Checkmk - Best-in-class infrastructure & application monitoring
Agent and SNMP monitoring with automatic service discovery, in the GPL Raw edition.
alternatives to
PRTG Network Monitor
Commercial infrastructure and network monitoring software for Windows, licensed by the number of sensors. A closed product from Paessler.
Side by side
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| Checkmk | Full replacement | 2.4k | GPL-2.0 | Open source | Yes | Python | v2.5.0p15 | 2026-10-06 |
| Icinga | Full replacement | 2.2k | GPL-3.0 | Open source | Yes | C++ | v2.16.5 | 2026-10-06 |
| LibreNMS | Partial | 4.9k | Other | Open source | Yes | PHP | 26.9.1.1 | 2026-10-06 |
| Nagios Core | Partial | 2k | GPL-2.0 | Open source | Yes | C | nagios-4.5.14 | 2026-08-07 |
Every alternative
4 alternatives
The core of our monitoring platform with a powerful configuration language and REST API.
Host and service checks with Nagios-compatible plugins, notifications and a web UI.
Community-based GPL-licensed network monitoring system
Network devices and servers over SNMP, without PRTG's range of application sensors.
Nagios Core
Host and service checks with plugins and notifications, with a basic CGI web UI.
- Language
- C
- Licence
- GPL-2.0
- Stars
- 2k
- Latest
- nagios-4.5.14
- Last push
- 2026-08-07
Head to head
About PRTG Network Monitor
- Vendor
- Paessler