

The best free alternative to LibreNMS is Zabbix, which is also Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to LibreNMS and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to LibreNMS are Nagios, Paessler PRTG Network Monitor, Spiceworks and Checkmk.


Netdisco is an Open Source web-based network management tool first released publically in 2003. The target users are large corporate and university networks administrators. Data is collected into a Postgres database using SNMP and presented with a clean web interface using Mason.



ActiveXperts Network Monitor is a network and server monitoring tool to allow administrators to monitor the network for failures and irregularities automatically.




UISP is Ubiquiti Network's management platform for all UISP, LTU, airMAX, airFiber devices. It also includes built in CRM and billing for ISPs.




Trafikito is free Linux servers monitoring solution which by default checks RAM, disk space, CPU and sends you an email if something is wrong.




The alerta monitoring system is a tool used to consolidate and de-duplicate alerts from multiple sources for quick ‘at-a-glance’ visualisation. With just one system you can monitor alerts from many other monitoring tools on a single screen.


Network intruder and presence detector. Scans for devices connected to your network and alerts you if new and unknown devices are found.


LANState is a simple NMS with the network topology mapping and device monitoring functions. Add hosts to a graphical network map and monitor their state in the real time. Receive failure notifications when hosts and services go down.




Cloud based network monitoring software that allows you to monitor servers, virtual machines, cloud and websites.






