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.


Nagios is described as 'Powerful monitoring system licensed under Nagios Enterprises that helps organizations identify and resolve IT infrastructure issues' and is a popular Network Monitor in the network & admin category. There are more than 100 alternatives to Nagios for a variety of platforms, including Linux, Windows, Web-based, Self-Hosted and Mac apps. The best Nagios alternative is Zabbix, which is both free and Open Source. Other great apps like Nagios are Netdata, Icinga, Datadog and Cockpit Project.
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.


Server monitoring software for physical, virtual, and cloud-based IT. They also do email monitoring, application monitoring. The system is used to provide insight into server up-time and reduce outages.




It's built on the Nagios framework but extended its potential way beyond anyone else. My company used this after researching the others in this space.


Almost everyone thinks Opsview Enterprise is a great Nagios alternative.
System Center Operations Manager 2012 R2 uniquely enables customers to reduce the cost of data center management across server operating systems and hypervisors through a single, familiar and easy to use interface.
CloudMonix provides advanced cloud monitoring and automation for applications and services deployed on the Microsoft Azure and AWS platforms and built with MSPs, CSPs and DevOps in mind.

PingPlotter is a graphical traceroute and ping tool that visualizes network performance in a way that makes identifying the source of problems quicker and easier.

Unify your cloud-native monitoring with zero-code eBPF, advanced profiling, and 10x storage efficiency.




OpenNMS is an open-source network monitoring platform that helps you visualize and monitor everything on your local and distributed networks.




Easy to use configuration web interface for nagios and neamon. openITCOCKPIT is a perfomant monitoring system with support for distributed monitoring (Satellites), REST API, nice dashboards, maps, graphs and a modular concept for easy customization.




The automated IT performance monitoring platform that enables companies to easily and cost-effectively monitor their entire IT infrastructure stack.
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.


Stackify offers the only developers-friendly cloud based solution that fully integrates application performance management (APM) with error tracking and log management.




The Sensu Open Source Project (a.k.a. "Sensu Core") intends to provide an open framework for building comprehensive monitoring solutions, without imposing restrictions or being overly opinionated.
It makes it all easy and supports all OS distributions (AIX, Linux, Windows, Solaris) as well as network devices. Looks good and it's easy to use.