Nagios Core vs OpServices OpMon comparison

Nagios and OpServices are both solutions in the IT Infrastructure Monitoring category. Nagios is ranked #10 with an average rating of 8.7, while OpServices is ranked #77. Nagios holds a 2.2% mindshare in IM, compared to OpServices’s 0.4% mindshare. Additionally, 80% of Nagios users are willing to recommend the solution, compared to 100% of OpServices users who would recommend it.

Nagios Core

Read 51 Nagios Core reviews

5,494 Views
4,066 Comparison Views

80% willing to recommend

OpServices OpMon

Read 2 OpServices OpMon reviews

428 Views
428 Comparison Views

100% willing to recommend

Nagios Core

OpServices OpMon

Comparison Buyer's Guide

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Executive SummaryUpdated on Oct 9, 2024

OpServices OpMon and Nagios Core compete in the IT monitoring space. OpMon holds an advantage in pricing and customer support, while Nagios Core's feature set makes it appealing despite higher costs.

Features: OpMon offers intuitive monitoring, customizable dashboards, and robust analytics. Nagios Core features extensive plugin support, a wide array of monitoring capabilities, and flexible extensions.

Room for Improvement: OpMon could enhance its analytics depth, expand plugin support, and improve third-party integrations. Nagios Core may benefit from a simplified user interface, improved documentation, and direct customer support options.

Ease of Deployment and Customer Service: Nagios Core requires technical expertise for deployment and relies on community-driven support. OpMon offers straightforward deployment and dedicated customer service for smoother onboarding.

Pricing and ROI: OpMon presents competitive setup costs, offering immediate ROI benefits through efficiency. Nagios Core, initially free, can incur additional costs due to necessary plugins, presenting value through feature richness.

To learn more, read our detailed Nagios Core vs. OpServices OpMon Report (Updated: March 2026).

Buyer's Guide

Nagios Core vs. OpServices OpMon

March 2026

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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

10th

Average Rating

8.2

Reviews Sentiment

7.3

Number of Reviews

Ranking in other categories

Network Monitoring Software (10th)

OpServices OpMon

Ranking in IT Infrastructure Monitoring

77th

Average Rating

9.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of March 2026, in the IT Infrastructure Monitoring category, the mindshare of Nagios Core is 2.2%, down from 3.7% 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
Product	Mindshare (%)
Nagios Core	2.2%
OpServices OpMon	0.4%
Other	97.4%

IT Infrastructure Monitoring

Featured Reviews

Husham Yaqoob

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.

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it_user220206

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.

Read full review

Quotes from Members

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

Pros

"You should really try Nagios; it will help a lot and I have found that it is the best buddy for system admins."

"The most valuable features are the reports and the way it generates the report in a graphical manner."

"Other products are good but from the configuration point of view Nagios is really very lightweight. The price is really good in my opinion. Another important thing is that my Nagios engine still works with Dual core 8GB ram for the last 10 years."

"Nagios monitors our servers, so we know if anything goes wrong and can solve the problem before it happens."

"The reporting structure and the feature set are valuable to me."

"We use the product to monitor server applications."

"It sends alerts to the right people which ensures there is no delay in the correct person or team looking into issues, and it has helped to reduce downtime in the production environment to almost zero so we now spend less time on network or server administration."

"The most valuable features are the reports and the way it generates the report in a graphical manner."

More Nagios Core pros

"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."

"Since we started using OpMon, we have increased our assertiveness and consequently reduced costs with fewer errors."

Cons

"The dashboard and monitoring features could be improved."

"Nagios Core could improve by adding a user interface. If you want the user interface you have to use Nagios XI."

"Nagios Core does not have a graphic display."

"The initial setup process could be easier."

"Nagios Core could improve by adding a user interface. If you want the user interface you have to use Nagios XI."

"The scalability needs improvement, it's not scalable at this time."

"When compared to earlier versions, it looks like 4.x has lost the statusmap.cgi module."

"Nagios Core is not easy to use, so I don't recommend it for everyone."

More Nagios Core cons

"Infrastructure and business monitoring services need improvement."

Pricing and Cost Advice

"Lessening the price point would be an improvement."

"Nagios Core is an open source solution, and there are no licensing fees."

"I would rate the solution's pricing an eight out of ten."

"Nagios Core is free to use."

"We are using the free version."

"The Nagios Core (PNP4Nagios + Core) is free and can be setup by Netadmin within a few hours. The only additional cost is the cloud server."

"It's free."

"The product is cheaply priced."

More Nagios Core pricing and cost advice

Information not available

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Top Industries

By visitors reading reviews

Manufacturing Company

10%

Comms Service Provider

10%

Computer Software Company

Government

No data available

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	20
Midsize Enterprise	11
Large Enterprise	23

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.

See all answers

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.

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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...

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Comparisons

LibreNMS vs Nagios Core

Compared 7% of the time

Icinga vs Nagios Core

Compared 6% of the time

Zabbix vs Nagios Core

Compared 5% of the time

Centreon vs Nagios Core

Compared 5% of the time

Nagios XI vs Nagios Core

Compared 5% of the time

More Nagios Core Competitors

Zabbix vs OpServices OpMon

Compared 36% of the time

Nagios XI vs OpServices OpMon

Compared 30% of the time

LiveNX vs OpServices OpMon

Compared 19% of the time

Dell CloudIQ vs OpServices OpMon

Compared 15% of the time

More OpServices OpMon Competitors

Product Reports

Buyer's Guide

Nagios Core

March 2026

Download Nagios Core product report

Buyer's Guide

IT Infrastructure Monitoring

March 2026

Download OpServices OpMon product report

Also Known As

No data available

OpMon

Overview

This is IT infrastructure monitoring's industry-standard, open-source core. Free without professional support services.

Nagios

OpMon allows you to track, in real time, the performance of the business activities and their results. It generates reports of availability, capacity and performance, SLA, SLM, among others. Allows reduction in spending on skilled professionals and reduction in loss / hour derived from system failures.

OpServices

Sample Customers

Airbnb, Cisco, PayPal, FanDuel

Allianz, banco renner, AES Sul, Metalfrio Solutions, Mitsubishi Motors, Ciplan, Unimed, Portonave, Grupo Zaffari

Buyer's Guide

Nagios Core vs. OpServices OpMon

March 2026

Free Report: Nagios Core vs. OpServices OpMon

Find out what your peers are saying about Nagios Core vs. OpServices OpMon and other solutions. Updated: March 2026.

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