Zabbix vs Nagios
Side-by-side from the Top 11 ranking of The 11 Best IT Infrastructure Monitoring Software Tools. Last verified June 19, 2026.
The short answer
Zabbix ranks higher on Top 11 (#7 vs #10) for IT teams monitoring server uptime, network health, and application performance. The most powerful and flexible free, open-source monitoring tool.
At a glance
| Zabbix | Nagios | |
|---|---|---|
| Top 11 rank | #7 / The 11 Best IT Infrastructure Monitoring Software Tools | #10 / The 11 Best IT Infrastructure Monitoring Software Tools |
| Score (out of 9.4) | 7.9 | 7.3 |
| Best for | Powerful open-source monitoring | Extensible open-source engine |
| Pricing | $ (Free, paid support) | $ (Free, paid edition) |
| HQ | Riga, Latvia | Saint Paul, USA |
| Founded | 2001 | 1999 |
Zabbix
The most powerful and flexible free, open-source monitoring tool.
www.zabbix.com/See full entry in The 11 Best IT Infrastructure Monitoring Software Tools
Nagios
Monitors anything thanks to a huge library of community plugins.
www.nagios.com/See full entry in The 11 Best IT Infrastructure Monitoring Software Tools
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.