Alternatives to PRTG Network Monitor
Sensor-based network monitoring, free for the first 100 sensors. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
PRTG Network Monitor
Sensor-based network monitoring, free for the first 100 sensors.
Replacements
Listings that take over the same core job as PRTG Network Monitor.
SolarWinds Network Performance Monitor
Industry-standard self-hosted network performance monitor with intelligent maps.
SolarWinds Network Performance Monitor is fully paid with no free sensor allowance, offering NetPath and intelligent maps, and needs dedicated infrastructure for its self-hosted deployment.
ManageEngine OpManager
Zoho's network monitoring software for routers, switches and hybrid infrastructure.
ManageEngine OpManager is also proprietary with a free tier for small networks, covering fault, performance and configuration management, while larger networks need paid tiers.
Zabbix
Enterprise-scale open-source monitoring for networks and applications.
Zabbix is free and open source under AGPL-3.0 and runs on Linux rather than a Windows server, scaling with proxies but with extensive configuration.
LibreNMS
Discover and monitor network equipment from a central server.
LibreNMS is free under GPL-3.0 with no per-sensor licensing, providing network discovery, alerting and historical graphs from a central self-hosted server.
Checkmk
Hybrid open-source and commercial monitoring with agent-based and SNMP auto-discovery.
Checkmk has an open-source core with agent-based and SNMP auto-discovery, while advanced features and scaling are gated behind paid commercial editions.
Observium
Autodiscovering network monitoring platform with a clean interface.
Observium runs on Linux with autodiscovery that adds graphs and inventory automatically, but alerting and some features are in its subscription edition.
OpenNMS
Carrier-grade open-source network monitoring platform with event correlation.
OpenNMS is open source with event correlation and Grafana integration, aimed at carrier-grade networks, and paid tiers cover enterprise support and advanced features.
NetXMS
Monitor network devices, servers and infrastructure through a central platform.
NetXMS is open source and monitors network devices and servers through a central platform, with enterprise services and editions under separate terms.
Also worth comparing
These listings name PRTG Network Monitor as their own alternative, so the relationship runs both ways.
Cacti
RRDtool-based graphing and monitoring for network devices.
PRTG offers autodiscovery, maps and alerting in one interface with 100 free sensors, but it is closed source, Windows-server only and priced per sensor.
Centreon
French enterprise network and IT monitoring platform with business activity dashboards.
PRTG provides autodiscovery, maps and alerting with 100 free sensors, but it runs only on a Windows server, is closed source and is priced per sensor.
Nagios Core
Monitor hosts and services with a configurable alerting engine.
PRTG configures autodiscovery, maps and alerting through one interface, free for 100 sensors, but is closed source and runs on Windows servers only.
Nagios XI
Commercial self-hosted edition of Nagios with a web-based setup wizard.
PRTG configures autodiscovery, maps and alerting in one interface with 100 free sensors, but runs only on Windows servers and licenses per sensor.
Pandora FMS
A monitoring platform for servers, networks, applications and logs, with an open-source edition.
PRTG is closed source and runs on a Windows server, free for the first 100 sensors with per-sensor licensing beyond that.
Similar software
Related functionality, not a direct replacement.
SmokePing
Latency measurement and visualisation over time.
Grafana
Dashboard and visualization front end for metrics, logs and traces.
Tactical RMM
A self-hosted remote monitoring and management tool with agents for Windows, Linux and macOS.
