💡 Pick it for richer SNMP graphing and templates while keeping a free, self-hosted deployment.
Cacti is a network monitoring and graphing tool designed as a front-end application for the data logging tool RRDtool.
Best MRTG Alternatives ranked by AI · updated Aug 2026
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MRTG is an open-source network traffic monitoring tool that polls routers and other SNMP-enabled devices and generates time-series graphs. It is aimed at administrators who need lightweight bandwidth reporting and can manage configuration files and Perl-based tooling.
Top 6 MRTG alternatives
💡 Pick it when you want MRTG-style traffic graphs plus discovery, alerting, inventory, and modern dashboards.
LibreNMS is an open-source network monitoring tool that provides auto-discovery of devices, comprehensive alerting, and a wide range of supported operating systems.
💡 Pick it if you need full infrastructure monitoring and alerting instead of bandwidth graphs alone.
Zabbix is an enterprise-class open source distributed monitoring solution designed to monitor and track performance and availability of network servers, devices, and...
💡 Pick it for a supported, guided monitoring suite with less manual configuration than MRTG.
An all-in-one network monitoring solution with an intuitive interface and customizable alerts.
Pros
- Easy to use interface
- Flexible licensing model
Cons
- Limited free version
Starting from $1600 for 500 sensors
💡 Pick it for polished, automatic SNMP network monitoring with strong inventory and capacity graphs.
Observium is a low-maintenance auto-discovering network monitoring platform supporting a wide range of device types, platforms, and operating systems.
Free, with a paid Professional version available
6
ntopng
ntop
💡 Pick it when you need protocol and application-level traffic analysis instead of simple SNMP bandwidth history.
ntopng is a web-based network traffic monitoring platform for administrators and security teams. It analyzes live traffic and flow data with richer...
Pros
- Much richer dashboards and host-level analysis than darkstat
- Supports multiple traffic sources, including packets and exported flows
- Offers stronger alerting, application visibility, and historical reporting
Cons
- Heavier resource usage and more complex setup than darkstat
- Some advanced features require a paid edition
- Can be excessive for a single small server or home network
Free Community edition; paid editions available
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