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Nagios XI vs Opsview vs PRTG Network 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 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 Opsview is 0.4%, up from 0.4% compared to the previous year. The mindshare of PRTG Network Monitor is 4.2%, down from 4.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Monitoring Software Market Share Distribution
ProductMarket Share (%)
PRTG Network Monitor4.2%
Nagios XI3.1%
Opsview0.4%
Other92.3%
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.
Jeff Cronstrom - PeerSpot reviewer
A highly stable solution that can be used to monitor system availability
The most valuable feature of Opsview is the ability to clone the services when you're monitoring something out of the test setup. You can clone that service, and it allows you to add new services quickly. You can bring up new servers, and you can easily add them. Also, there's an API to be able to add services as well. We don't use the API. We mostly use the cloning function because it stores everything in a back-end database. The underlying monitoring platform for our version is Nagios. That's where we upgraded from Nagios to Opsview.
Noman-Saleem - PeerSpot reviewer
Detects suden changes but significant pricing concerns affect the effectiveness of network traffic troubleshooting
We use PRTG Network Monitor for monitoring traffic on interfaces and the behavior of network traffic. If there are sudden changes in traffic or any configuration issues, we can sort them out using PRTG. It's very helpful for troubleshooting and monitoring traffic utilization on our interfaces…

Quotes from Members

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

Pros

"BPI: It allows defining peripherals to map business criticality for efficient monitoring, as required."
"The alerting system is very effective."
"Nagios XI is easy to install, which sets it apart from other open-source solutions I've tried."
"I can monitor a software made in-house to software of bigger companies."
"The features I've found the most useful are the plug-ins, the fact that you can connect almost everything to it. That's very useful."
"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 dashboard allows you to see what's going on in the overall system."
"Though I downplayed the administrative NCC GUI, this is by far the strongest aspect of the Nagios XI product."
"We use this solution for internal monitoring our own cloud platform because we are a public cloud provider. We also use it for monitoring purposes on behalf of our clients."
"The most valuable feature of Opsview is the ability to clone the services when you're monitoring something out of the test setup."
"It's a good solution. It covers all aspects of monitoring purposes."
"What was very compelling about OpsView was that we could dial out the noise and have meaningful and actionable alerts."
"I am satisfied with the overall product since it works well…It is a stable solution."
"The most valuable features of PRTG Network Monitor are user-friendly, and the graphical interface is good for all the network devices that are mapped in this organization. It's very easy to find reports for any devices that we are looking for."
"PRTG is simple to manage. First, you can create a template for a device, then apply it to hundreds of similar devices. That's a great advantage."
"The sensors and remote probes are phenomenal. We use them for all of our global sites. The problem with our global sites are that they are all VPNs. If the link goes down, you can't monitor other solutions, as it just goes off the grid. Having remote probes allows them to still carry on and get the information that we need when it comes back up, sending the information to us."
"One of its valuable features is the fact that it handles multiple operating systems... And I like the fact that it tells me when things are about to fall over, which means I can preempt it and not have to wake up at three in the morning to fix it."
"Good compilation of the system's information."
"PRTG has improved our visibility and response time to issues related to remote sites."
"The bandwidth monitoring is a very attractive feature, it can tell you the bandwidth utilization while it is attempting to connect to the host for feedback."
"I would boldly say that this is the most scalable network monitoring tool that I know of"
 

Cons

"It is really difficult to integrate Nagios XI with another system to generate logs and alert our management of failures in security infrastructure."
"It can be quite difficult to know which drivers and agents to use when setting up."
"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 a much easier GUI so that I can delete events and logs, which will free up a lot of space."
"I would like to see more customization in the network map because it is a bit tricky to use it."
"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."
"Nagios XI can improve its GUI for users with a new look."
"They need more documentation for the plugins."
"Some of the graphics on Opsview could be improved."
"Pricing and a few certain aspects in the solution needs to be improved."
"Maybe the graphical representation can be improved. It can be enhanced for better visualization. It could be a little better. And the graph center can be improved."
"In a future release, we would like to have Observ for AI. Any AI and intelligence it can add to the monitoring is obviously beneficial. We would also like to have automated callouts."
"Customized reporting can be improved."
"There is room for improvement in this solution for the performance and third-party monitoring protocols. They need to be updated to the latest ones."
"Scalability is the only major sticking point for me. There is a recommended number of sensors, which is around 10,000 and we're double that... The only option we have to scale is to buy another core, which would be a separate, stand-alone instance..."
"While the desktop app is good, they could slightly improve it. We would like it to be a single pane of glass. At the moment, you can only see certain portions of information. You have to scroll through to make it more granular. We want them to develop the desktop app to be more user-friendly."
"PRTG Network Monitor could improve by having descriptions for the tab usages. The dashboards or interface could be easier to understand."
"They just released a newer version of the desktop app, a beta version, that I have been trialing out. I prefer the older version, only because of how the layout is designed"
"Maybe in the future there will be room for improvement, but currently, there is nothing pressing that I can think of"
"We would like more cloud native sensors for AWS, Azure, Google Cloud, etc. A lot of businesses are moving in that direction, so having something where we can pull performance stats out of these cloud services would be great for us."
"There seems to be a big jump from the basic scan to the really thorough scan. There is a big jump in the quantity of sensors it uses for certain things. One minute you might get ten and then the next you get 200. There seems to be a big jump between the two at times."
 

Pricing and Cost Advice

"You can grow into the higher-priced scale as they learn how to utilize the features for Nagios XI."
"It is good to contact experts for advice about what is the best solution for your specific infrastructure and enterprise."
"For our country in North Africa, it's expensive and we could purchase another solution for that price. But it's a reasonable price if we're speaking in international terms."
"Nagios XI is an expensive solution."
"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."
"Licensing costs are reasonable."
"The licensing fees for this solution are approximately $3,000 USD per year."
"The solution is not cheap. I think that the pricing is a little bit on the high side."
"I would rate pricing a seven out of ten, where ten is the highest price."
"The solution is priced similarly to other tools offering similar features."
"We are licensed for 2500 endpoints."
"Right now, the smallest sensor pack that they have is just a bit out of range for me, as a business. This kills me, as I need the product. Therefore, there is always a balance between needing to buy it or continuing their free version."
"Licenses are very expensive, so I would like to see cheaper licensing."
"The scalability is there, but smaller companies might need CAM software to be able afford the product."
"The price of PRTG Network Monitor is reasonable for the features that the solution provides. They charge you per monitoring, not per node, it is per port that you need for a device."
"PRTG Network Monitor's price is a little high."
"The licensing fees are billed annually and there are no costs in addition to this."
"We bought a license for 4000 sensors."
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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%
Government
9%
Manufacturing Company
8%
Computer Software Company
19%
Manufacturing Company
9%
Financial Services Firm
7%
Performing Arts
7%
Computer Software Company
13%
Government
9%
Financial Services Firm
8%
Comms Service Provider
7%
 

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 Business11
Midsize Enterprise5
Large Enterprise9
By reviewers
Company SizeCount
Small Business54
Midsize Enterprise18
Large Enterprise37
 

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 do you like most about Opsview Monitor?
The most valuable feature of Opsview is the ability to clone the services when you're monitoring something out of the...
What needs improvement with Opsview Monitor?
Some of the graphics on Opsview could be improved.
What is your primary use case for Opsview Monitor?
Opsview is used to monitor system availability, whether its service is running on disk usage, CPU usage, etc.
What is the best network monitoring software for large enterprises?
PRTG network monitor is one of the best tool i have ever used for the monitoring. It have auto discovery option. it a...
What do you like most about PRTG Network Monitor?
The tool is integrated with our email for the alerts.
What is your experience regarding pricing and costs for PRTG Network Monitor?
The pricing is in the middle. It's not too high, nor too low, but it's reasonable.
 

Comparisons

 

Also Known As

No data available
Opsview Monitor, Opsview Enterprise
No data available
 

Overview

 

Sample Customers

Nagios has over one million users globally, including AOL, DHL, McAfee, MCI, MTV, Yahoo!, Universal, Toshiba, Sony, Siemens, and JPMorgan Chase.
IBM, BT, Cisco, Sky, UPS, Capgemini, Visolit, Fujitsu Services UK, UKCloud, Massachusetts Insitute of Technology, Cornell University, Incomm
Jameson Bank, Sidnix, RungeICT, MedicalAnimal, Truck-lite, GamingGrids, The Covell Group, Forsythn County Schools, NetMass, Musgrove Park Hospital, Lanes Health, Columbia Southern University, Vodafone, Intrust Bank
Find out what your peers are saying about Zabbix, Auvik, SolarWinds and others in Network Monitoring Software. Updated: August 2025.
866,561 professionals have used our research since 2012.