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Microsoft Defender Experts for Hunting vs ReliaQuest GreyMatter 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

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)
16th
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) (30th)
 

Mindshare comparison

As of October 2026, in the Managed Detection and Response (MDR) category, the mindshare of Microsoft Defender Experts for Hunting is 1.3%, down from 1.6% compared to the previous year. The mindshare of ReliaQuest GreyMatter is 1.4%, down from 1.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Managed Detection and Response (MDR) Mindshare Distribution
ProductMindshare (%)
ReliaQuest GreyMatter1.4%
Microsoft Defender Experts for Hunting1.3%
Other97.3%
Managed Detection and Response (MDR)
 

Featured Reviews

Joe Cicero - PeerSpot reviewer
Chief Marketing Officer at a computer software company with 201-500 employees
Proactive threat hunting has strengthened our defenses and provides expert support for incidents
Proactive threat hunting as well as the Ask an Expert feature, which is a button inside of the XDR portal that becomes available when the customer owns Microsoft Defender Experts for Hunting, are the best features it offers. If a customer or one of our analysts needs extra support or has a question about a Microsoft Defender Experts for Hunting notification, they can click on that button and chat directly with a Microsoft security analyst to get more information or fill in any gaps regarding the Ask an Expert feature. Improved detection rates are one of the specific outcomes that show the positive impact because Microsoft Defender Experts for Hunting is a second set of eyes or a second team looking for emerging threats within a shared customer's environment. For us, the proactive approach that Microsoft Defender Experts for Hunting is always running is valuable, and we see those alerts pop up inside of our incident queues in Microsoft Sentinel and we respond and acknowledge them. In many cases, Microsoft might see an alert from a zero-day that we aren't even aware of yet or the industry isn't aware of yet and we see that tagged within our incident queue, which allows us to follow up with it much sooner than had we had to search and detect for it ourselves. Microsoft Defender Experts for Hunting helps my customers detect or prevent emerging threats that are not yet published but Microsoft has visibility into. Microsoft Defender Experts for Hunting's reporting and analytics are clear and actionable, and the fact that it's tied to the MITRE framework puts it all in a common language. Microsoft Defender Experts for Hunting helps my customers comply with industry regulations or standards, though I am unsure how, but many have requirements for threat hunting and this checks that box. Microsoft Defender Experts for Hunting helps my team respond to incidents by providing a backstop, which does speed up the process and improve outcomes.
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."
"Easy to use is what my customers say is the biggest benefit of Microsoft Defender Experts for Hunting for them."
"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."
"The best feature of this solution is that it is an integrated and comprehensive solution for the entire Microsoft ecosystem."
"The solution helps to detect some suspicious items for us and our clients."
"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

"There is a lot of change in a small period. This might not be helpful for IT administrators and users."
"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."
"The price of the solution is costly, which I find significant."
"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 solution’s user interface could be improved."
"Areas that have room for improvement include user interface and integration."
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Top Industries

By visitors reading reviews
Computer Software Company
21%
Financial Services Firm
11%
Comms Service Provider
7%
Construction Company
6%
Financial Services Firm
10%
Manufacturing Company
9%
Construction Company
8%
Retailer
6%
 

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: September 2026.
915,341 professionals have used our research since 2012.