heavy
- Dated web interface
Choose NetXMS if…
- Powerful event processing
- Scales to large networks
Watch out for
- Steep learning curve
- Desktop console for full features
Frequently asked questions
Is Nagios Core or NetXMS better?
Neither is universally better. Nagios Core has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Nagios Core and NetXMS free and open-source?
Yes. Nagios Core is licensed under GPL-2.0 and NetXMS under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Nagios Core and NetXMS with Docker?
Nagios Core: yes. NetXMS: yes.