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NETSCOUT InfiniStreamNG vs Nagios XI comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Oct 10, 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
16th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
58
Ranking in other categories
Server Monitoring (9th), IT Infrastructure Monitoring (17th), Cloud Monitoring Software (20th)
NETSCOUT InfiniStreamNG
Ranking in Network Monitoring Software
75th
Average Rating
8.4
Number of Reviews
13
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of May 2026, in the Network Monitoring Software category, the mindshare of Nagios XI is 2.5%, down from 3.3% compared to the previous year. The mindshare of NETSCOUT InfiniStreamNG is 0.5%, up from 0.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Monitoring Software Mindshare Distribution
ProductMindshare (%)
Nagios XI2.5%
NETSCOUT InfiniStreamNG0.5%
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.
Michael Gideon Genita - PeerSpot reviewer
Associate System Engineer at SMS Global Technologies, Inc.
Easy to set up with good documentation and helpful support
I'm using it for a customer The packet flow switch is the most valuable aspect of the solution.  It's an easy product to set up. We can scale the solution if we need to. It's stable.  The documentation is well-written and quite useful. It's compatible with other products.  Under the pocket flow…

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."
"I would recommend this solution because it's so powerful with no limitation, especially when using the XI version."
"Our infrastructure is now under monitoring proactively and we don't have to wait for complaints from the customers or internal operation team to inform regarding any issue with the service."
"The technical support is good."
"The most valuable feature is the dashboard, where I can have a single screen that provides a summary for hundreds of servers."
"The solution is pretty stable."
"Nagios is the best monitoring tool that I have ever worked on."
"BPI: It allows defining peripherals to map business criticality for efficient monitoring, as required."
"The product is stable. I have never had any issue where we have lost an InfiniStream, or visibility from that particular InfiniStream, throughout the bank."
"The technical support is really good. They will go above and beyond, if you are running into a problem. You can go to a sales engineer, who will engage technical support to help you out."
"We are attracting customers in good sized numbers as we advertise and market this solution."
"The solution has helped to increase application and network uptime, reduced our mean time to repair significantly for application and network issues, and cut our overall troubleshooting time from an hour down to five minutes."
"From a troubleshooting perspective, it allows us to quickly search all data TAP points in the network and helps our network engineers get to root cause quickly."
"This solution has cut our overall troubleshooting time, sometimes going down to a few hours over what might have taken one to two days to fully troubleshoot an issue, and it has helped to increase our application uptime as we try to keep the five nines."
"Go with NETSCOUT."
"Because we are doing proactive monitoring instead of reactive, the end users don't even see that there is something wrong."
 

Cons

"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."
"We'd like to see more integration capabilities."
"The way Nagios displays information isn't easy for a new user to understand. It's not intuitive enough."
"Technical support is very good but is very expensive. It is becoming more and more expensive just like the upgrade."
"The product could be optimized to improve the administrative user experience via the Nagios Core Configuration (NCC) GUI module."
"The tool's AI model needs to be fixed."
"It can be quite difficult to know which drivers and agents to use when setting up."
"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. But in the end, you learn to live with it."
"The scalability has some limitations and quirks to it. I would like to be able to upgrade rather than replace the whole thing."
"There is a timeout feature that we have been asking for awhile."
"The technology goes end-of-life on us every year, which is why I am looking forward to vSTREAM."
"Sometimes, we can't access it."
"The NetFlow Collectors could handle more flows per minute."
"The single pane of glass feed still needs work."
"Only problems that we have had are fiber issues going into the TAPs or vSTREAMs, which are usually local site issues."
"It can be scalable. It just costs too much."
 

Pricing and Cost Advice

"You can grow into the higher-priced scale as they learn how to utilize the features for Nagios XI."
"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."
"Nagios XI is an expensive solution."
"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."
"Nagios Core does not have any payment, but Nagios XI requires payment for the license."
"Licensing costs are reasonable."
"The licensing fees for this solution are approximately $3,000 USD per year."
"It can be scalable. It just costs too much. With a company as big as ours, it gets too expensive to accommodate every single site."
"The price is a little high."
"This product could be cheaper."
"The scalability is good, but it comes at a cost. E.g., if you need 100 InfiniStream because you are sending gigs or terabytes of data to one InfiniStream, then you will have to purchase another InfiniStream, which are not cheap."
"I would like it to be more scalable with less spend."
"To capture more with the solution that we bought, you have to buy another InfiniStreamNG, and there are only four ports in the back."
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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
8%
Comms Service Provider
7%
Manufacturing Company
7%
Manufacturing Company
16%
Financial Services Firm
13%
Construction Company
9%
Government
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
Midsize Enterprise1
Large Enterprise8
 

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...
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Also Known As

No data available
InfiniStreamNG, NETSCOUT ISNG, Infinistream
 

Overview

 

Sample Customers

Nagios has over one million users globally, including AOL, DHL, McAfee, MCI, MTV, Yahoo!, Universal, Toshiba, Sony, Siemens, and JPMorgan Chase.
U.S. Department of Defense
Find out what your peers are saying about NETSCOUT InfiniStreamNG vs. Nagios XI and other solutions. Updated: April 2026.
894,738 professionals have used our research since 2012.