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Microsoft Defender for Office 365 vs Varonis Platform comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Mar 15, 2026

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
7.1
Microsoft Defender for Office 365 boosts efficiency, cuts phishing, integrates security, reduces tool costs, and mitigates risk.
Sentiment score
5.5
Varonis Platform offers significant ROI by reducing manual efforts, enhancing compliance, and improving security operations for organizations.
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
Varonis Platform has definitely reduced the risk of data breaches at many client sites and has definitely lowered manual effort; manual effort has decreased by seventy percent due to automating data classification and permission reviews.
Global Leadership Council at a tech company with 10,001+ employees
I definitely say that we have had time savings by using the DataVantage module and also time savings using the AD module when we are dealing with different incidents.
cybersecurity architect at a healthcare company with 5,001-10,000 employees
I have seen a return on investment mainly through time savings and improved security for sensitive data, making it a valuable investment.
Technical Consultant at Satcom Infotech Pvt Ltd
 

Customer Service

Sentiment score
5.7
Microsoft Defender for Office 365 support is reliable but varies with subscription level and complexity of issues.
Sentiment score
7.0
Varonis Platform offers highly rated customer service with responsive technical support, though some users report occasional delays.
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
The customer support is above par; it is what I think other organizations should look at to be comparable to.
cybersecurity architect at a healthcare company with 5,001-10,000 employees
They respond quickly to anything we need, which is not common among platforms.
Database and crm dynamics engineer at a financial services firm with 201-500 employees
I would rate the customer support for Varonis Platform at nine out of ten.
Technical Consultant at Satcom Infotech Pvt Ltd
 

Scalability Issues

Sentiment score
7.8
Microsoft Defender for Office 365 efficiently scales with cloud-native design, ensuring reliable performance and seamless integration for diverse organizations.
Sentiment score
6.2
Varonis Platform offers scalable SaaS deployment, efficiently managing data growth for large enterprises, supporting hybrid setups and extensive data.
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
Varonis Platform is highly rated for scalability.
Technical Consultant at Satcom Infotech Pvt Ltd
Varonis Platform is highly scalable and designed to support large enterprise environments, which could have millions of files, thousands of users, and multiple data types.
Global Leadership Council at a tech company with 10,001+ employees
Varonis's scalability as eight to eight point five out of ten.
Cyber Security Senior Engineer at a manufacturing company with 10,001+ employees
 

Stability Issues

Sentiment score
7.8
Microsoft Defender for Office 365 offers consistently reliable performance with minimal downtime, high user ratings, and manageable minor issues.
Sentiment score
7.2
Varonis Platform is stable and reliable for enterprises, despite occasional performance issues with new plugins and large data sets.
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
It is a mature product with a long track record, widely adopted, and very reliable.
Global Leadership Council at a tech company with 10,001+ employees
 

Room For Improvement

Microsoft Defender for Office 365 needs improvements in usability, false positive reduction, phishing detection, scalability, and reporting capabilities.
Varonis Platform needs interface improvements, simplified licensing, faster large dataset handling, cloud integration, better updates, troubleshooting, and pricing.
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
Varonis requires more access permissions for its core functions compared to competitors, which can be a concern for companies about data safety.
Cyber Security Senior Engineer at a manufacturing company with 10,001+ employees
A phishing email module would be great; I look forward to when that comes out.
cybersecurity architect at a healthcare company with 5,001-10,000 employees
Enhancing tighter integration with third-party solutions, such as SIEM or SOAR platforms, for smoother incident response workflows.
Technical Consultant at Satcom Infotech Pvt Ltd
 

Setup Cost

Microsoft Defender for Office 365 is cost-effective with E5, costly standalone, requiring careful planning for subscription-based licensing.
Varonis Platform pricing is high, ideal for large enterprises, with separate module licenses and options for purchase or subscription.
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
Varonis is known for its high licensing cost, which can include the cost of multiple servers required for its operations, called collectors.
Cyber Security Senior Engineer at a manufacturing company with 10,001+ employees
My experience with pricing, setup costs, and licensing for Varonis Platform has been good, with competitive costs.
Technical Consultant at Satcom Infotech Pvt Ltd
 

Valuable Features

Microsoft Defender for Office 365 enhances security with AI-driven phishing detection and robust protection across Microsoft 365 services.
Varonis Platform enhances data security and compliance with data classification, threat detection, and seamless integration with major platforms.
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
Varonis is excellent for scanning unstructured data sources like file shares, OneDrive, SharePoint, Azure Blob Storage, and S3s.
Cyber Security Senior Engineer at a manufacturing company with 10,001+ employees
Varonis Platform is agent-based and AI-driven for detection and response, identifying data based on its content and context.
Technical Consultant at Satcom Infotech Pvt Ltd
Varonis Platform helped us quickly identify stale data, permissioned folders, and unusual access patterns, significantly improving our data governance and security posture.
Sr Investigation Specialist at Ifood
 

Categories and Ranking

Microsoft Defender for Offi...
Ranking in Email Security
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (3rd), Microsoft Security Suite (9th), Secure Email Gateway (SEG) (2nd)
Varonis Platform
Ranking in Email Security
16th
Average Rating
8.4
Reviews Sentiment
6.3
Number of Reviews
20
Ranking in other categories
Data Loss Prevention (DLP) (9th), User Entity Behavior Analytics (UEBA) (6th), Data Governance (5th), SaaS Security Posture Management (SSPM) (1st), Data Security Posture Management (DSPM) (3rd), Compliance Management (8th), Ransomware Protection (7th), Identity Threat Detection and Response (ITDR) (6th), Insider Risk Management (1st), AI Security (8th)
 

Mindshare comparison

As of August 2026, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 5.7%, down from 11.6% compared to the previous year. The mindshare of Varonis Platform is 1.0%, up from 0.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3655.7%
Varonis Platform1.0%
Other93.3%
Email Security
 

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.
TarunKumar11 - PeerSpot reviewer
Global Leadership Council at a tech company with 10,001+ employees
Data governance has strengthened and automation now reduces risk and manual compliance work
Varonis Platform offers key features including data discovery, data classification, data analysis, governance, user and entity behavior analysis, also known as UEBA, which helps in ransomware detection, insider threat detection, and compliance reporting. It does a lot of automation from a remediation standpoint, as well as investigation and forensics. The number one feature that makes the biggest difference for my clients is visibility into unstructured data; that is the most difficult for organizations to achieve. They do not have a good understanding of where sensitive data resides, who has access to this data, whether this access is appropriate, and how data is being used. Varonis Platform provides visibility, governance, threat detection, and automated remediation around data. Varonis Platform is a great data discovery platform that provides visibility into sensitive data estimates and how it is being used. Clients have been able to reduce excessive permissions, strengthen their compliance posture, detect insider threats, and ransomware activity, which would otherwise be difficult and manual. Varonis Platform is deployed in my clients' organizations in a combination of all types. Many clients use Varonis Platform in a largely SaaS-based model since it is a data security platform consumed in this way, and many organizations still operate hybrid environments. As far as Varonis Platform is in a position to get the data source and identify systems, it can discover and classify more secure data. Deployment in most of our clients is cloud-based, connecting to Microsoft 365, AWS, or other SaaS applications such as Salesforce. In other environments, it is a hybrid deployment with SaaS and on-premises, including file servers, NAS devices, and AD servers.
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Use our free recommendation engine to learn which Email Security solutions are best for your needs.
909,725 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
11%
Manufacturing Company
9%
Financial Services Firm
9%
Comms Service Provider
7%
Financial Services Firm
15%
Manufacturing Company
11%
Healthcare Company
7%
Insurance Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise11
Large Enterprise32
By reviewers
Company SizeCount
Small Business3
Midsize Enterprise2
Large Enterprise15
 

Questions from the Community

What is your experience regarding pricing and costs for Microsoft Defender for Office 365?
My experience with pricing, setup, and licensing is that it's actually quite reasonable even on the licensing side as a standalone product. It's very competitive compared to what competitors are ch...
What needs improvement with Microsoft Defender for Office 365?
I think Microsoft Defender for Office 365 can be improved by creating more educational pieces about not just looking for malware. We are seeing a lot more malware-less emails that Defender for Offi...
What is your primary use case for Microsoft Defender for Office 365?
My main use cases for Microsoft Defender for Office 365 include email hygiene.
What needs improvement with Varonis Platform?
Varonis Platform could be improved because when I used it, we had a significant issue related to the large volume of data on that file share. Although Varonis Platform helped us gain more visibilit...
What is your primary use case for Varonis Platform?
My main use case for Varonis Platform is to monitor access to sensitive data across file shares, Microsoft 365, and SharePoint. The main objective is to identify overexposed data, reduce access ris...
What advice do you have for others considering Varonis Platform?
Varonis Platform receives a rating of seven out of ten. I chose seven out of ten because the user experience was easy, we could apply it and gain more visibility, but the performance of the solutio...
 

Also Known As

MS Defender for Office 365
SlashNext Complete
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Nottingham Building Society
Find out what your peers are saying about Microsoft Defender for Office 365 vs. Varonis Platform and other solutions. Updated: August 2026.
909,725 professionals have used our research since 2012.