Skydive

LibreNMS

LibreNMS is a free, open-source network monitoring system that automatically discovers devices across a network using protocols like CDP, LLDP, OSPF, BGP, SNMP, and ARP, then continuously polls them for health and performance data. It's built to scale horizontally through distributed polling, which lets it handle networks ranging from a handful of switches to large, geographically distributed infrastructure. Alerting is highly configurable and can notify via email, IRC, Slack, and other channels, and the platform ships a full API for pulling monitoring data into other systems or dashboards. It integrates with tools like NfSen, collectd, SmokePing, RANCID, and Oxidized for flow analysis and configuration backup, and includes optional bandwidth billing based on port usage, making it a common choice for ISPs and network administrators who want a self-hosted alternative to commercial NMS products.

Auvik

Auvik is a cloud-based network management platform used by over 80,000 IT professionals and MSPs to get real-time visibility into their infrastructure. It automatically discovers devices and generates live network topology maps that update as the network changes, removing the need for manual diagram creation, and backs up device configurations with version history for easy comparison and recovery. The platform includes NetFlow-based traffic analysis to reveal user activity and traffic destinations, over 64 pre-configured alerts that display directly on network maps, and an integrated AI agent that analyzes network data to suggest probable root causes during troubleshooting. It supports 700+ device vendors out of the box and integrates with tools like Slack, Microsoft Teams, ConnectWise, and ServiceNow, serving MSPs and internal IT teams across manufacturing, healthcare, education, and financial services with clients reported including American Airlines, Westin Hotels, and DirecTV.

Observium

Observium is a network monitoring platform that automatically discovers devices and services on a network and collects real-time and historical performance data, presenting it through a web-based dashboard. It supports over 450 device operating systems and vendors, including Cisco, Juniper, HP, Dell, Windows, and Linux, and provides threshold, state, and syslog-based alerting. Beyond monitoring, Observium includes traffic accounting and billing features, rule-based automatic device grouping, network mapping, and a RESTful API for integrating with other tools. It ships in a free Community edition, alongside paid Professional and Enterprise editions that add real-time SVN updates and support hours, and is used by organizations including Twitch, eBay, and Spotify.