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

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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

"The solution is used across the entire investment banking division, covering environments such as electronic trading, algo-trading, fixed income, FX, etc. It monitors that environment and enables a bank to significantly reduce down time. Although hard to measure, since implementation, we have probably seen some increased stability because of it and we have definitely seen teams a lot more aware of their environment. Consequently, we can be more proactive in challenging and improving previously undetected weaknesses."

"It's a very good tool to use and everybody is very happy with it."

"Tons of default modules which are available out of the box"

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

"As a company looking to onboard, its capacity to monitor just about anything from Unix log files and processes to database memory, and even run queries and provide results, means it can be used as a one stop shop for all your monitoring needs if you understand how to utilise it to its fullest extent."

"ITRS Active Console has helped us monitor servers and set thresholds for different metrics, is easy to setup, works with different kinds of servers, and also helps you execute shell scripts as a response to alerts."

"The Netprobe is so lightweight compared to the agents that most monitoring tools use. It's really superior to the competition. The agent that is used by almost every competitive tool takes a lot more system resources. It's slower and it requires a greater effort and more compromises in terms of security to install on the monitored servers. With Geneos, because it lives outside the code, it is far easier and far less taxing on the monitored systems."

"Real-time monitoring of market data components on an enterprise environment is the most valuable feature of Active Console and Gateway."

More ITRS Geneos pros

"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."

"Using Nagios, I'm managing more than 1000 services, which involves the following operating nodes: IBM AIX, Red Hat Enterprise Linux, HP-Unix, Windows enterprise-grade OS, Cisco router/switches, FortiGate and WatchGuard firewalls, APC UPS systems, and many more."

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

"We use the product to monitor server applications."

"Nagios Core is a great solution for monitoring pretty much any size of deployment but you do need to know your way around a Linux system to set it up and run it."

"The poller is really good, I can easily implement new stuff and it is scalable."

"Nagios Core is a great tool for monitoring the infrastructure including MSM queues, and when we use the agent, we can add other things as well."

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

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 ITA, the post-incident analytics, could be improved."

"At the moment Geneos is excellent and handling real time monitoring, however not great at doing historical reporting."

"The dashboard feature is full of bugs. Grouping items results in a distorted dashboard."

"ITRS Geneos is not on the cloud at a time when everyone is moving to the cloud."

"Data visualization – real time and historical – is a weakness."

"Geneos' application monitoring could be improved a lot. Products like AppDynamics and Dynatrace provide the process thread-level monitoring, but Geneos lacks these capabilities."

"Sometimes, if there is a lot of data coming onto the servers, we have observed a little bit of slowness on the gateway servers which are doing the ITRS dashboard monitoring."

More ITRS Geneos cons

"Nagios Core is not easy to use, so I don't recommend it for everyone."

"The configuration and reporting modules need to be improved."

"Making it a little easier to configure and set up from the start would help. There are multiple layers that you have to wade through to be able to set it up, to do it the right way, and to get it to do what you want it to do."

"It would be nice if it was hosted in cloud. Also, they need to improve the graphs."

"I believe Nagios Core will need to provide an option for big data platforms in the future."

"Don't use it. If you're starting from scratch, there are products that scale better and perform better, and they use the same plugin syntax as they were initially Nagios forks."

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

"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

"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."

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

"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."

"Pricing and licensing is based on the requirements."

"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 pricing is fairly market-related. They have been very lenient because we have been working with them for so long. An example is that we're currently migrating some of our services to AWS, and they've given us a grace period for some of the things to help with the migration and not to grow additional costs while we are migrating, but it's still on par with the market."

"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."

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

More ITRS Geneos pricing and cost advice

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

"I would rate the solution's pricing an eight out of ten."

"It's free."

"Lessening the price point would be an improvement."

"It's free."

"Most the plugin features are free."

"The solution is expensive."

"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."

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

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Compared 5% of the time

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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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