The best free alternative to OpenNMS Horizon is Zabbix, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to OpenNMS Horizon and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to OpenNMS Horizon are Nagios, Spiceworks, Prometheus and HyperDX.
Gather and analyze accurate statistics and performance metrics, visualize it, get notified about current and potential issues without delay, and take advantage of our time-tested professional development and support.
Nagios is a powerful monitoring system licensed under Nagios Enterprises that helps organizations identify and resolve IT infrastructure issues.
Spiceworks is a software suite for IT professionals to manage networks, troubleshoot issues, and handle IT tasks. It offers free online tools for network connectivity management, remote computer access, user activity monitoring, contract tracking, and inventory scanning.
Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Since its inception in 2012, many companies and organizations have adopted Prometheus, and the project has a very active developer and user community.
Grafana Loki is a horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate. It does not index the contents of the logs, but rather a set of labels for each log stream.
LibreNMS is an autodiscovering PHP/MySQL based network monitoring system forked from Observium. LibreNMS aims to be easy to use, painless to deploy, and support monitoring of a wide range of devices. Observium's license changed to a modified QPL license in May 2012, and...
Comprehensive monitoring solution with over 200 sensor types, user-friendly interface, and powerful capabilities such as traffic analysis, failover clustering, and remote probes. Offers email and SMS alerts, supports SNMP and WMI, provides high-availability features and detailed reporting.
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NetXMS is an 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...
Munin is a networked resource monitoring tool that can help analyze resource trends and "what just happened to kill our performance?" problems. It is designed to be very plug and play. A default installation provides a lot of graphs with almost no work.
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