Zabbix
Zabbix is an open-source server used for the monitoring and alerting of anything accessible via a computer network. This includes but is not limited to Hardware monitoring for temperature or chassis status, Server monitoring for compute (CPU, RAM, etc) usage, Application monitoring for service availability and status, Web monitoring for latency and speed and literally anything you can think of possibly wanting to know its status. Monitoring and zabbix is also valuable for capacity planning through comparison over time / trend analysis.
Pipe Ten is an expert in the deployment, management and use of Zabbix with decades of successful experience with thousands of items being monitored per second, hundreds of servers being monitored and alerted to engineers 24/7/365.