OP5 Monitor is described as 'Our open and flexible server and network monitoring solution delivers a unified view of your entire IT environment. Monitor up to 100,000 devices from a single server, with distributed and redundant solutions for nearly infinite scalability' and is a Network Monitor in the network & admin category. There are more than 50 alternatives to OP5 Monitor for a variety of platforms, including Linux, Windows, Web-based, Self-Hosted and Mac apps. The best OP5 Monitor alternative is Zabbix, which is both free and Open Source. Other great apps like OP5 Monitor are Nagios, Datadog, Spiceworks and Laravel Nightwatch.