No more typing reviews! Try our Samantha, our new voice AI agent.

Nagios Core vs OpServices OpMon comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jun 3, 2026

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

Nagios Core
Ranking in IT Infrastructure Monitoring
12th
Average Rating
8.2
Reviews Sentiment
7.3
Number of Reviews
51
Ranking in other categories
Network Monitoring Software (12th)
OpServices OpMon
Ranking in IT Infrastructure Monitoring
77th
Average Rating
9.0
Number of Reviews
2
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2026, in the IT Infrastructure Monitoring category, the mindshare of Nagios Core is 1.7%, down from 3.5% compared to the previous year. The mindshare of OpServices OpMon is 0.4%, up from 0.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
IT Infrastructure Monitoring Mindshare Distribution
ProductMindshare (%)
Nagios Core1.7%
OpServices OpMon0.4%
Other97.9%
IT Infrastructure Monitoring
 

Featured Reviews

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.
it_user220206 - PeerSpot reviewer
Director of IT with 51-200 employees
​It offers a simple implementation of business and infrastructure dashboards but the monitoring services need improvement.
* Service group capability * Ability to monitor users experience * Simple implementation of business and infrastructure dashboards * Network traffic monitoring Also, OpMon offers: * Greater scalability * Easy to manage and implement * The ability to create business groups that generate more accurate information * It has a robust and agile architecture; and * A highly trained team that gives it a lot of credibility.

Quotes from Members

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

Pros

"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."
"Nagios monitors our servers, so we know if anything goes wrong and can solve the problem before it happens."
"I would rate the overall solution ten points out of ten."
"I like the way the solution sends alerts and how it keeps on escalating them."
"We have saved a lot of time, money, and effort in reducing disaster times, which is owed to Nagios quick alerting."
"The good thing about Nagios Core is it covers everything."
"The most valuable features are the reports and the way it generates the report in a graphical manner."
"We have the ability right now to see and create reports to tell whether or not we're meeting our SLAs on our production servers, through it."
"Since we started using OpMon, we have increased our assertiveness and consequently reduced costs with fewer errors."
"As a consulting company we implement management solutions to a large variety of companies and after working with OpMon our project time was reduced and we can offer a different solution to each customer."
 

Cons

"The core version is no match for the XI version."
"We're using the free version, which limits us in terms of the things that we can do."
"The tool needs to improve the integrations."
"Bandwidth monitoring is the pain point for me because Nagios Core does not monitor bandwidth effectively like Cacti does."
"I would like to see a much better Nagios Manager GUI that can support all type of configuration items, and advance search options."
"This is the open source product, so it's a toolkit rather than a complete solution."
"The UI is a little outdated and graphics could be displayed in a better way."
"I would like to see a sensor that shows the traffic of a user and what they're doing on the network."
"Infrastructure and business monitoring services need improvement."
 

Pricing and Cost Advice

"We are using the free version of Nagios Core."
"It's free."
"Lessening the price point would be an improvement."
"Nagios Core is a cheap solution."
"Nagios Core is an open source solution, and there are no licensing fees."
"We are using the open-source, unpaid version."
"The product is cheaply priced."
"Most the plugin features are free."
Information not available
report
Use our free recommendation engine to learn which IT Infrastructure Monitoring solutions are best for your needs.
902,894 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Manufacturing Company
10%
Comms Service Provider
9%
Financial Services Firm
8%
Computer Software Company
7%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise11
Large Enterprise24
No data available
 

Questions from the Community

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...
Ask a question
Earn 20 points
 

Comparisons

 

Also Known As

No data available
OpMon
 

Overview

 

Sample Customers

Airbnb, Cisco, PayPal, FanDuel
Allianz, banco renner, AES Sul, Metalfrio Solutions, Mitsubishi Motors, Ciplan, Unimed, Portonave, Grupo Zaffari
Find out what your peers are saying about Nagios Core vs. OpServices OpMon and other solutions. Updated: June 2026.
902,894 professionals have used our research since 2012.