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ReliaQuest GreyMatter vs Stellar Cyber Open XDR comparison

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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:
 

Categories and Ranking

Cortex XDR by Palo Alto Net...
Sponsored
Ranking in Extended Detection and Response (XDR)
3rd
Average Rating
8.6
Reviews Sentiment
6.7
Number of Reviews
121
Ranking in other categories
Endpoint Protection Platform (EPP) (4th), Endpoint Detection and Response (EDR) (5th), Ransomware Protection (2nd), AI-Powered Cybersecurity Platforms (1st)
ReliaQuest GreyMatter
Ranking in Extended Detection and Response (XDR)
30th
Average Rating
9.0
Reviews Sentiment
8.3
Number of Reviews
3
Ranking in other categories
Digital Risk Protection (11th), Managed Detection and Response (MDR) (16th)
Stellar Cyber Open XDR
Ranking in Extended Detection and Response (XDR)
36th
Average Rating
0.0
Reviews Sentiment
7.0
Number of Reviews
2
Ranking in other categories
Security Information and Event Management (SIEM) (43rd), User Entity Behavior Analytics (UEBA) (29th), Endpoint Detection and Response (EDR) (55th), Network Traffic Analysis (NTA) (17th), Security Orchestration Automation and Response (SOAR) (23rd), Network Detection and Response (NDR) (21st), Identity Threat Detection and Response (ITDR) (24th)
 

Mindshare comparison

As of October 2026, in the Extended Detection and Response (XDR) category, the mindshare of Cortex XDR by Palo Alto Networks is 4.8%, down from 6.0% compared to the previous year. The mindshare of ReliaQuest GreyMatter is 0.9%, up from 0.6% compared to the previous year. The mindshare of Stellar Cyber Open XDR is 2.3%, down from 2.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Extended Detection and Response (XDR) Mindshare Distribution
ProductMindshare (%)
Cortex XDR by Palo Alto Networks4.8%
ReliaQuest GreyMatter0.9%
Stellar Cyber Open XDR2.3%
Other92.0%
Extended Detection and Response (XDR)
 

Featured Reviews

ABHISHEK_SINGH - PeerSpot reviewer
Senior Process Expert at A.P. Moller - Maersk
Gained full visibility and streamlined threat detection through behavior-based insights and AI integration
Initially, we got to have a lot of false positives when we onboarded, but nowadays it's quite smooth. We have fine-tuned our security policies and allowed different levels of policies to get rid of those false positives. Currently, we are getting a fairly good amount of incidents that are not false positives or benign, but actionable items. The process is streamlined. In the initial days, the operations used to get involved in a lot of benign and other activities, but now the process is streamlined. We are leveraging the auto-detection and remediation plans. The operations teams are now more involved in other business roles as well, not just looking into the logs and fetching out what's happening there. They have fixed a lot of things. Initially, they didn't have IAC code drift detection, cloud posture management, or security posture management, but they have those now. They purchased different vendors and did a merger with that. They have now Prisma Cloud that gets integrated and now they are working with Cortex Cloud. Everything that was negative has now been addressed, and the product altogether looks to be in a very better and mature shape now. Currently, it's more or less detecting the workloads with AI-based best practices. Since most organizations are consuming AI agents and other things, we are looking forward to seeing what other feature enhancements Palo Alto can support in that.
Michael Weidner - PeerSpot reviewer
Information Security Analyst at Byline Bank
Automation has reduced manual investigations and improves our incident response efficiency
ReliaQuest GreyMatter offers automated incident response, threat detection and investigation, integration with security tools, threat hunting, and AI-powered automation as some of its best features. Automated incident response stands out for me because it helps us execute response playbooks to contain threats quickly. AI-powered automation makes my job easier as it helps reduce repetitive manual tasks and speed up investigations. My favorite feature is the automated incident response because it helps me save time, reduce manual effort, and enables my team members and me to respond to security threats more efficiently. ReliaQuest GreyMatter provides strong security through controlled access, security monitoring, and automated threat detection. The AI capabilities help us analyze and investigate threats more efficiently. ReliaQuest GreyMatter integrates very seamlessly with other AWS services I use, and I value the integrations because they help improve threat visibility.
JC
Global Director, Commercial Operations at Promasecure LLC
Automated security monitoring increases efficiency, but market visibility needs improvement
I am currently evaluating Stellar Cyber Open XDR in terms of their support. I do not see any major areas for improvement as of now. Their support is good, and the team is small, enabling them to cater to everyone effectively. While I have not encountered significant drawbacks so far, market penetration is challenging due to the product's newness, despite its flexibility and customization features. I find their user interface to be quite good.

Quotes from Members

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

Pros

"It'll not slow down your system when compared to others."
"The solution allows us to gain remote access without the user's knowledge and take the necessary actions on the device."
"Once you become familiar with it, Cortex XDR by Palo Alto Networks is a more powerful tool and I would say that I prefer it over MDE because it is a stronger tool for me."
"Based on my experience with Cortex XDR by Palo Alto Networks, I highly recommend it due to its quick response to zero-day attacks and low utilization from end-user devices."
"The anti-exploit is impenetrable."
"Stability is a primary factor, and then there's the ease of distribution and policy management; Cortex XDR by Palo Alto Networks is very easy to work with, and we're quite happy with them."
"The protection offered by this product is good, as is the endpoint reporting."
"Previously, we had to install endpoint protection per machine and then scan and update, but Cortex XDR basically does that centrally and predictably, so we have more time to do day-to-day work rather than spend time chasing those endpoints."
"Automated incident response stands out for me because it helps us execute response playbooks to contain threats quickly."
"ReliaQuest GreyMatter saves around 60% of time or resources."
"ReliaQuest GreyMatter has helped us to reduce security incidents by 89%, which is a significant amount of incidents we have seen."
"Stellar Cyber Open XDR offers these functionalities at a more affordable price, making it easier for me to position it with price-sensitive customers."
"It can integrate with almost any cybersecurity tool available in the market."
 

Cons

"I think Cortex XDR by Palo Alto Networks could be improved by having tiered pricing by device, especially since we have not covered mobile devices because the cost is very high."
"Cortex XDR by Palo Alto Networks is a strong tool, but it is true that digesting information sometimes makes the tool go a little bit slower."
"It'll help if customization was easier."
"Product might have some bugs."
"It's more focused on network communication. If a customer wants to increase the level of protection and start working with documents, it's impossible to integrate these features into the system. It's more of a communication-oriented system than a content security-oriented system."
"It automatically detects security issues. It should be able to protect our network devices while operating autonomously."
"The playbooks could be improved to include more functionalities or actions."
"I would rate it an 8 rather than a 10 mainly because there is still room to improve the user experience around complex investigations, including alert tuning and third-party integration."
"Areas that have room for improvement include user interface and integration."
"ReliaQuest GreyMatter could be improved by adding more integrations with third-party security tools, providing more customizable dashboards and reports, and simplifying configuration."
"I would rate the stability at about five to six. The platform requires some fine-tuning, especially when integrating data sources and creating connectors."
"Support is an issue because they have a limited number of resources."
 

Pricing and Cost Advice

"I did PoCs on products called Cylance and CrowdStrike. Although, I consider these products and they were also good, when it come to cost and budgetary factors, Traps has been proven to be better than the other two products. It is quite cost-effective and delivers all the entire solution which we require."
"The price is on the higher side, but it's okay."
"The solution is expensive. It's pricing is on a yearly-basis."
"This is an expensive solution."
"This is an expensive solution."
"Compared to CrowdStrike, Cortex XDR is an expensive solution."
"Our customers have expressed that the price is high."
"I feel it is fairly priced."
Information not available
"It’s a single license platform."
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919,088 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Comms Service Provider
13%
Outsourcing Company
12%
Construction Company
10%
Manufacturing Company
10%
Financial Services Firm
10%
Manufacturing Company
9%
Construction Company
8%
Retailer
6%
Manufacturing Company
14%
Outsourcing Company
10%
Comms Service Provider
10%
Construction Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business49
Midsize Enterprise21
Large Enterprise56
No data available
No data available
 

Questions from the Community

Cortex XDR by Palo Alto vs. Sentinel One
Cortex XDR by Palo Alto vs. SentinelOne SentinelOne offers very detailed specifics with regard to risks or attacks. ...
Comparing CrowdStrike Falcon to Cortex XDR (Palo Alto)
Cortex XDR by Palo Alto vs. CrowdStrike Falcon Both Cortex XDR and Crowd Strike Falcon offer cloud-based solutions th...
How is Cortex XDR compared with Microsoft Defender?
Microsoft Defender for Endpoint is a cloud-delivered endpoint security solution. The tool reduces the attack surface,...
What needs improvement with ReliaQuest GreyMatter?
Areas that have room for improvement include user interface and integration.
What is your primary use case for ReliaQuest GreyMatter?
I use ReliaQuest GreyMatter for detection and response, XDR, and SIEM. The best features I like about GreyMatter the ...
What is your experience regarding pricing and costs for Stellar Cyber Open XDR?
Pricing is a major benefit of Stellar Cyber Open XDR. I rate it between three and four on the cost scale. It offers f...
What needs improvement with Stellar Cyber Open XDR?
I am currently evaluating Stellar Cyber Open XDR in terms of their support. I do not see any major areas for improvem...
What is your primary use case for Stellar Cyber Open XDR?
I use Stellar Cyber Open XDR ( /products/stellar-cyber-open-xdr-reviews ) as a 24/7 security monitoring tool, especia...
 

Also Known As

Cyvera, Cortex XDR, Palo Alto Networks Traps
No data available
No data available
 

Overview

 

Sample Customers

CBI Health Group, University Honda, VakifBank
Information Not Available
Sumitomo Chemical USA, PlastiPak Packaging, University of Denver, Large California State Agency, Large Midwestern American City
Find out what your peers are saying about ReliaQuest GreyMatter vs. Stellar Cyber Open XDR and other solutions. Updated: October 2026.
919,088 professionals have used our research since 2012.