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Open Source Nagios Alternatives

The best open source alternative to Nagios is Zabbix. If that doesn't suit you, our users have ranked more than 100 alternatives to Nagios and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Nagios are Netdata, Icinga, Cockpit Project and Cacti.

Nagios alternatives are mainly Network Monitors but may also be Website Monitors or Uptime Monitor Services. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Nagios.
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Nagios iconNagios
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  • FreemiumOpen Source
  • Linux

Nagios is a powerful monitoring system that enables organizations to identify and resolve IT infrastructure problems before...

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  1. Zabbix icon

    Zabbix

    • FreeOpen Source
    • Linux
    • Self-Hosted
    • FreeBSD
    • OpenBSD

    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.

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    Screenshot
    Zabbix vs Nagios opinions
    Almost everyone thinks Zabbix is a great alternative to Nagios.

    Innovative UI and complex functions.

    Positive comment ago
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    -1
  2. Infrastructure-wide health monitoring & performance troubleshooting in one place. Collaborate in the same place as relevant data from your systems and applications, reducing mean time to acknowledge (MTTA), & mean time to resolution. (MTTR).

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    Agent dashboard overview
    Netdata vs Nagios opinions
    pros, cons and recent comments

    Super fast monitoring of the system, and also of the monitors the kernel of the system.

    Positive comment ago
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    1


  3. Icinga icon

    Icinga

    • FreemiumOpen Source
    • Mac
    • Linux

    Icinga is a fork of Nagios and is backward compatible. So, Nagios configurations, plugins and addons can all be used with Icinga.

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    Screenshot
    Icinga vs Nagios opinions
    Almost everyone thinks Icinga is a great alternative to Nagios.
  4. Cockpit Project icon

    Cockpit Project

    • FreeOpen Source
    • Linux

    Makes it easy to administer Linux servers via a web browser. It allows you to easily perform simple tasks like storage administration, inspecting journals, starting & stopping services, monitoring & administering several servers at once.

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    Screenshot
  5. Cacti icon

    Cacti

    • FreeOpen Source
    • Windows
    • Linux

    Cacti is a complete frontend to RRDTool, it stores all of the necessary information to create graphs and populate them with data in a MySQL database. The frontend is completely PHP driven.

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    Screenshot
    Cacti vs Nagios opinions
    Most users think Cacti is a great alternative to Nagios.


  6. LibreNMS icon

    LibreNMS

    • FreeOpen Source
    • Linux
    • BSD
    • MySQL Community Edition
    • Apache HTTP Server
    • JavaScript
    • PHP

    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.

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    LibreNMS vs Nagios opinions
    pros, cons and recent comments
    Teke2

    So easy to setup, very powerful, and can use the Nagios plugins.

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    Best open source tool that I've tried! Easy to install, manage and low support.

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  7. Cabot icon

    Cabot

    • FreeOpen Source
    • Self-Hosted

    Cabot is a free, open-source, self-hosted infrastructure monitoring platform that provides some of the best features of PagerDuty, Server Density, Pingdom and Nagios without their cost and complexity.

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    Preview
  8. PHP Server Monitor icon

    PHP Server Monitor

    • FreeOpen Source
    • Windows
    • Linux
    • BSD
    • Self-Hosted
    • PHP
    • Cloudron

    PHP Server Monitor is a script that checks whether your websites and servers are up and running. It comes with a web based user interface where you can manage your services and websites, and you can manage users for each server with a mobile number and email address.

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    Screenshot
  9. Munin icon

    Munin

    • FreeOpen Source
    • Linux

    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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    Dashboard
  10. Checkmk is a monitoring tool of servers, applications, networks, cloud, containers, storage, databases, IoT and more. Checkmk is available as Raw Edition, which is 100% pure open source, and as Enterprise Edition with a lot of additional features.

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    Checkmk Dashboard
Showing 10 of 34 alternatives