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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
23rd
Ranking in IT Infrastructure Monitoring
20th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
58
Ranking in other categories
Server Monitoring (12th), Cloud Monitoring Software (23rd)
OP5 Monitor
Ranking in Network Monitoring Software
39th
Ranking in IT Infrastructure Monitoring
38th
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 March 2026, in the Network Monitoring Software category, the mindshare of Nagios XI is 2.4%, down from 3.3% compared to the previous year. The mindshare of OP5 Monitor is 0.6%, down from 0.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Monitoring Software Mindshare Distribution
ProductMindshare (%)
Nagios XI2.4%
OP5 Monitor0.6%
Other97.0%
Network Monitoring Software
 

Featured Reviews

Emmanuel Appiah Boateng - PeerSpot reviewer
Network and Security Engineer at a educational organization with 1,001-5,000 employees
Simplifies setup and requires user interface enhancement
Nagios XI is easy to install, which sets it apart from other open-source solutions I've tried. Typically, setting up a monitoring system on Linux involves cloning files from GitHub, building it, and installing many dependencies, but with Nagios XI, it wasn't like that. Nagios XI simplifies our setup and reduces the time spent configuring monitoring tools.
Sumanth Arshanapally - PeerSpot reviewer
Senior Analyst at a tech vendor with 10,001+ employees
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

"They have very accurate and fast support."
"Nagios is the best software of its kind if you have time for configure any host and network, and you can do quite everything with a bit of scripting."
"Since this is an open source technology, if we are capable of writing the plugins in any scripting language, this product allows us to monitor anything we want."
"It's an essential part of our infrastructure, and we'll keep using it."
"Nagios allows us to configure any device so that we can send pager alerts when people don't have access to emails, and it also allows us to schedule downtime and maintenance."
"It provides an easy and powerful solution to network monitoring so I can pay attention to other concerns."
"The most valuable feature of Nagios XI is customization. We can customize based on our requirements. We can do modifications and implement a lot of scripts. Additionally, it is easy to use."
"Nagios XI simplifies our setup and reduces the time spent configuring monitoring tools."
"Instead of checking the logs each Monday, or checking that applications are running, and checking your ticketing system for angry users, you put this system in place and it monitors and continuously tests everything that is of importance to you and your users."
"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 best feature is that it is very relatable, stable, and scalable."
"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."
"The API makes it pretty easy to integrate with any system."
"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."
"Its open-source environment is accessible to everyone."
"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."
 

Cons

"Business services monitoring is still really basic."
"The Configuration Wizard needs improvement, because not all vendors are present."
"The reporting part should be made simpler. While we can obtain all the reports we need, we always have to create work-arounds to get them."
"The PNP4Nagios plugin not working easily with XI is an issue for me, because some open source monitoring plugins do not work out of the box."
"Technical support is an area that needs improvement. It is not available 24/7."
"Nagios provides most of the features by default, however to add more services to it, it requires additional plugins which require little effort on administrative end."
"Reporting items needs more improvement and need to be more flexible based on customer needs."
"Nagios XI doesn't provide scripting. For example, if we have built up multiple IPX tunnels from a base location to a data center location and want to monitor or trigger an alert if the tunnel goes down, Nagios XI does not automatically send alerts notifying us that the tunnel is down."
"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."
"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."
"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."
"They need to improve the dashboard interface."
"We do not get performance reports properly, which needs improvement."
"The user interface is not what we are used to these days, and should be improved."
 

Pricing and Cost Advice

"As it is not an agentless tool, I think it is expensive."
"Nagios XI is open source."
"The licensing fees for this solution are approximately $3,000 USD per year."
"Licensing costs are reasonable."
"The pricing is high with separate licensing for the product and support."
"It is good to contact experts for advice about what is the best solution for your specific infrastructure and enterprise."
"Nagios Core does not have any payment, but Nagios XI requires payment for the license."
"You can grow into the higher-priced scale as they learn how to utilize the features for Nagios XI."
"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
IT Developer at a tech services company with 51-200 employees
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
Financial Services Firm
10%
Computer Software Company
9%
Manufacturing Company
7%
Government
7%
Manufacturing Company
13%
Government
12%
Financial Services Firm
12%
Healthcare Company
9%
 

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 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 primary use case for Nagios XI?
I normally use Nagios XI for our servers. It's not particularly used for network equipment, however, I use it for monitoring our server performance, including CPU, memory, data, and services runnin...
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: March 2026.
885,264 professionals have used our research since 2012.