Checkmk

Checkmk
DevelopersCheckmk GmbH (previously tribe29 GmbH and Mathias Kettner GmbH)
Initial release2008 (2008)
Stable release
2.4 / May 6, 2025 (2025-05-06)
Written inPython, C++
Operating systemLinux
TypeIT infrastructure monitoring
LicenseGNU GPL v2 and other open-source licenses; Checkmk Enterprise License
Websitecheckmk.com
Repository

Checkmk is an open-source IT infrastructure monitoring software system developed in Python and C++. It originated as an extension to Nagios and has since evolved into a self-contained monitoring platform.

The software is available in four editions: an open-source edition (Checkmk Raw Edition), a commercial enterprise edition (Checkmk Enterprise Edition), a commercial cloud-focused edition (Checkmk Cloud Edition), and an edition for managed services providers (Checkmk Managed Services Edition).