Checkmk is an open-source IT monitoring system for infrastructure and applications across physical, virtual, container and cloud environments.
2.6K577PythonGPL-2.0Updated 9 hours ago
1 alternative
Best open-source alternatives to Nagios (2026)
Looking for a free, open-source alternative to Nagios? These 1 projects can replace it. Each one passed our quality screening and is explained in plain words, so you can compare stars, license and maintenance at a glance.
Quick comparison
| Project | Stars | License | Last commit |
|---|---|---|---|
| Checkmk/checkmk | ★ 2.6K | GPL-2.0 | 9 hours ago |
FAQ
- Is there a free, open-source alternative to Nagios?
- Yes. The most popular open-source alternatives to Nagios on Repolode are checkmk.
- Which Nagios alternative should I choose?
- checkmk has the most GitHub stars and is released under GPL-2.0. Compare the license and last commit of each option in the table above before choosing.