Complex monitoring tool with great ability to extend and customize ;)

Checkmk excels in its comprehensive monitoring capabilities, covering everything from network devices and servers to applications and cloud services. The auto-discovery feature is a huge time-saver, and the customizable dashboards provide excellent visibility into our infrastructure's health. The scalability is also a major plus, allowing us to monitor a growing environment effectively. The check plugin ecosystem is vast, meaning we can monitor almost anything we need to.

Checkmk is a great one stop monitoring solution for your IT infrastructure. Cloud and on premise resources are monitored as well as network devices.