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Microsoft Defender Experts for Hunting vs ReliaQuest GreyMatter 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:
 

Categories and Ranking

Microsoft Defender Experts ...
Ranking in Managed Detection and Response (MDR)
19th
Average Rating
9.0
Reviews Sentiment
6.3
Number of Reviews
5
Ranking in other categories
No ranking in other categories
ReliaQuest GreyMatter
Ranking in Managed Detection and Response (MDR)
17th
Average Rating
9.6
Reviews Sentiment
8.1
Number of Reviews
2
Ranking in other categories
Digital Risk Protection (11th), Extended Detection and Response (XDR) (25th)
 

Mindshare comparison

As of August 2026, in the Managed Detection and Response (MDR) category, the mindshare of Microsoft Defender Experts for Hunting is 1.4%, down from 1.6% compared to the previous year. The mindshare of ReliaQuest GreyMatter is 1.5%, down from 1.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Managed Detection and Response (MDR) Mindshare Distribution
ProductMindshare (%)
ReliaQuest GreyMatter1.5%
Microsoft Defender Experts for Hunting1.4%
Other97.1%
Managed Detection and Response (MDR)
 

Featured Reviews

Mondher-Smii - PeerSpot reviewer
Cybersecurity Manager at Insomea
Has supported clients in managing incidents through clear pricing and hybrid deployment options
What really stands out about Microsoft Defender Experts for Hunting is that it's easy to use. The cost is clear, and the pricing is transparent. The onboarding of the product on the customer's environment is straightforward. We can use it in a hybrid environment, in the cloud, or on-premise environment. This is the main advantage regarding this product. If it's configured correctly, everything will be good, resilient, and secure, which supports threat mitigation efforts depending on the configuration on the tenant and the parameters on Microsoft Defender Experts for Hunting. Threat intelligence updates have some impact on our overall security posture. They give us external eyes regarding threat actors, which is good. It's very helpful to enrich the SIEM, which is Microsoft Sentinel. It's a good feature that we can include threat intel on the product.
MK
Senior Security Analyst at Tata Consultancy
Unified security monitoring has reduced alert fatigue and improves proactive threat hunting
I use real-time monitoring in ReliaQuest GreyMatter, which significantly improves my security posture. The unified interface helps reduce alert fatigue. I would estimate it saves around 20% in alert fatigue reduction. The automated threat hunting capabilities in ReliaQuest GreyMatter help me stay ahead of threats. The machine learning algorithm benefits my threat intelligence by providing deeper insights and predictions. I use various metrics to rate the success of the predictive threat intelligence in ReliaQuest GreyMatter.

Quotes from Members

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

Pros

"Microsoft Defender Experts for Hunting helps my customers detect or prevent emerging threats that are not yet published but Microsoft has visibility into."
"The solution helps to detect some suspicious items for us and our clients."
"What really stands out about Microsoft Defender Experts for Hunting is that it's easy to use, the cost is clear, and the pricing is transparent, with straightforward onboarding in hybrid, cloud, or on-premise environments."
"Easy to use is what my customers say is the biggest benefit of Microsoft Defender Experts for Hunting for them."
"The best feature of this solution is that it is an integrated and comprehensive solution for the entire Microsoft ecosystem."
"ReliaQuest GreyMatter has helped us to reduce security incidents by 89%, which is a significant amount of incidents we have seen."
"ReliaQuest GreyMatter saves around 60% of time or resources."
 

Cons

"As a partner, Microsoft Defender Experts for Hunting could be improved by getting earlier threat detection signals so we could proactively research on our own end and help support a campaign to raise awareness as well as proactive response."
"There is a lot of change in a small period. This might not be helpful for IT administrators and users."
"We tried the proactive threat hunting feature, but it was not a good experience with Microsoft Defender Experts for Hunting. It created more trouble than expected with false positives and non-expected answers."
"The price of the solution is costly, which I find significant."
"The solution’s user interface could be improved."
"Areas that have room for improvement include user interface and integration."
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909,725 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
22%
Financial Services Firm
11%
Comms Service Provider
7%
Manufacturing Company
6%
Financial Services Firm
10%
Manufacturing Company
10%
Construction Company
8%
Retailer
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
No data available
 

Questions from the Community

What needs improvement with Microsoft Defender Experts for Hunting?
As a partner, Microsoft Defender Experts for Hunting could be improved by getting earlier threat detection signals so we could proactively research on our own end and help support a campaign to rai...
What is your primary use case for Microsoft Defender Experts for Hunting?
As a working security partner, my main use case for Microsoft Defender Experts for Hunting is that many of our customers also have Microsoft Defender Experts for Hunting and really find a lot of va...
What advice do you have for others considering Microsoft Defender Experts for Hunting?
As a partner, there can be some concern that Microsoft Defender Experts for Hunting is taking away some of our business because they're providing a solution that we also provide. However, the team ...
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 most are its efficiency and user experience.
 

Overview

Find out what your peers are saying about Microsoft Defender Experts for Hunting vs. ReliaQuest GreyMatter and other solutions. Updated: August 2026.
909,725 professionals have used our research since 2012.