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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
7.0
Gremlin's platform improved ROI by reducing costs and downtime, streamlining error identification, and enhancing availability with efficient Chaos Engineering.
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
8.0
Gremlin's customer support is highly rated for responsiveness and resources, with most users giving scores of eight to ten.
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 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
7.8
Gremlin's platform ensures seamless scalability and efficient workload management, enhancing DevOps across diverse cloud environments with safety mechanisms.
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
Gremlin Reliability Management Platform's workload management capability is good, effectively managing large workloads seamlessly while providing safety mechanisms and governance around chaos engineering.
Documentation Engineer at a tech vendor with 1,001-5,000 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 solution is scalable.
Senior System Administrator at Interactive Group
 

Stability Issues

Sentiment score
9.3
Gremlin Reliability Management Platform is praised for its stability and reliability, consistently delivering downtime-free and dependable performance.
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

Gremlin could improve through AI-driven analysis, better user onboarding, expanded service integrations, enhanced UI, and additional learning resources.
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) 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
 

Setup Cost

Enterprise users value Gremlin's platform for reliability and risk management, justifying costs despite visibility challenges in dashboards.
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) 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
 

Valuable Features

Gremlin enhances efficiency with test suites, fault injection, risk detection, and reliability insights, boosting uptime and customer satisfaction.
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) 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
Gremlin Reliability Management Platform has positively impacted our organization by making outages less frequent and improving recovery time significantly, resulting in fewer complaints on the customer success side and overall optimization of our DevOps process.
Documentation Engineer at a tech vendor with 1,001-5,000 employees
You can monitor anything.
Senior System Administrator at Interactive Group
 

Categories and Ranking

Gremlin Reliability Managem...
Ranking in IT Infrastructure Monitoring
23rd
Average Rating
8.6
Reviews Sentiment
7.0
Number of Reviews
8
Ranking in other categories
Application Performance Monitoring (APM) and Observability (27th), DevSecOps (10th)
Nagios Core
Ranking in IT Infrastructure Monitoring
16th
Average Rating
8.2
Reviews Sentiment
7.3
Number of Reviews
51
Ranking in other categories
Network Monitoring Software (19th)
 

Mindshare comparison

As of August 2026, in the IT Infrastructure Monitoring category, the mindshare of Gremlin Reliability Management Platform is 0.2%. The mindshare of Nagios Core is 1.6%, down from 3.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
IT Infrastructure Monitoring Mindshare Distribution
ProductMindshare (%)
Nagios Core1.6%
Gremlin Reliability Management Platform0.2%
Other98.2%
IT Infrastructure Monitoring
 

Featured Reviews

Ravi Konduru - PeerSpot reviewer
VP Global at a tech vendor with 10,001+ employees
Proactive failure testing has increased confidence and reliability across complex microservices
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 identification works well seamlessly, deeper dependency intelligence is lacking. When you have deeper dependencies, reliability management can struggle with identifying those deeper dependency intelligences. Having the intelligence to deeply analyze dependencies will be very helpful. Regarding reliability scores, while those scores are good, having more actionable reliability scores is something I would recommend adding to the existing system. Initially, when I started with Gremlin Reliability Management Platform certification programs, I completed two certifications with Gremlin—one professional and another practitioner. While that certification has helped me, an easier onboarding and learning curve for bringing people into this program can be adjusted. That is one current gap I see. If you really look at the cost-benefit visibility, it is not very evident by using Gremlin Reliability Management Platform. If Gremlin Reliability Management Platform could help realize that and bring in visibility regarding the cost versus the benefit, that is the reason I provide a score less than ten. From a standpoint of simulating complex real-world failures, I believe there is still a gap concerning gap identification. Currently, Gremlin Reliability Management Platform mainly focuses on infrastructure-level failures and does not really simulate business logic failures, data corruption scenarios, or potential failures across regions. One of the key elements needing improvement with Gremlin Reliability Management Platform is the limited team workflow integration I see in my organization. Collaboration and limited team workflow integration are areas I would highlight as needing improvement.
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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909,725 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Construction Company
12%
Printing Company
9%
Comms Service Provider
8%
Sports Company
7%
Comms Service Provider
10%
Manufacturing Company
9%
Financial Services Firm
8%
Construction Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business3
Large Enterprise7
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise11
Large Enterprise24
 

Questions from the Community

What needs improvement with Gremlin Reliability Management Platform?
While I have no complaints about Gremlin Reliability Management Platform, I believe the UI can be improved to enhance the developer experience for security engineers and DevOps engineers. Additiona...
What is your primary use case for Gremlin Reliability Management Platform?
My main use case for Gremlin Reliability Management Platform is to see how our applications behave under extreme stress and how resilient our application is when a simulation of server crash alongs...
What advice do you have for others considering Gremlin Reliability Management Platform?
For others considering Gremlin Reliability Management Platform, it is an excellent tool for organizations facing downtime issues, as it allows for chaos testing without needing to check logs and me...
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: August 2026.
909,725 professionals have used our research since 2012.