Checkmk vs LibreNMS
A side-by-side comparison of two self-hosted monitoring & status options — licensing, setup difficulty, resource needs, and what each one replaces.
Checkmk
Comprehensive IT infrastructure monitoring
VS
LibreNMS
Auto-discovering network monitoring system
| Feature | Checkmk | LibreNMS |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 83 · Excellent | 89 · Excellent |
| Category | Monitoring & Status | Monitoring & Status |
| License | GPL-2.0 | GPL-3.0 |
| Language | Python | PHP |
| Setup difficulty | Medium | Medium |
| Min. RAM | 1,024 MB | 1,024 MB |
| Deployment | docker, bare-metal | docker, bare-metal |
| GitHub stars | ★ 2,374 | ★ 4,903 |
| First released | 2009 | 2013 |
| Replaces | Nagios, Datadog | Nagios |
What are Checkmk and LibreNMS?
Checkmk
Checkmk is an IT monitoring system for servers, networks, applications, and cloud, known for auto-discovery and rule-based configuration. It targets IT teams monitoring sizeable environments. It is deployed via Docker or native packages.
- Powerful service auto-discovery
- Rule-based configuration
- Agent-based and SNMP checks
- Built-in dashboards
LibreNMS
LibreNMS is a fully featured network monitoring system with auto-discovery, alerting, and broad device support over SNMP. It targets network administrators monitoring many devices. It is deployed via Docker or a LAMP stack.
- Automatic network discovery
- Broad vendor and SNMP support
- Alerting and billing
- Distributed polling
Checkmk vs LibreNMS: key differences
Checkmk is written in Python, while LibreNMS is built with PHP. Licensing differs — GPL-2.0 for Checkmk versus GPL-3.0 for LibreNMS. Checkmk is the more established project (first released 2009), while LibreNMS arrived in 2013. LibreNMS has the considerably larger community, at 4,903 GitHub stars versus 2,374.
Why pick each one
Choose Checkmk if…
- Strong auto-discovery
- Scales well
- Good defaults
Watch out for
- Enterprise edition gates features
- Concepts take time to learn
Choose LibreNMS if…
- Great for network devices
- Strong auto-discovery
- Active community
Watch out for
- Network-focused
- Setup takes effort
Frequently asked questions
Is Checkmk or LibreNMS better?
Neither is universally better. LibreNMS has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Checkmk and LibreNMS free and open-source?
Yes. Checkmk is licensed under GPL-2.0 and LibreNMS under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Checkmk and LibreNMS with Docker?
Checkmk: yes. LibreNMS: yes.