ManageEngine OpManager is described as 'Monitor networks in real-time with tools for visualization and fault management, compatible with major server types, ensuring comprehensive device monitoring' and is a Network Monitor in the network & admin category. There are more than 50 alternatives to ManageEngine OpManager for a variety of platforms, including Linux, Web-based, Windows, Self-Hosted and Mac apps. The best ManageEngine OpManager alternative is Zabbix, which is both free and Open Source. Other great apps like ManageEngine OpManager are Netdata, Nagios, Datadog and Spiceworks.