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Microsoft Defender XDR vs Stellar Cyber Open XDR 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 XDR
Ranking in Endpoint Detection and Response (EDR)
7th
Ranking in Extended Detection and Response (XDR)
4th
Average Rating
8.4
Reviews Sentiment
7.1
Number of Reviews
106
Ranking in other categories
Microsoft Security Suite (5th)
Stellar Cyber Open XDR
Ranking in Endpoint Detection and Response (EDR)
57th
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) (47th), User Entity Behavior Analytics (UEBA) (25th), Network Traffic Analysis (NTA) (18th), Security Orchestration Automation and Response (SOAR) (24th), Network Detection and Response (NDR) (20th), Identity Threat Detection and Response (ITDR) (19th)
 

Mindshare comparison

As of February 2026, in the Extended Detection and Response (XDR) category, the mindshare of Microsoft Defender XDR is 4.8%, down from 6.8% compared to the previous year. The mindshare of Stellar Cyber Open XDR is 2.1%, up from 1.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Extended Detection and Response (XDR) Market Share Distribution
ProductMarket Share (%)
Microsoft Defender XDR4.8%
Stellar Cyber Open XDR2.1%
Other93.1%
Extended Detection and Response (XDR)
 

Featured Reviews

KO
House security operator at Cypress Creek Renewables
Advanced threat hunting saves significant time in tracking and responding to incidents
Microsoft Defender XDR could be improved with a lower price. My main suggestion would essentially be what Copilot is providing, which is a single pane of glass, so I don't have to go to different windows. That's just a workflow consideration for me. It would be great to have all the information centralized into one particular data app. If I need to open up extra ones, I can, however, I would appreciate a future where everything I need is right there on one single pane of glass. Beyond that, there's really nothing else I see that I would want Microsoft to improve.
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

"From the perspective of Microsoft 365 XDR, the main benefit is a single, centralized dashboard offering the holistic visibility organizations crave."
"The summarization of emails is a valuable feature."
"Setting up Microsoft 365 Defender is easy. It's a user-friendly solution that provides threat protection. It has good stability and scalability."
"The integration between all the Defender products is the most valuable feature."
"The product integrates security into one tool instead of having third-party security tools."
"The feature of Microsoft Defender XDR that I preferred the most traditionally was its focus on endpoint protection, but now identity is right up there with endpoint security. Identity is important because different compromises start at the identity level. This allows us to understand what actions are being taken, who is doing them, and whether it is actually them."
"The solution is well integrated with applications. It is easy to maintain and administer."
"Defender XDR enables you to scan a system remotely and get a complete inventory of its assets. You can gather more information from the asset inventory and apply threat intelligence using Office 365 or something."
"It can integrate with almost any cybersecurity tool available in the market."
"Stellar Cyber Open XDR offers these functionalities at a more affordable price, making it easier for me to position it with price-sensitive customers."
 

Cons

"The solution can improve the rules and privileges it offers."
"Since all of our databases are updated and located in the cloud, I would like additional support for this."
"365 Defender has multiple subsets, including Defender for Cloud Apps. When integrating Defender for Cloud Apps with apps on third-party cloud platforms like AWS or GCP, there are limitations on our ability to control user activities. If Microsoft added more control over third-party products, that would be a game-changer and help us quite a lot."
"Generally, antivirus products provide a central control to manage every device in terms of who is installing it or who is trying to disable it, but Microsoft doesn't have such a control center for the antivirus product it provides."
"Microsoft Defender is slow to adapt to evolving threats."
"What could be improved in Microsoft 365 Defender is its licensing, e.g. it should be more consolidated and would be good if it has some optimizations. Improving the alerts and notifications, in terms of adding more details, would also be good for this solution."
"Offboarding latency should be reduced. Even after a device has been successfully offboarded using a particular offboarding script, it still shows up as onboarded."
"Some of our older hardware experienced a slight bump in CPU and memory usage. Although I don't have empirical data to back that up, I would suggest possibly more streamlining in the software."
"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

"Understanding the subscription model has been a bit challenging, as every feature or requirement comes with an additional cost."
"For Defender, they have Endpoint Plan 1 and Endpoint Plan 2, but I don't know on what basis they have classified Endpoint Plan 1 and Plan 2, but it has given me enough pain to pick and design Endpoint Plan 1 or Endpoint Plan 2 for my organization. In fact, we are still struggling with it. Too many SKUs are confusing. There should not be too many SKUs, and they shouldn't charge for every new feature."
"I would like to have more security features in the lower licenses because not every customer is able to buy E5 licenses. The bundling isn't always easy for our customers to understand. Compared to other tools, it's a good price."
"Microsoft 365 Defender offers competitive pricing."
"It can be complex to navigate since customers have varying licensing agreements across Microsoft. If they go straightforward with E5 for all users, it's simple, but combinations based on budget constraints can complicate things."
"It is fairly priced because we get complete integrated services with the E5 license."
"On average, we pay around 55 euros per user for the services and features we receive."
"Microsoft purposely makes its license combinations complex and includes combinations like Microsoft 365 E3 and Microsoft 365 E5, Office 365 E3, Office 365 E5, and Office 365 E1, so you get confused. Microsoft tries to sell you a bundle of a lot of things together."
"It’s a single license platform."
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Top Industries

By visitors reading reviews
Computer Software Company
12%
Financial Services Firm
9%
Manufacturing Company
8%
Comms Service Provider
7%
Manufacturing Company
13%
Computer Software Company
10%
Comms Service Provider
9%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business47
Midsize Enterprise25
Large Enterprise38
No data available
 

Questions from the Community

What do you like most about Microsoft 365 Defender?
Microsoft Defender XDR provides strong identity protection with comprehensive insights into risky user behavior and potential indicators of compromise.
What is your experience regarding pricing and costs for Microsoft 365 Defender?
My experience with pricing, setup, costs, and licensing of Microsoft Defender XDR is tied to our E5 subscription, which is very straightforward for us. We also purchase the uplift for our mobile us...
What needs improvement with Microsoft 365 Defender?
I am not aware of a mobile app that would be available for my team. With a single analyst, if she is ever away, it would be beneficial to have easier access. While she can use the web portal, the e...
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 functionalities at a significantly lower cost than rival products, enabling me to...
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 improvement as of now. Their support is good, and the team is small, enabling them to ca...
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, especially for customers with large and medium networks. It eliminates the need for a d...
 

Also Known As

Microsoft 365 Defender, Microsoft Threat Protection, MS 365 Defender
No data available
 

Overview

 

Sample Customers

Accenture, Deloitte, ExxonMobil, General Electric, IBM, Johnson & Johnson and many others.
Sumitomo Chemical USA, PlastiPak Packaging, University of Denver, Large California State Agency, Large Midwestern American City
Find out what your peers are saying about Microsoft Defender XDR vs. Stellar Cyber Open XDR and other solutions. Updated: February 2026.
882,207 professionals have used our research since 2012.