Gremlin Reliability Management Platform vs OP5 Monitor comparison

Gremlin and ITRS are both solutions in the IT Infrastructure Monitoring category. Gremlin is ranked #25 with an average rating of 8.7, while ITRS is ranked #42 with an average rating of 9.0. Gremlin holds a 0.2% mindshare in IM, compared to ITRS’s 0.7% mindshare. Additionally, 85% of Gremlin users are willing to recommend the solution, compared to 100% of ITRS users who would recommend it.

Gremlin Reliability Managem...

Read 7 Gremlin Reliability Management Platform reviews

1,165 Views
350 Comparison Views

85% willing to recommend

OP5 Monitor

Read 7 OP5 Monitor reviews

2,454 Views
1,620 Comparison Views

100% willing to recommend

Gremlin Reliability Managem...

OP5 Monitor

Comparison Buyer's Guide

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Executive Summary

We performed a comparison between Gremlin Reliability Management Platform and OP5 Monitor based on real PeerSpot user reviews.

Find out in this report how the two IT Infrastructure Monitoring solutions compare in terms of features, pricing, service and support, easy of deployment, and ROI.

To learn more, read our detailed Gremlin Reliability Management Platform vs. OP5 Monitor Report (Updated: April 2026).

Buyer's Guide

Gremlin Reliability Management Platform vs. OP5 Monitor

April 2026

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Helped 894,738 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

Gremlin Reliability Managem...

Ranking in IT Infrastructure Monitoring

25th

Average Rating

8.8

Reviews Sentiment

7.0

Number of Reviews

Ranking in other categories

Application Performance Monitoring (APM) and Observability (23rd), DevSecOps (7th)

OP5 Monitor

Ranking in IT Infrastructure Monitoring

42nd

Average Rating

8.6

Reviews Sentiment

4.4

Number of Reviews

Ranking in other categories

Network Monitoring Software (39th)

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 OP5 Monitor is 0.7%, down from 0.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.

IT Infrastructure Monitoring Mindshare Distribution
Product	Mindshare (%)
Gremlin Reliability Management Platform	0.2%
OP5 Monitor	0.7%
Other	99.1%

IT Infrastructure Monitoring

Featured Reviews

Varun Lellapalli

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.

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Sumanth Arshanapally

Senior Analyst at a tech vendor with 10,001+ employees

Monitoring ease and cost-saving benefits enhance operational efficiency

The monitoring in OP5 Monitor is very easy because we can directly use custom plugins. We can write custom scripts and use those scripts directly. It's very low cost, open, and the dashboards are easy to see. We can extract the reports easily, and this is very easy to compare. Real-time monitoring in OP5 Monitor provides data every one minute or every five minutes, enabling us to get live data from the last one minute or last five minutes. OP5 Monitor gave us proper server availability, so we can always check whether a server goes down or the server CPU and memory decreases. Before reaching a particular bottleneck situation, we identified and fixed the issue, which helped us from a cost-saving business perspective. It helped us avoid application downtime.

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Quotes from Members

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

Pros

"Since using Gremlin Reliability Management Platform, we were able to reduce the incidents by six percent after conducting our limited experiments, and we were also able to increase the uptime from ninety-eight to ninety-nine, which represents a one percent increase in uptime."

"Using Gremlin Reliability Management Platform has raised more than fifty percent of the reliability of the infrastructure."

"The Enterprise Reliability Platform has positively impacted my organization as it has significantly increased the efficiency and reliability of our systems."

"Gremlin Reliability Management Platform is amazing with the reliability score, providing built-in Chaos Engineering experiments that you run on your service to receive a reliability score along with insights on the issues and risks present in your service that you can examine and work on."

"More than anything, we fix failures even before they occur, which is basically proactive risk detection and risk mitigation."

"Gremlin Reliability Management Platform has impacted my organization positively as it helped a lot and reduced our failures, allowing us to find critical pinpoints in our application that had existed for three to ten months and led to too many improvements, reduced downtime, and a smoother experience for our application on AWS."

"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."

"OP5 Monitor is a great choice due to its being built on an open-source monitoring tool and provides ample opportunity for customization based on specific support requirements. It is also user-friendly and easy to manage with a wide range of plugins available for use. In comparison to other enterprise tools, such as Micro Focus, OP5 Monitor stands out for its features and cost-effectiveness, making it the best tool in the market. Customization is one of the key strengths of the tool and provides a lot of capabilities. Additionally, it is easy to find support and plugins for the tool through online resources."

"The monitoring in OP5 Monitor is very easy because we can directly use custom plugins; we can write custom scripts and use those scripts directly, it's very low cost, open, and the dashboards are easy to see."

"The best feature is that it is very relatable, stable, and scalable."

"The API makes it pretty easy to integrate with any system."

"It monitors and continuously tests everything that is of importance to you and your users. It could be everything from monitoring disk space to CPU usage to memory. It could include determining if the response time in your e-commerce platform is quick enough, or whether you have too many bounces from some of the pages on your website. You want to monitor anything that could cost you money or time or resources. You can do that with this system. It's very flexible."

"With limited hardware or a virtual machine, you can address a huge network, hundreds of thousands of elements that need to be monitored. Other commercial software is not on that level."

"We can also observe whatever we want, and there are no limitations."

"Instead of checking the logs each Monday, or checking that applications are running, and checking your ticketing system for angry users, you put this system in place and it monitors and continuously tests everything that is of importance to you and your users."

More OP5 Monitor pros

Cons

"Gremlin Reliability Management Platform can be improved as the pricing is a bit expensive and the learning curve for beginners is a bit difficult."

"I think that it will be important to have resources to perform self-directed studies on Gremlin Reliability Management Platform as an improvement."

"If you really look at the cost-benefit visibility, it is not very evident by using Gremlin Reliability Management Platform."

"I think Gremlin Reliability Management Platform can be improved by integrating with more AWS services or GCP services."

"The user interface is not what we are used to these days, and should be improved."

"OP5 Monitor could include application monitoring in addition to infrastructure monitoring. If application business transactions were monitored, it would be helpful."

"We do not get performance reports properly."

"The solution is useful for tweaking. However, there have been some negative experiences, such as limited report capabilities. The only report available is in PDF format, making it difficult for teams managing multiple servers to extract data in Excel format. The speaker recommends that the team improve the report capabilities to better serve users."

"They need to improve the dashboard interface."

"OP5 lacks some visualization, a feature that makes some other products nice. Op5 is built for purpose, which is fine, but if you compare it with some new products, the visualization is not so appealing, especially for management... If you don't need fancy visualizations, OP5 is fine."

"They need to improve the dashboard interface."

"IT environments today are in constant flux. This is driven by the newer cloud technologies such as Kubernetes and Docker, etc. The whole Nagios-based monitoring system that OP5 is created on top of, is based on a host-service model. There is a need for a strategy on what to do with more dynamic environments. There is some cool stuff going on in that direction."

More OP5 Monitor cons

Pricing and Cost Advice

Information not available

"The cost of the license and support are separate. If you want platinum call support, it will cost more than a regular call. I did not opt for it, as it is an additional cost."

"OP5 has a very low price as a solution, compared to many other solutions out there."

"It was not expensive. And because it's less demanding in terms of hardware, you don't have to pay for another SQL or other database license, and you can have a huge installation on one machine..."

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Top Industries

By visitors reading reviews

Printing Company

11%

Construction Company

11%

Financial Services Firm

10%

Sports Company

10%

Manufacturing Company

12%

Financial Services Firm

12%

Government

11%

Healthcare Company

10%

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	3
Large Enterprise	6

By reviewers
Company Size	Count
Small Business	2
Large Enterprise	5

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...

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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...

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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....

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What is your experience regarding pricing and costs for OP5 Monitor?

The price for OP5 Monitor is fine, but we don't know the exact price because it was managed by us; the customer themselves bought it and gave it to us to monitor.

See all answers

What needs improvement with OP5 Monitor?

OP5 Monitor could include application monitoring in addition to infrastructure monitoring. If application business transactions were monitored, it would be helpful. For application-related issues, ...

See all answers

What is your primary use case for OP5 Monitor?

Our previous use case for OP5 Monitor was server monitoring.

See all answers

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Product Reports

Buyer's Guide

Gremlin Reliability Management Platform

May 2026

Gremlin Reliability Management Platform report

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Buyer's Guide

OP5 Monitor

April 2026

Download OP5 Monitor product report

Overview

Gremlin Reliability Management Platform empowers organizations to proactively identify and mitigate potential failures. It enhances system resilience through controlled chaos engineering, aiding tech teams in delivering reliable services.

Designed for tech-savvy users, Gremlin enables teams to implement chaos engineering effectively to ensure system reliability. It offers precise control over variables, allowing teams to simulate real-world scenarios and fortify system operations. Gremlin plays a strategic role in preventing downtime and maintaining optimal service delivery through a suite of advanced tools tailored for IT infrastructure.

What are the most important features of Gremlin?

Attack Library: Offers diverse failure scenarios for comprehensive testing.
Security Control: Ensures safe execution of tests with access restrictions.
Detailed Reporting: Provides insights into system weaknesses and improvements.
API Access: Facilitates automation and integration with existing systems.

What benefits should users look for in reviews?

Increased Uptime: Improved system availability through proactive testing.
Cost Efficiency: Reduced need for corrective measures post-failure.
Team Collaboration: Enhances coordination among IT and operations teams.
Product Reliability: More robust and reliable service delivery to clients.

In industries such as e-commerce, finance, and healthcare, Gremlin helps maintain service reliability by identifying vulnerabilities before they affect operations. IT teams can simulate stress tests specific to their industry, ensuring systems are resilient against potential threats, enhancing customer satisfaction, and securing business continuity.

Gremlin

OP5 Monitor delivers real-time IT infrastructure monitoring with extensive customization options through open-source plugins. Its intuitive interface and cost-effectiveness make it a preferred choice for efficient performance monitoring and task automation.

OP5 Monitor integrates seamlessly with systems, offering customizable dashboards and efficient performance tracking for networks, servers, applications, databases, and cloud environments. It supports LDAP and local user accounts, providing timely insights to prevent downtime. The documentation enhances integration ease, though its user interface could benefit from updates. Improved APIs, better report capabilities, and enhanced platform integration are needed. Effective in healthcare, maritime, and diverse sectors, it provides global deployments with tailored monitoring solutions.

What are the key features of OP5 Monitor?

Real-Time Monitoring: Tracks performance and alerts users immediately on anomalies.
Seamless Integration: Works effectively with existing systems and infrastructure.
Extensive Customization: Offers open-source plugins for personalized configurations.

What benefits or ROI should users consider in reviews for OP5 Monitor?

Cost-Effectiveness: Provides robust features at a competitive price.
User-Friendly Interface: Simplifies monitoring processes for administrators.
Efficiency in Performance Monitoring: Automates tasks and optimizes resource use.

In industries like healthcare, maritime, and others, OP5 Monitor automates tracking and alerts, easing manual checks to enhance quality. Its global deployments provide tailored monitoring for CPU, memory, and disk space, efficiently managing both on-premise and cloud environments for large-scale operations.

ITRS

Sample Customers

Information Not Available

Svenska Spel, Carus, VGL, Tele2, Viking Line, Clas Ohlson, Vanderlande, Försäkringskassan

Buyer's Guide

Gremlin Reliability Management Platform vs. OP5 Monitor

April 2026

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