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Microsoft Defender for Office 365 vs Microsoft Purview Data Loss Prevention 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:
 

ROI

Sentiment score
7.1
Microsoft Defender for Office 365 boosts efficiency, cuts phishing, integrates security, reduces tool costs, and mitigates risk.
Sentiment score
6.6
Microsoft Purview DLP reduces data leakage, compliance risks, and costs, while enhancing security operations and productivity without extra resources.
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
We save a lot of time for legal by using Microsoft Purview Data Loss Prevention when searching data for legal and HR and employee issues.
Staff Systems Administrator at a tech vendor with 1,001-5,000 employees
I have also seen fewer accidental data sharing incidents, improved audit readiness, and increased the efficiency of the security team without needing additional headcount.
Technique at Digitaltrack
In these days of data breaches and data leakages that result in huge regulatory fines, we have not had any data breaches that could result in such fines.
Head of Geographies; Data Protection Officer at a financial services firm with 10,001+ employees
 

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
5.9
Microsoft Purview Data Loss Prevention receives mixed reviews, praising documentation but noting slow and inefficient customer support in complex cases.
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
I rate it a ten because they are very quick to respond and very quick to escalate if needed.
Cloud Architecture Lead at bolder inc
Once we got to the Microsoft engineers, the experience was great.
Director of Cyber Security
In terms of support, it's top-notch and always available to help us with any support issues we raise.
Head of Geographies; Data Protection Officer at a financial services firm with 10,001+ employees
 

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
7.4
Microsoft Purview Data Loss Prevention is praised for its scalability and flexibility across industries, organizations, and complex environments.
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
The policy working and detection technology need enhancements.
Solution Architect at a tech services company with 51-200 employees
Microsoft Purview Data Loss Prevention scales well with the growing needs of our organization.
Head of Geographies; Data Protection Officer at a financial services firm with 10,001+ employees
Microsoft Purview Data Loss Prevention scales effectively.
Director, IT Infrastructure at a university with 1,001-5,000 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
7.8
Microsoft Purview Data Loss Prevention is stable and reliable, with minor lag, high stability ratings, and positive user feedback.
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
I would assess the stability and reliability of Microsoft Purview Data Loss Prevention as high.
Co-Owner and Principal Consultant at BriComp Computers
The stability and reliability of Microsoft Purview Data Loss Prevention is great.
Senior Infrastructure Engineer at a computer software company with 51-200 employees
I assess the stability and reliability of Microsoft Purview Data Loss Prevention as quite good because I don't think it's ever gone down, unlike other parts of Azure.
Director, IT Infrastructure at a university with 1,001-5,000 employees
 

Room For Improvement

Microsoft Defender for Office 365 needs improvements in usability, false positive reduction, phishing detection, scalability, and reporting capabilities.
Microsoft Purview DLP needs easier policy setup, improved third-party integration, real-time insights, and enhanced scalability features.
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
Business Premium users can get the data loss prevention features of E5, which is fantastic.
Senior Infrastructure Engineer at a computer software company with 51-200 employees
Implementing a degree of severity ranking is essential.
Director of Cyber Security
More guides, more examples, and more compliance frameworks such as NIST or even PCI compliance would be great.
Director, IT Infrastructure at a university with 1,001-5,000 employees
 

Setup Cost

Microsoft Defender for Office 365 is cost-effective with E5, costly standalone, requiring careful planning for subscription-based licensing.
Microsoft Purview DLP is cost-effective with 365 E5, but add-ons and advanced features can be expensive and complex.
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
In terms of pricing, I would say it's unlimited value because it's bundled in our A5 and E5 licensing situation.
Director, IT Infrastructure at a university with 1,001-5,000 employees
The pricing for Microsoft Purview Data Loss Prevention is generally set; E5 is required, but it comes with all other products, so I would say it is fine.
Security Engineer at baseVISION
Advanced DLP and insider risk features became expensive when we scaled at the enterprise level.
Soc Anaylst at Softcell Technologies Limited
 

Valuable Features

Microsoft Defender for Office 365 enhances security with AI-driven phishing detection and robust protection across Microsoft 365 services.
Microsoft Purview DLP excels in integrated data protection, policy controls, and automatic labeling, enhancing security and compliance in regulated sectors.
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
Microsoft Purview Data Loss Prevention prevents users from sharing sensitive information outside the organization based on the configurations that we've implemented.
Head of Geographies; Data Protection Officer at a financial services firm with 10,001+ employees
Microsoft Purview has helped improve our organization's ability to discover sensitive data significantly as we use eDiscovery Purview, which is incredibly helpful.
Staff Systems Administrator at a tech vendor with 1,001-5,000 employees
It finds social security numbers in the files when we scan for it, so that we can prevent those from leaving the company.
Managing Director, Chief Information Security Officer at a financial services firm with 201-500 employees
 

Categories and Ranking

Microsoft Defender for Offi...
Ranking in Microsoft Security Suite
9th
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Archiving (1st), Email Security (2nd), Advanced Threat Protection (ATP) (3rd), Secure Email Gateway (SEG) (2nd)
Microsoft Purview Data Loss...
Ranking in Microsoft Security Suite
13th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
36
Ranking in other categories
Data Loss Prevention (DLP) (1st)
 

Mindshare comparison

As of August 2026, in the Microsoft Security Suite category, the mindshare of Microsoft Defender for Office 365 is 3.8%, up from 2.9% compared to the previous year. The mindshare of Microsoft Purview Data Loss Prevention is 2.9%, up from 2.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Microsoft Security Suite Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3653.8%
Microsoft Purview Data Loss Prevention2.9%
Other93.3%
Microsoft Security Suite
 

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.
Rohit Jaiswar - PeerSpot reviewer
Soc Anaylst at Softcell Technologies Limited
Integrated controls have reduced insider risk and now protect sensitive data across our workforce
One standout feature about Microsoft Purview Data Loss Prevention is the tight integration with Insider Risk Management and Defender XDR, as it gives much better context during investigations instead of treating DLP as an isolated alerting tool. We also use endpoint DLP heavily to control USB, copy, print, clipboard, and browser upload activity, which has been very effective for remote workforce security. The best features Microsoft Purview Data Loss Prevention offers include real-time policy enforcement, endpoint DLP, and deep integration with Microsoft 365 plus Defender XDR. We also heavily rely on sensitive information type detection, adaptive policy tips, and insider risk integration to investigate suspicious user behavior with proper context. Another standout feature is the ability to control USB copy, browser uploads, print clipboards, and cloud sharing actions directly from endpoint policies. The integration with Microsoft Defender 365 and Defender XDR helps our team in day-to-day operations because DLP alerts are automatically correlated with endpoint identity, email, and user activity telemetry, which helps the SOC investigate incidents much faster from a single workflow. The sensitive information type detection makes a difference compared to other tools we have used because it is more effective than many legacy DLP tools. It understands context, exact data patterns, document labeling, and Microsoft 365 native content, reducing false positives while improving detection accuracy. Another strong feature of Microsoft Purview Data Loss Prevention is auto-labeling and policy inheritance with Microsoft's Information Protection, which helps maintain protection even after files are shared or moved across workloads. We also value the user coaching or policy tip capability because it educates users in real time instead of only blocking actions, which reduces repeated DLP violations significantly.
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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
7%
Computer Software Company
7%
Outsourcing 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 Business17
Midsize Enterprise7
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 is your experience regarding pricing and costs for Microsoft Purview Data Loss Prevention?
The pricing for Microsoft Purview Data Loss Prevention was manageable for us because we already had Microsoft 365 and Purview-related licensing, but advanced DLP and insider risk features became ex...
What needs improvement with Microsoft Purview Data Loss Prevention?
Microsoft Purview Data Loss Prevention can be improved as the endpoint DLP policy tuning can be complex in large environments, especially when balancing security with user productivity. False posit...
What is your primary use case for Microsoft Purview Data Loss Prevention?
Microsoft Purview Data Loss Prevention is used for monitoring and preventing sensitive data exfiltration across Exchange Online, Teams, SharePoint, OneDrive, and endpoints. From a SOC's perspective...
 

Also Known As

MS Defender for Office 365
Microsoft Endpoint Data Loss Prevention, MS Endpoint DLP, Microsoft Endpoint DLP
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
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Find out what your peers are saying about Microsoft Defender for Office 365 vs. Microsoft Purview Data Loss Prevention and other solutions. Updated: June 2026.
908,800 professionals have used our research since 2012.