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Checkmk vs Nagios Core comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Oct 9, 2024

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
17th
Ranking in IT Infrastructure Monitoring
24th
Average Rating
8.4
Reviews Sentiment
7.3
Number of Reviews
9
Ranking in other categories
Server Monitoring (10th), Cloud Monitoring Software (20th)
Nagios Core
Ranking in Network Monitoring Software
19th
Ranking in IT Infrastructure Monitoring
16th
Average Rating
8.2
Reviews Sentiment
7.3
Number of Reviews
51
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2026, in the Network Monitoring Software category, the mindshare of Checkmk is 1.4%, down from 3.9% compared to the previous year. The mindshare of Nagios Core is 1.4%, down from 2.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Monitoring Software Mindshare Distribution
ProductMindshare (%)
Checkmk1.4%
Nagios Core1.4%
Other97.2%
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.
HY
Senior System Administrator at Interactive Group
Monitoring solution provides comprehensive visibility across IT infrastructure
The good thing about Nagios Core is it covers everything. Everything in the IT domain, you can monitor anything. You can even monitor printers, the ports of printers, Core workstations, and storage. You can monitor the workflow Core and the utilization of computes. If you want to grasp everything of your IT equipment on a single interface, you can use Nagios. It's the best one. It provides dashboards, and you can also configure your emails and alerts with it. If something is critical, you can configure it to notify via emails. It has a very handy dashboard, providing live alerts and visibility for everything.

Quotes from Members

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

Pros

"The alerting system in Checkmk really works properly."
"I really like the auto-discovery feature."
"The most valuable feature of the solution is that it has a lot of different pieces, and they all work together...It is a very scalable solution. Scalability-wise, I rate the solution a ten out of ten."
"Checkmk was built on a platform that was user-friendly, and I could build my charts easily."
"The most valuable features of Checkmk are its resource monitoring, infra monitoring, and log factor configuration."
"We can monitor multiple sites using the product."
"The initial setup of Checkmk was easy...It is a very stable solution."
"Checkmk helps me compare data and foresee issues."
"Nagios Core is very configurable. Whatever you want, you can do it."
"The most valuable feature depends on the project. It's great if you need to check to ensure a service is running 24/7. I can use the full solution for free, and it's flexible. If I need to add a dashboard, I can integrate it with Nagios. Cloud synchronization is wonderful."
"Nagios Core is a great tool for monitoring the infrastructure including MSM queues, and when we use the agent, we can add other things as well."
"Dashboard provides monitor of total assets."
"Reliability Security Flexibility Functionality Availability - controllability anywhere and with different methods"
"We have saved a lot of time, money, and effort in reducing disaster times, which is owed to Nagios quick alerting."
"I like the way the solution sends alerts and how it keeps on escalating them."
"We are using Nagios Core on a VM and it's working very well, even though the specs of the VM are very low because it doesn't require much storage."
 

Cons

"Sometimes we receive alerts, and it can become annoying when you acknowledge an alert. It is very clunky when you acknowledge the alert. The process is not very intuitive, and there are instances where it feels a bit cumbersome to acknowledge an alert."
"If an alert is generated for a specific pattern in the log, and if Checkmk catches that log, it will stay there even after the alert is resolved."
"It is easy for tech-savvy people, but newcomers might find it intimidating."
"In Checkmk, the documentation can probably be improved a bit more."
"Checkmk does not work too easily with the PowerStore. I use a PowerShell script as Checkmk runs on Linux and a Windows system, connecting with the Checkmk agent."
"I think that the integration and the exporting of the data collected are areas where Checkmk lacks but should try to improve the most."
"The initial setup is a bit complex."
"The main challenge for us is that we're moving from Nagios to Checkmk, and we're still getting used to the new way of working."
"The user interface could be more interactive because it is pretty basic."
"t was a little hard to get our setup represented in the configuration."
"Nagios Core is not easy to use, so I don't recommend it for everyone."
"Application level monitoring is limited."
"Default interface is clunky and slow."
"Generally, it does what I need it to do, but better error reporting would be great."
"We're using the free version, which limits us in terms of the things that we can do."
"Nagios Core could improve by adding a user interface. If you want the user interface you have to use Nagios XI."
 

Pricing and Cost Advice

"Checkmk is a fairly reasonably priced solution."
"The price of Checkmk is cheaper compared to other enterprise products."
"The product is affordable."
"Nagios Core is free to use."
"The product is cheaply priced."
"We are using the free version."
"Lessening the price point would be an improvement."
"We are using the free version of Nagios Core."
"The solution is expensive."
"It's free."
"Nagios Core is an open source solution, and there are no licensing fees."
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Top Industries

By visitors reading reviews
Manufacturing Company
10%
Comms Service Provider
9%
Government
9%
Financial Services Firm
8%
Comms Service Provider
10%
Manufacturing Company
9%
Financial Services Firm
8%
Construction Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise3
Large Enterprise2
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise11
Large Enterprise24
 

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.
What is your experience regarding pricing and costs for Nagios Core?
Nagios Core is a free and open-source product. We don't charge for the product itself, but we charge for the man-hour costs related to installation, configuration, ongoing operation, and maintenance.
What needs improvement with Nagios Core?
The dashboard should be improved. It's very simple. I don't have a very clear or specific suggestion. You can change the skin of the dashboard, however, it's good for me.
What is your primary use case for Nagios Core?
I was a senior system administrator. I've been using Nagios Core for more than ten years now. It can be used to monitor hosts, such as machines, and monitor services of any kind. I'm using it to mo...
 

Comparisons

 

Overview

 

Sample Customers

Information Not Available
Airbnb, Cisco, PayPal, FanDuel
Find out what your peers are saying about Checkmk vs. Nagios Core and other solutions. Updated: August 2026.
908,834 professionals have used our research since 2012.