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Checkmk vs OpenNMS comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Checkmk
Ranking in Network Monitoring Software
14th
Average Rating
8.4
Reviews Sentiment
7.3
Number of Reviews
9
Ranking in other categories
Server Monitoring (11th), IT Infrastructure Monitoring (26th), Cloud Monitoring Software (19th)
OpenNMS
Ranking in Network Monitoring Software
56th
Average Rating
0.0
Number of Reviews
0
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of January 2026, in the Network Monitoring Software category, the mindshare of Checkmk is 2.6%, down from 2.9% compared to the previous year. The mindshare of OpenNMS is 1.3%, down from 1.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Monitoring Software Market Share Distribution
ProductMarket Share (%)
Checkmk2.6%
OpenNMS1.3%
Other96.1%
Network Monitoring Software
 

Featured Reviews

reviewer1704309 - PeerSpot reviewer
IT Administrator at a construction company with 201-500 employees
Utilizing data monitoring capabilities and scripting potential to optimize system management
I frequently program functions with PowerShell, and although Bash could be used, my specialization is in PowerShell. Two of us focus on programming in PowerShell for infrastructure optimization. I set up a dedicated server to run scripts every hour, generating files for Checkmk output. However, Checkmk does not allow running scripts at varying intervals. I am working on this in the raw version of Checkmk.
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Top Industries

By visitors reading reviews
Computer Software Company
10%
Government
9%
Manufacturing Company
9%
Financial Services Firm
7%
Government
20%
Comms Service Provider
10%
Manufacturing Company
9%
Computer Software Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise3
Large Enterprise2
No data available
 

Questions from the Community

What needs improvement with Checkmk?
I will get more information about Checkmk when the proof of concept is done. It's going to be before the summer. There will be a report about the tool and a recommendation to use it. So far, it loo...
What is your primary use case for Checkmk?
Checkmk ( /products/checkmk-reviews ) is a monitoring tool, so that's what I will use it for. Right now, it's not in production, but it's in a proof of concept phase. It looks good, so probably, du...
What advice do you have for others considering Checkmk?
I would rate Checkmk an eight out of ten, not knowing the final report.
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Comparisons

 

Overview

 

Sample Customers

Information Not Available
OpenNMS users include five of the top twenty companies on the Fortune 100, as well as multiple large and multi-state health providers and one of the largest electronic medical record providers in the United States.
Find out what your peers are saying about Zabbix, Auvik, Datadog and others in Network Monitoring Software. Updated: January 2026.
879,853 professionals have used our research since 2012.