NetXMS is described as 'Enterprise grade multi-platform open source network management and monitoring system. It provides comprehensive event management, performance monitoring, alerting, reporting and graphing for all layers of IT infrastructure — from network devices to business' and is a Network Monitor in the network & admin category. There are more than 25 alternatives to NetXMS for a variety of platforms, including Linux, Windows, Web-based, Mac and Self-Hosted apps. The best NetXMS alternative is Zabbix, which is both free and Open Source. Other great apps like NetXMS are Nagios, Datadog, Spiceworks and HyperDX.