Top 12 Open-Source Alternatives to Nagios Core

Nagios Core

Nagios Core is a fastest-growing IT Infrastructure monitoring and alerting solution that is created for all sizes of businesses.

The top open-source alternatives to Nagios Core are Zabbix, Datadog, and Prometheus. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Zabbix Landing Page
1

Zabbix

Track, record, alert and visualize performance and availability of IT resources
Pricing:
- Open Source
- Free
#Monitoring Tools #Performance Monitoring #DevOps Tools 5 social mentions
Datadog Landing Page
2

Datadog

See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Pricing:
- Open Source
- Freemium
- Free Trial
- $15.0 / Monthly (per host)
#Monitoring Tools #Log Management #Error Tracking 5 social mentions
Prometheus Landing Page
3

Prometheus

An open-source systems monitoring and alerting toolkit.
Pricing:
- Open Source
#Monitoring Tools #Performance Monitoring #Log Management 227 social mentions
Instrumental Landing Page
4

Instrumental

Real-Time Application & Performance Monitoring
Pricing:
- Open Source
#Performance Monitoring #Monitoring Tools #Log Management 1 social mentions
LibreNMS Landing Page
5

LibreNMS

A fully featured network monitoring system that provides a wealth of features and device support.
Pricing:
- Open Source
#Monitoring Tools #Network Monitoring #Performance Monitoring
Wireshark Landing Page
6

Wireshark

Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
Pricing:
- Open Source
#Monitoring Tools #Log Management #Performance Monitoring 11 social mentions
Foreman Landing Page
7

Foreman

Foreman is an open source project that helps system administrators manage servers throughout their...
Pricing:
- Open Source
#DevOps Tools #Monitoring Tools #IT Automation 18 social mentions
Checkmk Landing Page
8

Checkmk

Checkmk - the software for effective IT monitoring
Pricing:
- Open Source
- Freemium
- Free Trial
- €600.0 / Annually
#Monitoring Tools #Log Management #Incident Management 53 social mentions
Cacti Landing Page
9

Cacti

Cacti is a complete network graphing solution. It provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features.
Pricing:
- Open Source
#Monitoring Tools #Performance Monitoring #Log Management
Nagios Landing Page
10

Nagios

Complete monitoring and alerting for servers, switches, applications, and services
Pricing:
- Open Source
#Monitoring Tools #Performance Monitoring #Log Management
Icinga Landing Page
11

Icinga

Icinga is a fork of Nagios and is backward compatible.
Pricing:
- Open Source
#Monitoring Tools #Log Management #Performance Monitoring 8 social mentions
Sematext Landing Page
12

Sematext

Troubleshooting just got easier.
Pricing:
- Open Source
- Freemium
- Free Trial
#Infrastructure Monitoring #Server Monitoring #Log Management 6 social mentions