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Centreon vs Nagios XI vs OP5 Monitor comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

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

Mindshare comparison

As of October 2025, in the Network Monitoring Software category, the mindshare of Centreon is 2.2%, down from 3.0% compared to the previous year. The mindshare of Nagios XI is 3.1%, down from 3.7% compared to the previous year. The mindshare of OP5 Monitor is 0.7%, down from 0.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Monitoring Software Market Share Distribution
ProductMarket Share (%)
Centreon2.2%
Nagios XI3.1%
OP5 Monitor0.7%
Other94.0%
Network Monitoring Software
 

Featured Reviews

Simon KONAN - PeerSpot reviewer
Plug-ins are free but it has limitations in sending out information to users
The issue my company has with the tool stems from the fact that it didn't give an on-time response to us. The product collects the information, but it fails to send them via SMS, WhatsApp or Telegram. The solution can be used if you want to get email notifications, which is not good for our company because if someone is not in front of their desktop, you can't receive information about an equipment or LAN that is down.
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

"For servers and for applications, it was very, very efficient."
"The most valuable feature is the monitoring of servers and networks, because we have a lot of them and need to maintain control."
"The downtimes feature is helpful. If the ISP is doing some maintenance on its network, we have the option to put downtime on the devices or the services, so we won't get any false alarms."
"It is decentralized, which is better, because you can reduce the load from a single system. Also, you get a better view because it's more independent. Then, for the management, it's nice because they have one central system. With that, they can manage all the other systems, as well. This means they don't have to configure each system by system. They can configure it from one single interface."
"The most valuable feature is the ability to build an abstraction of service visualization. You can add services to an entity called Business Activities and you can see the state of these activities."
"We use the remote server functionality on some customer sites, because you can see an independent view and are not dependent on a single connection. If you have branch offices or bigger office outside your headquarters, you can use remote servers because if the connection is broken or disrupted, then remote server will obtain a view of your environment and server availability. This is a good point against using other solutions. Because with other solutions, you don't have this feature. Then, you will be blind if you have this type of a situation."
"The single-pane view provides us a view of all of our network infrastructure, and it is one of the most important tools that we use to see the status of our customers' networks."
"We have a single GUI where we can view the status of all our infrastructure."
"This is a very good solution and it is simple to use, for any company."
"Nagios XI is a simple monitoring tool with performance management."
"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."
"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."
"The solution's most valuable feature is its simplicity."
"We love Nagios XI due to the fact that JPS Web is very useful."
"The most valuable feature is the monitoring of processes."
"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."
"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."
"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."
"The API makes it pretty easy to integrate with any system."
"We can also observe whatever we want, and there are no limitations."
"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. The logger is a part of the software, but it's not the most important point of it."
 

Cons

"To get it started is a lot of work, since it comes empty. We had to push information into it to make it work."
"Sometimes, when the GUI and some of the search fields are being reset, and I return to the page, then I have to set them again. Therefore, some improvement on the UI and the filtering is needed."
"During the initial setup we faced some issues. Part of it was because we had to become more knowledgeable in the solution. There are some gray areas and if you don't know the product well you may have issues. Another part of it was some bugs that we came across, although that's part of every software solution in IT nowadays. But the initial setup could be easier."
"I would like to see a better UI, one which is more responsive."
"Sometimes, Centreon does not show the status of services as updated, which should be addressed."
"Centreon technical support is only available during Central European business hours. When it comes to critical business solutions, there should be a 24/7 hotline that customers can rely on."
"Improvements are needed in the area of cloud monitoring, as that's a newer feature."
"Centreon introduced network discovery in the most recent update. However, it doesn't work well. Our previous monitoring tool could discover networking equipment on the network and identify the relationships between the devices."
"The product does not have SAP monitoring."
"The interface could be more user-friendly."
"Nagios XI can improve its GUI for users with a new look."
"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 product's stability could be even better."
"There's room for improvement in the visibility, and in the ability to extract information. Stuff like this should be more simple."
"We often need to develop custom plugins to get Nagios to work the way we want it to work because the features we need are not always available in Nagios."
"I would like to see more customization in the network map because it is a bit tricky to use it."
"The user interface is not what we are used to these days, and should be improved."
"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."
"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."
"We do not get performance reports properly."
"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 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."
 

Pricing and Cost Advice

"It's quite expensive when you use the Enterprise version, but if you compare it to other providers, it's more like a middle-of-the-line product. It's always good to have a price that is lower, but I would say the price is okay because we get very good support and if we have any other issues we can always contact them. There has never been a time when I didn't get help from them."
"The price is not too high. Licensing is driven by how many hosts you monitor, but because you can run the agentless version, you don't have to declare every host to Centreon, one at a time. That means you can drive your infrastructure supervision with a very low number of declared hosts."
"In terms of licensing, you have to think through if the components that need licensing are really needed. For example, the Map module: If you don't need a map to be shown, I don't see a point in paying for those licenses, if you just use it a couple of times a month or a couple of times a week... You can use the Centreon free version and get the main features. The licensing part is, I would say, only for bigger customers who have the option to pay more and who really need those kinds of modules, fancy reports, etc."
"Centreon is an open source product. Thus, there is no need for licensing."
"I think Centreon's pricing is fair, especially given the criticality of our system. They were cheaper than the other solutions. The licensing terms were pretty straightforward. I believe it was based on the number of hosts."
"The pricing starts at around 5000 euro. However, this depends on: Your environment, the size of your host, how many hosts you have, how many remote pollers you have, and if you want to use the Monitoring Business Intelligence or Centreon MAP functionalities."
"The solution is very effective, despite the low price."
"I would like to see improvement in the licensing model. You can purchase X number of licenses, up to 1,000 devices or 1,000 instances. Your next batch is 2,000. But what if you only need, say, 1,200? The model could be changed a little bit."
"The licensing fees for this solution are approximately $3,000 USD per year."
"Nagios XI is open source."
"For the cost of the commercial product and support, and taking into account the open source characteristics of it, I believe it is difficult to a better value."
"As it is not an agentless tool, I think it is expensive."
"The pricing is high with separate licensing for the product and support."
"Nagios Core does not have any payment, but Nagios XI requires payment for the license."
"We are using the free version of this solution."
"The pricing is really cost efficient. The licensing is perpetual and can be renewed very easily."
"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
18%
Government
9%
Financial Services Firm
8%
Comms Service Provider
7%
Computer Software Company
12%
Financial Services Firm
11%
Manufacturing Company
9%
Government
8%
Government
18%
Manufacturing Company
11%
Financial Services Firm
9%
Computer Software Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise5
Large Enterprise14
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 Centreon?
Centreon's pricing is not very expensive. Initially, I rated it seven, but corrected to five out of ten.
What needs improvement with Centreon?
I have certain concerns with Centreon, such as being unable to set downtime for multiple devices at once due to the l...
What is your primary use case for Centreon?
We are using Centreon for monitoring devices, both LAN and WAN devices. There are subsidiaries for my company, so if ...
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 thems...
What needs improvement with OP5 Monitor?
OP5 Monitor could include application monitoring in addition to infrastructure monitoring. If application business tr...
What is your primary use case for OP5 Monitor?
Our previous use case for OP5 Monitor was server monitoring.
 

Comparisons

 

Overview

 

Sample Customers

Airbus, Bollore, BT, Canal Plus, Kuehne Nagel, Limagrain, LVMH, Oberthur Technologies, Orange, Darty, Addax Petroleum, Plastic Omnium, Auchan, Valeo, Saint Gobin, Clarins, Hugo Boss, JC Decaux, French Government (Defense, Justice, Environment, Agriculture), OptiComm, Thales, Zeiss.
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 Zabbix, Auvik, SolarWinds and others in Network Monitoring Software. Updated: September 2025.
868,654 professionals have used our research since 2012.