ITRS Geneos vs Nagios Core comparison

ITRS and Nagios are both solutions in the Network Monitoring Software category. ITRS is ranked #74 with an average rating of 5.0, while Nagios is ranked #10 with an average rating of 8.7. ITRS holds a 0.6% mindshare in NMS, compared to Nagios’s 1.7% mindshare. Additionally, 96% of ITRS users are willing to recommend the solution, compared to 80% of Nagios users who would recommend it.

ITRS Geneos

Read 57 ITRS Geneos reviews

5,390 Views
1,886 Comparison Views

96% willing to recommend

Nagios Core

Read 51 Nagios Core reviews

6,461 Views
5,298 Comparison Views

80% willing to recommend

ITRS Geneos

Nagios Core

Comparison Buyer's Guide

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Executive SummaryUpdated on Oct 9, 2024

ITRS Geneos and Nagios Core are competitors in the monitoring solutions category. ITRS Geneos seems to have the upper hand with its real-time insights and extensive integration capabilities, while Nagios Core offers flexibility with significant customization through its open-source platform.

Features: ITRS Geneos provides real-time monitoring with comprehensive integration capabilities and customizable dashboards. It offers real-time insights and issue prediction to reduce latency. Nagios Core, as an open-source solution, allows significant customization and supports various monitoring needs. It offers infrastructure monitoring and rudimentary application checks.

Room for Improvement: ITRS Geneos needs enhanced historical data reporting and better cloud monitoring. Users seek improved middleware integration and dashboard flexibility. Nagios Core should address its steep learning curve due to the complex configuration process, and users desire a more user-friendly UI and cloud integration.

Ease of Deployment and Customer Service: ITRS Geneos mainly supports on-premises installations with recognized customer service proficiency, though faster response times are desired. Nagios Core supports on-premises and hybrid environments with a community-driven support model, fostering self-sufficiency due to limited direct vendor support.

Pricing and ROI: ITRS Geneos, noted for its higher cost, is justified by its capabilities and customizability, proving beneficial in environments where downtime is costly. Nagios Core is a free solution, avoiding licensing costs but may require significant investment in customization to match commercial offerings. It is resource-intensive due to specialized configurations for effective setup.

To learn more, read our detailed ITRS Geneos vs. Nagios Core Report (Updated: April 2026).

Buyer's Guide

ITRS Geneos vs. Nagios Core

April 2026

Download the complete report

Helped 886,011 peers since 2012

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

ITRS Geneos

Ranking in Network Monitoring Software

74th

Ranking in IT Infrastructure Monitoring

50th

Average Rating

8.2

Reviews Sentiment

7.1

Number of Reviews

Ranking in other categories

Application Performance Monitoring (APM) and Observability (48th)

Nagios Core

Ranking in Network Monitoring Software

10th

Ranking in IT Infrastructure Monitoring

10th

Average Rating

8.2

Reviews Sentiment

7.3

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of April 2026, in the Network Monitoring Software category, the mindshare of ITRS Geneos is 0.6%, up from 0.6% compared to the previous year. The mindshare of Nagios Core is 1.7%, down from 3.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Network Monitoring Software Mindshare Distribution
Product	Mindshare (%)
Nagios Core	1.7%
ITRS Geneos	0.6%
Other	97.7%

Network Monitoring Software

Featured Reviews

reviewer2127225

Monitoring Specialist at a financial services firm with 51-200 employees

Does real-time monitoring, prevents failures, and has a reasonable price

Their cloud monitoring solution needs to be improved. I have already given them the feedback that it's not capable of meeting the latest technology needs. It's built like proprietary software. I can't expose the data to ITRS, and similarly, ITRS can't expose the data to the outside world. They have created a boundary. It's a bit binding solution. In the modern world, people like to be able to expose the data to do whatever they want. They can query the data, send it, or pull it. ITRS needs to provide more in terms of the API offering. They have documentation, but they can improve the documentation and provide videos to show how to do monitoring configuration or deployment.

Read full review

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.

Read full review

Quotes from Members

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

Pros

"Customer service delivered by ITRS is to the highest standards from all points of view."

"It's catching things that are going wrong before they become catastrophic, in most cases."

"This tool allows one to analyse, integrate and customize as per the systems and allows you to set your own rules."

"Geneos automatically sends email notifications when any batch job fails, the database is down or the website is down. It is automatically monitoring everything and reduces manual effort."

"I would say that it is an easy-to-use monitoring tool. Amongst the available monitoring tools, it is a really good option."

"For getting out in front of a problem before it happens, it's absolutely superb."

"This solution has helped provide relief to existing Level 2 teams, allowing them to focus efforts on in-depth problem analysis."

"One of the most valuable features is that it can be configured by non-developers. It doesn't require development expertise to configure it."

More ITRS Geneos pros

"You should really try Nagios; it will help a lot and I have found that it is the best buddy for system admins."

"Nagios monitors our servers, so we know if anything goes wrong and can solve the problem before it happens."

"The good thing about Nagios Core is it covers everything."

"We have used this product now for quite some time and we are happy with it."

"The application performance monitoring feature is valuable, and we primarily use it for user experience monitoring and determining which layer the problem happened to resolve it."

"Dashboard provides monitor of total assets."

"Alert calls occur anytime a service goes down or a matrix is difficult and that helps us to quickly restore service and transfer work."

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

More Nagios Core pros

Cons

"There is a part of the rules for monitoring alerts. I want to understand more about how to choose the samples and the requirements for the rules. That is the part that I want to understand better and get better training for."

"The Geneos configuration has greatly improved since the nascent version 1.0 days, but still requires specialist knowledge and convoluted config debugging when something’s not monitoring as expected."

"Not a ten because when the Gateway was very overloaded it was very hard to monitor the alerts, especially for the product services."

"Currently, it is difficult to monitor secure websites using SSL or with SSO enabled."

"There is are issues with the compatibility of plugins with AIX servers."

"Their cloud monitoring solution needs to be improved. I have already given them the feedback that it's not capable of meeting the latest technology needs."

"One area where there is room for improvement is the log file. I would like to be able to do a pre-run on the log files."

"I would really like to see something from the Geneos side to set up automated reporting from ITRS. We have to send reporting to management every day. To do that we have to check the dashboard and then we have to report whether everything is fine or not. In the future, I want something, some reporting kind of feature in ITRS, where it can collect all the data and mention what is green, what is amber, what is red in a report."

More ITRS Geneos cons

"Setup is bit complicated due to the large set of libraries it needs, but this may be because it's open source."

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

"The core version is no match for the XI version."

"Nagios' great customizability is also one of its greatest drawback."

"The initial setup process could be easier."

"The scalability needs improvement, it's not scalable at this time."

"The core version is no match for the XI version."

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

More Nagios Core cons

Pricing and Cost Advice

"You will get the best price if you get a single global deal."

"The organization is not just purchasing a license for the product, but also managing services and professional services from ITRS. Another factor is if the implementation is going to be in production, non-production, or both."

"The pricing seems reasonable. We're happy enough with it."

"The product is priced quite high. There are pricing options for customers based on the size of the environment and plug-ins used by the monitoring system."

"The licensing cost may seem expensive upfront. However, the service is outstanding, the tool does things that no other tools can do, and the customizability more than makes up for the cost of licensing."

"Given our spend and the amount of service we have in it, the pricing is quite reasonable."

"Based on feedback from colleagues and friends working in the financial sector, Geneos is relatively costly. Many companies have been switching from Geneos to Dynatrace, Sysdig, or other monitoring tools in the past two years because of the price."

"Pricing is the touchy subject, even here. Upper management always wants us to find a cheaper solution. But we have so much integrated with ITRS... It's expensive, but it does its job very well. And you set it and go."

More ITRS Geneos pricing and cost advice

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

"Most the plugin features are free."

"The Nagios Core (PNP4Nagios + Core) is free and can be setup by Netadmin within a few hours. The only additional cost is the cloud server."

"Lessening the price point would be an improvement."

"We are using the free version of Nagios Core."

"The solution is expensive."

"We are using the free version."

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

More Nagios Core pricing and cost advice

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Top Industries

By visitors reading reviews

Financial Services Firm

67%

Computer Software Company

Construction Company

Outsourcing Company

Manufacturing Company

10%

Comms Service Provider

Computer Software Company

Financial Services Firm

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	6
Midsize Enterprise	12
Large Enterprise	39

By reviewers
Company Size	Count
Small Business	20
Midsize Enterprise	11
Large Enterprise	23

Questions from the Community

What is your experience regarding pricing and costs for ITRS Geneos?

The pricing is high. Licensing fees might be around 500$ per server monthly.

See all answers

What needs improvement with ITRS Geneos?

ITRS Geneos is a legacy system. It predicts or provides proactive measures once an issue is resolved. It doesn't offer any predictive capabilities or root cause analysis. They throw a lot of data i...

See all answers

What is your primary use case for ITRS Geneos?

ITRS offers multiple products, including upgrades for synthetic monitoring and a SaaS platform. Geneos is used for infrastructure monitoring, covering KPIs such as CPU, memory, processes, network l...

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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...

See all answers

Comparisons

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Compared 5% of the time

Nagios XI vs ITRS Geneos

Compared 5% of the time

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Compared 4% of the time

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Compared 5% of the time

Centreon vs Nagios Core

Compared 5% of the time

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Product Reports

Buyer's Guide

ITRS Geneos

March 2026

Download ITRS Geneos product report

Buyer's Guide

Nagios Core

March 2026

Download Nagios Core product report

Also Known As

Geneos

No data available

Overview

ITRS Geneos is a real-time monitoring tool designed for managing increasingly complex, hybrid and interconnected IT estates.

Built with financial services and trading organisations in mind, it collects a wide range of data relating to server performance, infrastructure, trading, connectivity and applications, and analyses it to provide relevant information and alerts in real time.

Geneos can give full stack visibility across highly dynamic environments and presents all the information through a single pane of glass and its configurable and customisable dashboards provide end-to-end visibility to both technical and business users.

For more information, please visit https://www.itrsgroup.com/products/geneos

ITRS

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

Nagios

Sample Customers

ITRS Geneos is used by over 170 financial institutions, including JPMorgan, HSBC, RBS, Deutsche Bank and Goldman Sachs. Clients range from investment banks to exchanges and brokers.

Airbnb, Cisco, PayPal, FanDuel

Buyer's Guide

ITRS Geneos vs. Nagios Core

April 2026

Free Report: ITRS Geneos vs. Nagios Core

Find out what your peers are saying about ITRS Geneos vs. Nagios Core and other solutions. Updated: April 2026.

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