NETSCOUT InfiniStreamNG vs Nagios Core comparison

Nagios and NETSCOUT are both solutions in the Network Monitoring Software category. Nagios is ranked #10 with an average rating of 8.7, while NETSCOUT is ranked #77. Nagios holds a 1.9% mindshare in NMS, compared to NETSCOUT’s 0.5% mindshare. Additionally, 80% of Nagios users are willing to recommend the solution, compared to 92% of NETSCOUT users who would recommend it.

Nagios Core

Read 51 Nagios Core reviews

4,463 Views
3,749 Comparison Views

80% willing to recommend

NETSCOUT InfiniStreamNG

Read 13 NETSCOUT InfiniStreamNG reviews

957 Views
938 Comparison Views

92% willing to recommend

Nagios Core

NETSCOUT InfiniStreamNG

Comparison Buyer's Guide

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Executive SummaryUpdated on Oct 10, 2024

Nagios Core and NETSCOUT InfiniStreamNG compete in network performance monitoring. Nagios Core is favored for its affordability while NETSCOUT InfiniStreamNG stands out for its comprehensive feature set, providing justified investment returns.

Features: Nagios Core supports robust network monitoring, alerting capabilities, and benefits from numerous community plugins. NETSCOUT InfiniStreamNG offers advanced traffic analysis, packet capture capabilities, and application performance management.

Room for Improvement: Nagios Core could improve with easier setup processes and more formal support channels. Its customization options might seem daunting for users seeking out-of-box solutions. NETSCOUT InfiniStreamNG might enhance its offering by lowering entry-level pricing, expanding community plugin options, and simplifying some in-depth features for greater accessibility.

Ease of Deployment and Customer Service: Nagios Core requires a potentially complex setup with community-driven support, considered less formal. NETSCOUT InfiniStreamNG provides streamlined deployment and professional support services, emphasizing enterprise-grade customer assistance.

Pricing and ROI: Nagios Core has a minimal setup cost, appealing to budget-conscious firms while offering a high ROI via low operating expense. NETSCOUT InfiniStreamNG has a higher initial investment, justified by extensive insights and analytics, delivering substantial ROI for organizations needing detailed performance data.

To learn more, read our detailed NETSCOUT InfiniStreamNG vs. Nagios Core Report (Updated: December 2025).

Buyer's Guide

NETSCOUT InfiniStreamNG vs. Nagios Core

December 2025

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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 Core

Ranking in Network Monitoring Software

10th

Average Rating

8.2

Reviews Sentiment

7.0

Number of Reviews

Ranking in other categories

IT Infrastructure Monitoring (11th)

NETSCOUT InfiniStreamNG

Ranking in Network Monitoring Software

77th

Average Rating

8.4

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of January 2026, in the Network Monitoring Software category, the mindshare of Nagios Core is 1.9%, down from 3.0% compared to the previous year. The mindshare of NETSCOUT InfiniStreamNG is 0.5%, up from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Network Monitoring Software Market Share Distribution
Product	Market Share (%)
Nagios Core	1.9%
NETSCOUT InfiniStreamNG	0.5%
Other	97.6%

Network Monitoring Software

Featured Reviews

Husham Yaqoob

Senior System Administrator at Interactive Group

Monitoring solution provides comprehensive visibility across IT infrastructure

The good thing about Nagios Core is it covers everything. Everything in the IT domain, you can monitor anything. You can even monitor printers, the ports of printers, Core workstations, and storage. You can monitor the workflow Core and the utilization of computes. If you want to grasp everything of your IT equipment on a single interface, you can use Nagios. It's the best one. It provides dashboards, and you can also configure your emails and alerts with it. If something is critical, you can configure it to notify via emails. It has a very handy dashboard, providing live alerts and visibility for everything.

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Michael Gideon Genita

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…

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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 of Nagios Core is the ability to check the availability of the server for network connectivity. Additionally, the interface is good."

"Nagios Core integrates with tools like Splunk, Datadog, or Dynatrace. It is usually used as a feed to provide more technical information about devices or hosts to another system."

"The most valuable features are the reports and the way it generates the report in a graphical manner."

"Key features include the GUI interface, its notification capabilities, and the real-time reporting."

"Monitoring with Nagios Core is helpful because it provides immediate alerts if something goes down, such as a server, or wireless router, or if there's a cable break. This allows us to respond promptly to any issues."

"Nagios Core is stable."

"It is fairly easy to set up, and we can monitor pretty much everything we want to."

"What I like about Nagios Core is that it helps me ensure everything is running smoothly by checking the status of hosts and services."

More Nagios Core pros

"It has cut our troubleshooting down by days. Once we have a product in place, we show people examples of how it can streamline their troubleshooting process."

"It's an easy product to set up."

"We use it for monitoring whenever we update a new circuit or site."

"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 tool has the ability to look back within a month's data. It is very easy to navigate within the tool and troubleshoot the problem, compared to other solutions that we've used in the past."

"The real-time troubleshooting and application segregation that you can do within it."

"The most valuable features are speed and cost."

"The ability to troubleshoot customers' connectivity has been very beneficial."

More NETSCOUT InfiniStreamNG pros

Cons

"Nagios Core could improve by adding a user interface. If you want the user interface you have to use Nagios XI."

"It is a bit slow due to latency."

"Bandwidth monitoring is the pain point for me because Nagios Core does not monitor bandwidth effectively like Cacti does."

"t was a little hard to get our setup represented in the configuration."

"The UI is a little outdated and graphics could be displayed in a better way."

"The NetEase reporting structure needs improvement, especially the availability report, which is weak."

"The initial setup process could be easier."

"It would be nice if the company offered a sales or contract manager that was dedicated to our company so that we would have some sort of link to Nagios, and if we had issues or questions, we'd be able to contact them directly."

More Nagios Core cons

"The technology goes end-of-life on us every year, which is why I am looking forward to vSTREAM. I don't like when devices go end-of-life on us so quickly. If we can get more of an advanced notice of when an end-of-life is brought up, because our certification process within the organization takes a while."

"Being able to manage the packet flow switches in nGeniusONE would be great."

"We don't use the single pane of glass view, even though we own it."

"The NetFlow Collectors could handle more flows per minute."

"There is a timeout feature that we have been asking for awhile."

"The stability depends on who is using the tool, because you only can get as much out of the tool as you put into it. There are a lot of patches for this particular environment, so you have to keep on them. If you lose track of them, then the product is not useful anymore."

"I would like to see an improved level of stitching between IPs."

"Only problems that we have had are fiber issues going into the TAPs or vSTREAMs, which are usually local site issues."

More NETSCOUT InfiniStreamNG cons

Pricing and Cost Advice

"It's free."

"We are using the free version."

"We are using the open-source, unpaid version."

"Nagios Core is free to use."

"We have saved a lot of time, money, and effort in reducing disaster times, which is owed to Nagios quick alerting."

"Most the plugin features are free."

"It's free."

"The enterprise version has technical support. The version we are using is free."

More Nagios Core pricing and cost advice

"To capture more with the solution that we bought, you have to buy another InfiniStreamNG, and there are only four ports in the back."

"This product could be cheaper."

"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."

"I would like it to be more scalable with less spend."

"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."

"The price is a little high."

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Top Industries

By visitors reading reviews

Computer Software Company

11%

Manufacturing Company

10%

Comms Service Provider

Government

Manufacturing Company

17%

Financial Services Firm

17%

Government

Energy/Utilities Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	20
Midsize Enterprise	11
Large Enterprise	22

By reviewers
Company Size	Count
Midsize Enterprise	1
Large Enterprise	8

Questions from the Community

What is your experience regarding pricing and costs for Nagios Core?

Nagios Core is a free and open-source product. We don't charge for the product itself, but we charge for the man-hour costs related to installation, configuration, ongoing operation, and maintenance.

See all answers

What needs improvement with Nagios Core?

The dashboard should be improved. It's very simple. I don't have a very clear or specific suggestion. You can change the skin of the dashboard, however, it's good for me.

See all answers

What is your primary use case for Nagios Core?

I was a senior system administrator. I've been using Nagios Core for more than ten years now. It can be used to monitor hosts, such as machines, and monitor services of any kind. I'm using it to mo...

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Comparisons

Icinga vs Nagios Core

Compared 11% of the time

Zabbix vs Nagios Core

Compared 7% of the time

Nagios XI vs Nagios Core

Compared 7% of the time

LibreNMS vs Nagios Core

Compared 6% of the time

Centreon vs Nagios Core

Compared 5% of the time

More Nagios Core Competitors

Riverbed NPM+ vs NETSCOUT InfiniStreamNG

Compared 19% of the time

Cisco Secure Network Analytics vs NETSCOUT InfiniStreamNG

Compared 15% of the time

NETSCOUT nGeniusONE vs NETSCOUT InfiniStreamNG

Compared 14% of the time

Flowmon vs NETSCOUT InfiniStreamNG

Compared 13% of the time

cPacket cClear vs NETSCOUT InfiniStreamNG

Compared 11% of the time

More NETSCOUT InfiniStreamNG Competitors

Product Reports

Buyer's Guide

Nagios Core

January 2026

Download Nagios Core product report

Buyer's Guide

NETSCOUT InfiniStreamNG

January 2026

Download NETSCOUT InfiniStreamNG product report

Also Known As

No data available

InfiniStreamNG, NETSCOUT ISNG, Infinistream

Overview

This is IT infrastructure monitoring's industry-standard, open-source core. Free without professional support services.

Nagios

NETSCOUT’s new ISNG platform harnesses the power of IP intelligence by mining traffic in real-time to deliver accurate and actionable data for service assurance, cybersecurity and business intelligence applications. The InfiniStreamNG platform fully supports the nGeniusONE and Iris application suites.

NETSCOUT

Sample Customers

Airbnb, Cisco, PayPal, FanDuel

U.S. Department of Defense

Buyer's Guide

NETSCOUT InfiniStreamNG vs. Nagios Core

December 2025

Free Report: NETSCOUT InfiniStreamNG vs. Nagios Core

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