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Nagios XI vs OP5 Monitor 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

Nagios XI
Ranking in Network Monitoring Software
17th
Ranking in IT Infrastructure Monitoring
23rd
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
58
Ranking in other categories
Server Monitoring (10th), Cloud Monitoring Software (21st)
OP5 Monitor
Ranking in Network Monitoring Software
38th
Ranking in IT Infrastructure Monitoring
37th
Average Rating
8.6
Reviews Sentiment
4.4
Number of Reviews
7
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2025, in the Network Monitoring Software category, the mindshare of Nagios XI is 3.1%, down from 3.8% compared to the previous year. The mindshare of OP5 Monitor is 0.7%, down from 0.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Monitoring Software Market Share Distribution
ProductMarket Share (%)
Nagios XI3.1%
OP5 Monitor0.7%
Other96.2%
Network Monitoring Software
 

Featured Reviews

Amir  Said - PeerSpot reviewer
Effective alerting enhances network monitoring experience with an easy setup
We love Nagios XI due to the fact that JPS Web is very useful. JPS monitors the modem and performs switching, monitoring the computer, and performing switching. We implement some applications and traffic monitoring. The alerting system is very effective. For instance, if we have an alarm on some RAM storage if the traffic is cut or dropped.
Sumanth Arshanapally - PeerSpot reviewer
Monitoring ease and cost-saving benefits enhance operational efficiency
The monitoring in OP5 Monitor is very easy because we can directly use custom plugins. We can write custom scripts and use those scripts directly. It's very low cost, open, and the dashboards are easy to see. We can extract the reports easily, and this is very easy to compare. Real-time monitoring in OP5 Monitor provides data every one minute or every five minutes, enabling us to get live data from the last one minute or last five minutes. OP5 Monitor gave us proper server availability, so we can always check whether a server goes down or the server CPU and memory decreases. Before reaching a particular bottleneck situation, we identified and fixed the issue, which helped us from a cost-saving business perspective. It helped us avoid application downtime.

Quotes from Members

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

Pros

"The most valuable feature is the monitoring of processes."
"This is a very good solution and it is simple to use, for any company."
"BPI: It allows defining peripherals to map business criticality for efficient monitoring, as required."
"I can monitor a software made in-house to software of bigger companies."
"Nagios allows us to configure any device so that we can send pager alerts when people don't have access to emails. It also allows us to schedule downtime and maintenance."
"The installation is no problem. I've installed Nagios several times."
"You want to monitor a specific metric that nobody else has? You can do it even with the most basic of scripting skills, and you can always share it with the vast community of Nagios Exchange."
"Nagios XI helps us monitor the bandwidth of the internet connection, HTTP, DNS, active directory services, and exchange data availability. We have multiple servers to monitor databases, availability of servers, and ping."
"OP5 Monitor is a great choice due to its being built on an open-source monitoring tool and provides ample opportunity for customization based on specific support requirements. It is also user-friendly and easy to manage with a wide range of plugins available for use. In comparison to other enterprise tools, such as Micro Focus, OP5 Monitor stands out for its features and cost-effectiveness, making it the best tool in the market. Customization is one of the key strengths of the tool and provides a lot of capabilities. Additionally, it is easy to find support and plugins for the tool through online resources."
"With limited hardware or a virtual machine, you can address a huge network, hundreds of thousands of elements that need to be monitored. Other commercial software is not on that level."
"We can also observe whatever we want, and there are no limitations."
"The best feature is that it is very relatable, stable, and scalable. The logger is a part of the software, but it's not the most important point of it."
"It monitors and continuously tests everything that is of importance to you and your users. It could be everything from monitoring disk space to CPU usage to memory. It could include determining if the response time in your e-commerce platform is quick enough, or whether you have too many bounces from some of the pages on your website. You want to monitor anything that could cost you money or time or resources. You can do that with this system. It's very flexible."
"The API makes it pretty easy to integrate with any system."
 

Cons

"The scalability of Nagios XI is scalable. However, it is not easy to do."
"From an alerting point of view, some graphics and metrics don't work properly with Nagios XI as they do with Checkmk."
"The pricing has recently risen. I know they've changed what is covered under the license, however, it doesn't change the way we use it and adds nothing to our experience, and yet we now have to pay more."
"I would like to see support for notification via SMS."
"It can be quite difficult to know which drivers and agents to use when setting up."
"Technical support is an area that needs improvement. It is not available 24/7."
"I would like to see more customization in the network map because it is a bit tricky to use it."
"The way Nagios displays information isn't easy for a new user to understand. It's not intuitive enough. You need to read some tutorials or be trained to understand what it's displaying. Also, I think it needs more features to improve network visibility because there are some things you can't detect."
"The solution is useful for tweaking. However, there have been some negative experiences, such as limited report capabilities. The only report available is in PDF format, making it difficult for teams managing multiple servers to extract data in Excel format. The speaker recommends that the team improve the report capabilities to better serve users."
"They need to improve the dashboard interface."
"OP5 Monitor could include application monitoring in addition to infrastructure monitoring. If application business transactions were monitored, it would be helpful."
"The user interface is not what we are used to these days, and should be improved."
"IT environments today are in constant flux. This is driven by the newer cloud technologies such as Kubernetes and Docker, etc. The whole Nagios-based monitoring system that OP5 is created on top of, is based on a host-service model. There is a need for a strategy on what to do with more dynamic environments. There is some cool stuff going on in that direction."
"OP5 lacks some visualization, a feature that makes some other products nice. Op5 is built for purpose, which is fine, but if you compare it with some new products, the visualization is not so appealing, especially for management... If you don't need fancy visualizations, OP5 is fine."
"We do not get performance reports properly."
 

Pricing and Cost Advice

"Licensing costs are reasonable."
"This solution is very expensive, at approximately $5,000 USD when I purchased it, which is why I haven't upgraded my version in several years."
"The pricing is high with separate licensing for the product and support."
"The pricing is really cost efficient. The licensing is perpetual and can be renewed very easily."
"The licensing fees for this solution are approximately $3,000 USD per year."
"It is good to contact experts for advice about what is the best solution for your specific infrastructure and enterprise."
"Nagios XI is an expensive solution."
"We are using the free version of this solution."
"It was not expensive. And because it's less demanding in terms of hardware, you don't have to pay for another SQL or other database license, and you can have a huge installation on one machine..."
"OP5 has a very low price as a solution, compared to many other solutions out there."
"The cost of the license and support are separate. If you want platinum call support, it will cost more than a regular call. I did not opt for it, as it is an additional cost."
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Comparison Review

it_user174738 - PeerSpot reviewer
May 31, 2015
Nagios vs. Zabbix vs. PRTG vs. Spiceworks vs. Solarwinds Network Performance Monitor
I have researched a quite a few network monitoring tools which can be used for various monitoring purposes of not only the servers, but the intermediate routers as well. There are majorly three types of these softwares. Ones which are completely open-source, you can do almost anything you want…
 

Top Industries

By visitors reading reviews
Computer Software Company
13%
Financial Services Firm
11%
Manufacturing Company
9%
Government
9%
Government
19%
Manufacturing Company
10%
Financial Services Firm
9%
Computer Software Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business22
Midsize Enterprise17
Large Enterprise21
By reviewers
Company SizeCount
Small Business2
Large Enterprise5
 

Questions from the Community

What do you like most about Nagios XI?
It is an open-source platform with valuable features for performance and stability.
What is your experience regarding pricing and costs for Nagios XI?
The pricing for the Nagios XI product is good and better than other solutions. I would give it a four or five.
What needs improvement with Nagios XI?
The user interface needs improvement. Many tools have poor user interfaces, making them hard to manage and navigate.
What is your experience regarding pricing and costs for OP5 Monitor?
The price for OP5 Monitor is fine, but we don't know the exact price because it was managed by us; the customer themselves bought it and gave it to us to monitor.
What needs improvement with OP5 Monitor?
OP5 Monitor could include application monitoring in addition to infrastructure monitoring. If application business transactions were monitored, it would be helpful. For application-related issues, ...
What is your primary use case for OP5 Monitor?
Our previous use case for OP5 Monitor was server monitoring.
 

Comparisons

 

Overview

 

Sample Customers

Nagios has over one million users globally, including AOL, DHL, McAfee, MCI, MTV, Yahoo!, Universal, Toshiba, Sony, Siemens, and JPMorgan Chase.
Svenska Spel, Carus, VGL, Tele2, Viking Line, Clas Ohlson, Vanderlande, Försäkringskassan
Find out what your peers are saying about Nagios XI vs. OP5 Monitor and other solutions. Updated: September 2025.
867,676 professionals have used our research since 2012.