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Gremlin Reliability Management Platform vs Nagios XI 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
6.7
Gremlin Platform cut testing staff, reduced errors, improved uptime, and increased efficiency with 30% fewer production issues.
Sentiment score
6.6
Nagios XI enhances efficiency and time management but concerns about increased costs affect ROI perception across organizations.
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
8.4
Gremlin's customer support is highly praised for responsiveness, effective solutions, and valuable subscription models, enhancing overall customer satisfaction.
Sentiment score
6.5
Nagios XI support is mixed; praised for responsiveness but criticized for high cost, complex licensing, and delayed responses.
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 expert partnership model is a significant strength I can suggest for Gremlin Reliability Management Platform.
VP Global at a tech vendor with 10,001+ 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
7.7
Gremlin's platform scales well on AWS and GCP, smoothly supporting chaos experiments and larger teams with positive user experiences.
Sentiment score
7.1
Nagios XI is scalable for small to medium environments but faces challenges in large infrastructures and cloud adaptability.
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) at a non-tech company with self employed
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
If the user interface isn’t presenting data well, it becomes difficult to manage when scaling.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
 

Stability Issues

Sentiment score
9.2
The Gremlin Reliability Management Platform is praised for its stability and reliability, with users highlighting its dependable performance.
Sentiment score
7.3
Nagios XI is stable, but large deployments may experience performance issues, database problems, and minor network dependencies.
I have not seen any downtime or issues with its behavior or performance.
Senior Software Engineer at a sports company with 10,001+ employees
It is very stable.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
 

Room For Improvement

The Gremlin Reliability Platform requires AI enhancements, better integration, user-friendly features, and more educational resources to improve usability and value.
Nagios XI's interface is outdated, lacks scalability, needs better cloud integration, APIs, automation, and improved documentation.
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) at a non-tech company with self employed
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
The user interface is great, the integration is smooth, and Gremlin Reliability Management Platform has a fantastic support team that helps us a lot in many cases.
DevOps & Mlops Engineer at a printing company with 1-10 employees
Many tools have poor user interfaces, making them hard to manage and navigate.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
The GUI could be improved. It's a bit too basic.
Site Duty Manager at Assw
 

Setup Cost

Enterprise buyers find Gremlin costly yet valuable for large-scale systems, though pricing and dashboard clarity vary by company.
Nagios XI provides cost-efficient enterprise-level monitoring with reasonable pricing, appreciated for its features and open-source options.
It is not so cheap, but it has very powerful features.
Dev Ops To Development (IT) at a non-tech company with self employed
From a pricing standpoint of view regarding Gremlin Reliability Management Platform, I would say it is a bit expensive, but that expense is worth it given the kind of benefits it offers.
VP Global at a tech vendor with 10,001+ employees
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
We are using the free, open-source version.
Site Duty Manager at Assw
The pricing for the Nagios XI product is good and better than other solutions.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
 

Valuable Features

Gremlin's platform improves reliability with automated tests, failure simulations, risk detection, flexibility, and measurable infrastructure resilience.
Nagios XI provides customizable, flexible, and scalable IT infrastructure monitoring with real-time alerts and extensive plugin support.
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) at a non-tech company with self employed
We fix failures even before they occur, which is basically proactive risk detection and risk mitigation.
VP Global at a tech vendor with 10,001+ employees
The best feature that Gremlin Reliability Management Platform offers for me is the prebuilt reliability test; I think that is the best feature along with the automated scheduling.
DEVOPS specialist at a media company with 10,001+ employees
Nagios XI simplifies our setup and reduces the time spent configuring monitoring tools.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
The alerting system is very effective.
Site Duty Manager at Assw
 

Categories and Ranking

Gremlin Reliability Managem...
Ranking in IT Infrastructure Monitoring
25th
Average Rating
8.8
Reviews Sentiment
7.0
Number of Reviews
7
Ranking in other categories
Application Performance Monitoring (APM) and Observability (23rd), DevSecOps (7th)
Nagios XI
Ranking in IT Infrastructure Monitoring
17th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
58
Ranking in other categories
Network Monitoring Software (16th), Server Monitoring (9th), Cloud Monitoring Software (20th)
 

Mindshare comparison

As of May 2026, in the IT Infrastructure Monitoring category, the mindshare of Gremlin Reliability Management Platform is 0.2%. The mindshare of Nagios XI is 3.5%, 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 XI3.5%
Gremlin Reliability Management Platform0.2%
Other96.3%
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.
Emmanuel Appiah Boateng - PeerSpot reviewer
Network and Security Engineer at a educational organization with 1,001-5,000 employees
Simplifies setup and requires user interface enhancement
Nagios XI is easy to install, which sets it apart from other open-source solutions I've tried. Typically, setting up a monitoring system on Linux involves cloning files from GitHub, building it, and installing many dependencies, but with Nagios XI, it wasn't like that. Nagios XI simplifies our setup and reduces the time spent configuring monitoring tools.
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Comparison Review

it_user174738 - PeerSpot reviewer
IT Developer at a tech services company with 51-200 employees
May 31, 2015
Nagios vs. Zabbix vs. PRTG vs. Spiceworks vs. Solarwinds Network Performance Monitor
I have researched a quite a few network monitoring tools which can be used for various monitoring purposes of not only the servers, but the intermediate routers as well. There are majorly three types of these softwares. Ones which are completely open-source, you can do almost anything you want…
 

Top Industries

By visitors reading reviews
Printing Company
11%
Construction Company
11%
Financial Services Firm
10%
Sports Company
10%
Financial Services Firm
10%
Computer Software Company
8%
Comms Service Provider
7%
Manufacturing Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business3
Large Enterprise6
By reviewers
Company SizeCount
Small Business22
Midsize Enterprise17
Large Enterprise21
 

Questions from the Community

What needs improvement with Gremlin Reliability Management Platform?
There are certain areas where I think Gremlin Reliability Management Platform can improve. I would certainly add features related to AI and GenAI for recommendations. While dependency identificatio...
What is your primary use case for Gremlin Reliability Management Platform?
The primary reason I am using Gremlin Reliability Management Platform is to proactively test failures, identify weaknesses in my system, and fix them before real incidents actually occur. From a pr...
What advice do you have for others considering Gremlin Reliability Management Platform?
I would certainly suggest others venture into Gremlin Reliability Management Platform, as there is no second thought about it. However, I would not recommend jumping straight into production chaos....
What is your experience regarding pricing and costs for Nagios XI?
The pricing for the Nagios XI product is good and better than other solutions. I would give it a four or five.
What needs improvement with Nagios XI?
The user interface needs improvement. Many tools have poor user interfaces, making them hard to manage and navigate.
What is your primary use case for Nagios XI?
I normally use Nagios XI for our servers. It's not particularly used for network equipment, however, I use it for monitoring our server performance, including CPU, memory, data, and services runnin...
 

Comparisons

No data available
 

Overview

 

Sample Customers

Information Not Available
Nagios has over one million users globally, including AOL, DHL, McAfee, MCI, MTV, Yahoo!, Universal, Toshiba, Sony, Siemens, and JPMorgan Chase.
Find out what your peers are saying about Gremlin Reliability Management Platform vs. Nagios XI and other solutions. Updated: April 2026.
894,738 professionals have used our research since 2012.