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Nagios Core vs vRealize Network Insight 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:
 

ROI

Sentiment score
8.8
Nagios Core reduces downtime and costs with quick alerts, providing full ROI and eliminating expensive monitoring tools.
Sentiment score
1.0
vRealize Network Insight improved efficiency and reduced costs, achieving labor and hardware savings and enhancing problem-solving and network mapping speed.
 

Customer Service

Sentiment score
5.1
Nagios Core relies on community support, praised for stability and resources, but lacks official help compared to Nagios XI.
Sentiment score
4.0
vRealize Network Insight's customer support is generally praised but noted for delays and challenges, especially post-Broadcom acquisition.
It's difficult to find necessary documentation, open tickets, and get support.
Virtualization Specialist at a computer software company with 51-200 employees
We are paying too much for technical support from VMware.
Senior System Specialist at General Directorate of Residence and Foreigners Affairs (GDRFA)
 

Scalability Issues

Sentiment score
6.7
Nagios Core shows scalability for large networks but may need customizations and integrations for distributed environments.
Sentiment score
7.6
vRealize Network Insight is scalable, adaptable, and efficient, praised for ease of expansion and varied organizational adaptability.
 

Stability Issues

Sentiment score
8.2
Nagios Core is highly stable and reliable with minimal footprint, supporting extensive monitoring without network burden.
Sentiment score
1.0
vRealize Network Insight is praised for stability, with rare minor Web UI glitches, staying robust during upgrades and deployments.
I tried many other solutions at work, however, in terms of Nagios, I haven't seen any disruption or downtime.
Senior System Administrator at Interactive Group
We are managing that one but usually we have an API connector between our firewall vendor and our VMware NSX.
Senior System Specialist at General Directorate of Residence and Foreigners Affairs (GDRFA)
 

Room For Improvement

Nagios Core needs a more intuitive interface, better scalability, and features like enhanced reporting and integration with modern tools.
vRealize Network Insight requires enhanced integration, user-friendly features, better support, intuitive reports, and improved interoperability for complex cloud deployments.
Broadcom should improve by going back to what was working before, offering the suite of tools that clients actually use, and allowing clients to decide the best options for them.
Virtualization Specialist at a computer software company with 51-200 employees
 

Setup Cost

Nagios Core is a free, cost-effective open-source tool, but requires Linux expertise and incurs hosting and maintenance costs.
vRealize Network Insight is valued for features and stability but seen as costly, especially in larger or bundled setups.
Broadcom is known for increasing product prices, making them expensive compared to what people used to pay.
Virtualization Specialist at a computer software company with 51-200 employees
 

Valuable Features

Nagios Core provides flexible, low-resource monitoring with customization, automation, efficient alerts, and integration support for reliable IT performance visibility.
vRealize Network Insight provides comprehensive network visualization, monitoring, automation, and security enhancement with user-friendly interfaces and customization.
You can monitor anything.
Senior System Administrator at Interactive Group
One of the biggest problems with VMware NSX is logging, and vRealize Network Insight helps by providing comprehensive logs.
Virtualization Specialist at a computer software company with 51-200 employees
 

Categories and Ranking

Nagios Core
Ranking in Network Monitoring Software
10th
Ranking in IT Infrastructure Monitoring
11th
Average Rating
8.2
Reviews Sentiment
7.0
Number of Reviews
51
Ranking in other categories
No ranking in other categories
vRealize Network Insight
Ranking in Network Monitoring Software
34th
Ranking in IT Infrastructure Monitoring
38th
Average Rating
8.6
Reviews Sentiment
6.0
Number of Reviews
47
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of January 2026, in the IT Infrastructure Monitoring category, the mindshare of Nagios Core is 2.4%, down from 3.6% compared to the previous year. The mindshare of vRealize Network Insight is 0.7%, up from 0.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
IT Infrastructure Monitoring Market Share Distribution
ProductMarket Share (%)
Nagios Core2.4%
vRealize Network Insight0.7%
Other96.9%
IT Infrastructure Monitoring
 

Featured Reviews

HY
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.
Shaijith KB - PeerSpot reviewer
Senior System Specialist at General Directorate of Residence and Foreigners Affairs (GDRFA)
Comprehensive management and detailed reports benefit operations while improvements are needed in support and maintenance
We have Tanzu and OpenShift. We have OpenShift, Canonical, and the Tanzu one. The Tanzu platform from VMware is a Kubernetes platform. We haven't completely installed Tanzu yet; we installed the vROps part. vRealize Network Insight is beneficial because you can control the East-West traffic. vRealize has a component called NSX, which has East-West traffic controlling and micro-segmentation, that is one of the best options, and we have the layer extension, layer 2 extension possible through NSX. If you have anything accountable in any business, even in a candy business, having proper accountability on what you are selling and buying will save a lot. If you don't know what you're selling and buying, you will end up with a loss. My team does not use the flow analytics feature; we have a security and network monitoring team, which is a different SOC team. I am using it as an administrator internally. We perform different tasks including costing analysis, capacity management, and many other things. vRealize Network Insight has a concern about the maintenance part, as it requires a person to monitor it completely. It's not something you install and your report will be generated automatically. You have to work on this properly to get the insights. vRealize Network Automation, vRealize Operations, and vRealize Network Insight are completely related to the network. I cannot say much about these network aspects because I am on the operations side, but overall, the vRealize suite is good for reporting perspective or any ISO-related documentation; this is very helpful. The product is called vRealize Operations Manager, and now it is referred to as Aria or vAria. I am now a Senior System Specialist. We use different metrics because we have multiple departments, and we can monitor utilization and comparisons with the previous year. On a scale of one to ten, I rate this solution a seven.
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Top Industries

By visitors reading reviews
Computer Software Company
12%
Manufacturing Company
10%
Comms Service Provider
9%
Government
8%
Manufacturing Company
13%
Computer Software Company
12%
Healthcare Company
8%
Government
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise11
Large Enterprise22
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise9
Large Enterprise41
 

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.
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.
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...
What do you like most about vRealize Network Insight?
The tool's ease of configuration and use and the availability of information and artifacts through professional services and the web are key factors that customers find valuable.
What is your experience regarding pricing and costs for vRealize Network Insight?
In VMware you have to buy a separate license for it. We have VVF and VCF-type of licenses, and if you want to go with this NSX and sort of higher-end professional services, you need to go with VCF....
What needs improvement with vRealize Network Insight?
There is room for improvement as not all cases are getting resolved, and we often do not get L3 support directly, having to go through L1 and L2, resulting in delays that usually are a headache for...
 

Also Known As

No data available
Arkin
 

Overview

 

Sample Customers

Airbnb, Cisco, PayPal, FanDuel
NTTi3, VCIX-NV, VMware Networking and Security Business Unit, Illumio, CompuNet
Find out what your peers are saying about Nagios Core vs. vRealize Network Insight and other solutions. Updated: December 2025.
879,711 professionals have used our research since 2012.