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Microsoft Defender for Office 365 vs SentinelOne Singularity Identity comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Dec 1, 2024

Review summaries and opinions

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

ROI

Sentiment score
6.9
Microsoft Defender for Office 365 offers strong ROI through security enhancements, cost savings, and improved company productivity despite measurement challenges.
Sentiment score
6.8
SentinelOne Singularity Identity offers enhanced protection and value, saving users over 200 hours annually in security investigations.
It has also decreased our time to detection and response by about 15 to 20 percent.
Technology support manager at Alfred State College
Overall, cost of owning and operating our system goes down.
Designation Chief Consultant at Avtow
It's hard to quantify the return on investment we've seen from Microsoft Defender for Office 365.
Chief Architect at a tech vendor with 1,001-5,000 employees
 

Customer Service

Sentiment score
5.8
Microsoft Defender for Office 365 users rate support highly, praising its responsiveness and 24/7 availability, despite occasional documentation and communication issues.
Sentiment score
7.3
SentinelOne Singularity Identity is lauded for comprehensive, responsive support, offering rapid issue resolution and dedicated customer success resources.
Over the past two years, there have been no critical problems.
Solution Consultant at BIM Group of Companies
we opened tickets, and they typically resolve them quickly.
Chief Architect at a tech vendor with 1,001-5,000 employees
With a subscription for Microsoft Defender for Office 365, it is an eight. Without it, it is a six.
Manager at a tech services company with 10,001+ employees
They have been responsive to our needs as integrators and those of the client.
Senior Consultant at CGI
 

Scalability Issues

Sentiment score
7.8
Microsoft Defender for Office 365 offers scalable, efficient protection for large enterprises, ensuring seamless growth across diverse industries.
Sentiment score
7.9
SentinelOne Singularity Identity is scalable and flexible but faces challenges with deployment maturity and third-party integration scalability.
We have never faced scalability problems, and Microsoft manages it effectively.
Solution Consultant at BIM Group of Companies
Microsoft Defender for Office 365 scales transparently for us, as we grew from 1,000 users to 3,000 users, and we didn't notice much difference.
Chief Architect at a tech vendor with 1,001-5,000 employees
Microsoft Defender for Office 365 scales with the growing needs of my company well.
Senior Client Director and Advisory Service Leader at Crossfuze
 

Stability Issues

Sentiment score
7.7
Microsoft Defender for Office 365 provides 99.9% uptime with minor issues, ensuring reliable performance and seamless cloud integration.
Sentiment score
8.1
SentinelOne Singularity Identity is highly stable with minimal disruptions, responsive support, and low CPU resource usage.
I would rate the stability of Microsoft Defender for Office 365 as 10 over 10 because it's highly available, it works, and it does the job it is meant to do.
Cloud Solutions Architect at a tech services company with 201-500 employees
I have not experienced any downtime, crashes, or performance issues because of Defender.
Technology Associate at a financial services firm with 51-200 employees
The solution is stable, as we have been using it for the past two years.
Solution Consultant at BIM Group of Companies
 

Room For Improvement

Users call for enhanced virus detection, cross-platform support, and pricing transparency in Microsoft Defender for Office 365.
SentinelOne Singularity Identity needs improved policies, interfaces, support, and features like reporting, updates, and integration for better usability.
The main area for improvement is simplifying the implementation and rollout process.
Infrastructure and Security Lead at Vedanta
Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published.
Solution Consultant at BIM Group of Companies
There is a different console for different things; I just want one consolidated console.
Senior Director, Security Architecture & Engineering at a leisure / travel company with 10,001+ employees
There is a clear roadmap for improvements, including enhancing capabilities with AI and seamless functionality in an MSP model for deeper visibility across multiple agencies.
Senior Consultant at CGI
 

Setup Cost

Microsoft Defender for Office 365 pricing is seen as flexible but potentially expensive, offering value in comprehensive security features.
SentinelOne Singularity Identity offers flexible pricing seen as both cost-effective and sometimes expensive, reflecting its comprehensive features.
We've likely saved 30% of costs.
Designation Chief Consultant at Avtow
Money-wise, it is a part of the Office 365 suite, making it slightly more expensive compared to Trend Micro.
Infrastructure and Security Lead at Vedanta
Microsoft is quite affordable with a lot of features available for any size organization.
Solution Consultant at BIM Group of Companies
 

Valuable Features

Microsoft Defender for Office 365 enhances email security with anti-phishing, anti-malware, threat intelligence, and seamless integration for efficient management.
SentinelOne Singularity Identity offers AI-driven security with dynamic threat detection, seamless management, and enhanced visibility for rapid remediation.
It ranks the threats and allows us to prioritize those hitting us the hardest, such as email threats.
Technology support manager at Alfred State College
It provides end-to-end visibility on email threats such as phishing, extending beyond Exchange Online Protection.
Solution Consultant at BIM Group of Companies
The value of the DLP feature is significant to us because we have internal data, sometimes sensitive, and the users may not always be aware of security and privacy, which might lead them to send out information mistakenly to external parties.
Chief Architect at a tech vendor with 1,001-5,000 employees
With visibility into endpoint telemetry, SentinelOne does provide useful information to find threat actors and empowers those who are in the business of threat hunting.
Senior Consultant at CGI
 

Categories and Ranking

Microsoft Defender for Offi...
Ranking in Advanced Threat Protection (ATP)
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
60
Ranking in other categories
Email Archiving (1st), Email Security (1st), Microsoft Security Suite (10th), Secure Email Gateway (SEG) (1st)
SentinelOne Singularity Ide...
Ranking in Advanced Threat Protection (ATP)
15th
Average Rating
9.0
Reviews Sentiment
7.3
Number of Reviews
22
Ranking in other categories
Vulnerability Management (21st), Threat Deception Platforms (3rd), Identity Threat Detection and Response (ITDR) (5th)
 

Mindshare comparison

As of January 2026, in the Advanced Threat Protection (ATP) category, the mindshare of Microsoft Defender for Office 365 is 9.7%, down from 16.8% compared to the previous year. The mindshare of SentinelOne Singularity Identity is 1.9%, up from 1.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Advanced Threat Protection (ATP) Market Share Distribution
ProductMarket Share (%)
Microsoft Defender for Office 3659.7%
SentinelOne Singularity Identity1.9%
Other88.4%
Advanced Threat Protection (ATP)
 

Featured Reviews

Emeka Ndulu - PeerSpot reviewer
Cloud Solutions Architect at a tech services company with 201-500 employees
Improves threat visibility and response while reducing manual tasks and training users against phishing
I appreciate the attack simulation feature whereby I get to train users and educate them on how to identify phishing emails and spam emails, as well as the anti-spam protection. It gives me visibility into my threat environment and threat landscape to ensure that I am one step ahead of any likelihood of threats within my environment. I get to detect it and respond, so the threat intelligence is very effective. Microsoft security solutions save my time. It saves money because once I protect my environment, I don't lose money. It has decreased my detection time and my time to respond.
Roftiel Constantine - PeerSpot reviewer
Global Chief Information Security Officer at Barry-Wehmiller
Provides proactive threat remediation, reduces alert volume, and enhances incident response capabilities
During our pre-purchase evaluation of SentinelOne's EDR capabilities three years ago, we were consistently impressed by the positive relationships customers reported having with SentinelOne's engineers, sales teams, and customer success managers. These strong relationships, evident in the customers' unsolicited feedback, highlighted the "soft skills" and intangible qualities that SentinelOne possessed. This positive customer experience has been mirrored in our own interactions with them. Their responsiveness to our needs, particularly when addressing a couple of challenges we faced, has been excellent. They proactively scheduled weekly meetings to demonstrate their commitment to resolving our issues, a customer-centric approach I admire. SentinelOne's dedication to customer service, including their rapid technology updates and responsiveness to our suggestions, has been crucial to our success in protecting our organization. Their ability to quickly incorporate our needs into new releases is truly impressive and sets them apart. Overall, I highly recommend SentinelOne based on our positive interactions across all levels of their organization.
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Top Industries

By visitors reading reviews
Computer Software Company
14%
Financial Services Firm
8%
Manufacturing Company
8%
Comms Service Provider
6%
Computer Software Company
11%
Manufacturing Company
8%
Financial Services Firm
7%
Performing Arts
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business23
Midsize Enterprise10
Large Enterprise31
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise5
Large Enterprise13
 

Questions from the Community

What needs improvement with Microsoft Defender for Office 365?
The inbuilt analysis of false positives can be faster. It's not slow, but it can be faster.
What is your primary use case for Microsoft Defender for Office 365?
My use case for Microsoft Defender for Office 365 is for email protection, safe links, protection of links, documents, protecting my documents, and protecting attachments. I also use it to conduct ...
What is your experience regarding pricing and costs for SentinelOne Singularity Identity?
I have no visibility into pricing, setup costs, or licensing as the government handles these aspects directly with SentinelOne. We do the integrating, and they process the payments.
What needs improvement with SentinelOne Singularity Identity?
Regarding improvements, I believe that API integration in third-party applications could be better. The Singularity tool uses its own credential in the record features.
What is your primary use case for SentinelOne Singularity Identity?
One of the main use cases I describe is that we face lateral movement in our customer's server side. The customer is using 50 or more servers for the news channel, Daily Thanthi. Among those, one s...
 

Also Known As

MS Defender for Office 365
No data available
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Information Not Available
Find out what your peers are saying about Microsoft Defender for Office 365 vs. SentinelOne Singularity Identity and other solutions. Updated: December 2025.
881,082 professionals have used our research since 2012.