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Gremlin Reliability Management Platform vs Nagios Core comparison

 

Comparison Buyer's Guide

Executive Summary

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
8.1
Gremlin Platform users see ROI from 30% fewer issues, reduced testing staff, and less stressful, predictable weekends.
Sentiment score
8.9
Nagios Core boosted operational efficiency, reduced costs, minimized downtime, and significantly improved productivity and disaster recovery times.
We are seeing a return on investment from using Gremlin Reliability Management Platform because we are getting less production issues by thirty percent, as I mentioned earlier, making it a great investment.
DEVOPS specialist at a media company with 10,001+ employees
We do not need to look at all the day's metrics on Grafana dashboards; we run our chaos experiments in a production environment to see how reliable our product or service is.
DevOps & Mlops Engineer at a printing company with 1-10 employees
If we needed ten people to do tests once upon a time, now, using Gremlin Reliability Management Platform, we can do it with a fifty percent reduction in employees.
Senior Software Engineer at a sports company with 10,001+ employees
 

Customer Service

Sentiment score
8.5
Gremlin offers reliable customer service with effective Zoom support, good documentation, and high user ratings for prompt assistance.
Sentiment score
5.5
Nagios Core relies on community and documentation for support, offering valuable resources but facing scalability and consistency challenges.
When I have questions or run into issues with Gremlin Reliability Management Platform, their support team is helpful and responsive.
DevOps & Mlops Engineer at a printing company with 1-10 employees
The customer support for Gremlin Reliability Management Platform is good overall.
DEVOPS specialist at a media company with 10,001+ employees
 

Scalability Issues

Sentiment score
7.9
Gremlin Reliability Management Platform excels in scalability and adaptability, seamlessly supporting chaos experiments across diverse infrastructures like AWS.
Sentiment score
7.6
Nagios Core is highly scalable, supporting diverse infrastructures with open-source flexibility, despite some horizontal scaling concerns.
Gremlin Reliability Management Platform scales smoothly for running more chaos experiments, adding more services, or supporting a larger team.
DevOps & Mlops Engineer at a printing company with 1-10 employees
More than scalability, I thought about availability because it is a really important thing of the architecture tools.
Dev Ops To Development (IT)
The scalability of Gremlin Reliability Management Platform depends on the scalability of the underlying infrastructure that we are hosting it on.
Senior Software Engineer at a sports company with 10,001+ employees
The solution is scalable.
Senior System Administrator at Interactive Group
 

Stability Issues

Sentiment score
9.2
Gremlin Reliability Management Platform is praised for its high stability, consistent performance, and dependable availability without downtime.
Sentiment score
8.6
Nagios Core is highly stable and reliable, offering exceptional performance on Linux with minimal plugin-related issues.
I have not seen any downtime or issues with its behavior or performance.
Senior Software Engineer at a sports company with 10,001+ employees
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
 

Room For Improvement

Enhancing Gremlin with AWS, GCP, machine learning integration and resources can improve usability, despite high cost and complexity.
Nagios Core needs a modernized interface, simplified configuration, scalability, and integration with tools like Grafana for improved usability.
I think it would be useful to have some integration with Splunk or other log collectors, or maybe in the future, the ability to link Dynatrace or any other observability platform.
Dev Ops To Development (IT)
The infrastructure also needs to be very mature; it should be set up properly and that takes a lot of compliance and regulation time.
Senior Software Engineer at a sports company with 10,001+ employees
If we can integrate it with natural language, could we talk to Gremlin Reliability Management Platform and have it configure some of the basic settings so that non-technical persons can also work on Gremlin Reliability Management Platform-like tools?
DEVOPS specialist at a media company with 10,001+ employees
 

Setup Cost

Nagios Core provides cost-effective, open-source monitoring with engineering setup and maintenance, requiring customization expertise for full benefits.
It is not so cheap, but it has very powerful features.
Dev Ops To Development (IT)
My role does not incur costs for us since we have an NFR for Gremlin Reliability Management Platform that we can use in our case.
DevOps & Mlops Engineer at a printing company with 1-10 employees
 

Valuable Features

Gremlin Reliability Management Platform enhances system performance with prebuilt tests, automated scheduling, and a user-friendly dashboard for improved uptime.
Nagios Core offers extensible plugins, alerting, customizable dashboards, proactive monitoring, and integration, enhancing system reliability and minimizing downtime.
There are really two pathways along: fewer incidents because with Gremlin Reliability Management Platform, we can make every part of the infrastructure more solid, and less downtime because we can test more architectures and then things like how to put in high availability clusters.
Dev Ops To Development (IT)
One of my best features of Gremlin Reliability Management Platform is the built-in chaos experiments, which gives you the reliability score of your service.
DevOps & Mlops Engineer at a printing company with 1-10 employees
Gremlin Reliability Management Platform has positively impacted my organization because before Gremlin Reliability Management Platform, we did not even know how to conduct these chaos engineering tests.
Senior Software Engineer at a sports company with 10,001+ employees
It has a very handy dashboard, providing live alerts and visibility for everything.
Senior System Administrator at Interactive Group
 

Categories and Ranking

Gremlin Reliability Managem...
Ranking in IT Infrastructure Monitoring
53rd
Average Rating
8.4
Reviews Sentiment
7.5
Number of Reviews
5
Ranking in other categories
Application Performance Monitoring (APM) and Observability (54th), DevSecOps (15th)
Nagios Core
Ranking in IT Infrastructure Monitoring
10th
Average Rating
8.2
Reviews Sentiment
7.3
Number of Reviews
51
Ranking in other categories
Network Monitoring Software (10th)
 

Mindshare comparison

As of March 2026, in the IT Infrastructure Monitoring category, the mindshare of Gremlin Reliability Management Platform is 0.1%. The mindshare of Nagios Core is 2.2%, down from 3.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
IT Infrastructure Monitoring Mindshare Distribution
ProductMindshare (%)
Nagios Core2.2%
Gremlin Reliability Management Platform0.1%
Other97.7%
IT Infrastructure Monitoring
 

Featured Reviews

VL
Senior Software Engineer at a sports company with 10,001+ employees
Chaos experiments have revealed weak points and now provide controlled cost-saving tests
The best features of Gremlin Reliability Management Platform are the safe failure injection, which is crucial as we can simulate the failures in a manner that we know these are just dumping tests and not the actual issues. Whether it is the CPU spike or the memory exhaustion, or the network latency, or the server shutdown, server shutdown is one of the most favorite features that I have in Gremlin Reliability Management Platform. The controlled blast radius is another standout feature. The controlled blast radius feature has helped my team in that we actually wanted to target only one specific container, our Docker containers that we deployed. It helped us to conduct tests in a very specific, isolated manner instead of launching a larger test or focusing on hundreds of servers at a time, resulting in very limited impact. Since ours is a very small team, we do not want to impact other servers. This controlled blast radius helped us to only focus on our servers and not impact any other team. Gremlin Reliability Management Platform has positively impacted my organization because before Gremlin Reliability Management Platform, we did not even know how to conduct these chaos engineering tests. We heard about it, but we had no idea of how to do something of that nature. If there are ten servers, ten systems in our architecture and if suddenly something goes down, nobody knew what would happen next. We did not even know how to simulate these types of tests. This lack of confidence has been mitigated by using Gremlin Reliability Management Platform. Now we can confidently test and see which system is the most critical. If this goes down, what happens? How much business valuation are we going to impact? How much loss are we going to incur? All of this is now clearly visible and transparent. Since using Gremlin Reliability Management Platform, we were able to reduce the incidents by six percent after conducting our limited experiments. We were also able to increase the uptime from ninety-eight to ninety-nine, which represents a one percent increase in uptime.
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.
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Top Industries

By visitors reading reviews
Sports Company
12%
Printing Company
12%
Construction Company
9%
Media Company
6%
Manufacturing Company
10%
Comms Service Provider
10%
Computer Software Company
9%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise11
Large Enterprise23
 

Questions from the Community

What needs improvement with Gremlin Reliability Management Platform?
I think that it will be important to have resources to perform self-directed studies on Gremlin Reliability Management Platform as an improvement. There is a small and fast and simple certification...
What is your primary use case for Gremlin Reliability Management Platform?
My main use case for Gremlin Reliability Management Platform is chaos testing. I take my infrastructure and then I sabotage some things to see how they reach the goal. I try network or infrastructu...
What advice do you have for others considering Gremlin Reliability Management Platform?
The main advice I would give to others looking into using Gremlin Reliability Management Platform would be to study it. Do not be shy to fail. Test everything and do lab architectures to test. It i...
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...
 

Comparisons

No data available
 

Overview

 

Sample Customers

Information Not Available
Airbnb, Cisco, PayPal, FanDuel
Find out what your peers are saying about Gremlin Reliability Management Platform vs. Nagios Core and other solutions. Updated: March 2026.
885,311 professionals have used our research since 2012.