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Microsoft Defender for Office 365 vs Microsoft Purview Information Protection 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
6.9
Microsoft Defender for Office 365 offers strong ROI through security enhancements, cost savings, and improved company productivity despite measurement challenges.
Sentiment score
6.4
Microsoft Purview enhances protection, automates compliance, reduces response time, and supports growth, though exact savings are hard to quantify.
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
Purview can do a quick scan, and it doesn't use human resources, so it gets time to do things that we need humans to focus on.
Mgr Data Engineering at Avanade
The E5 license comes with different solutions like data discovery classification, CASB, DLP solutions, and Defender for Cloud.
Associate Director at LTI - Larsen & Toubro Infotech
The cost of data loss and your data going to a competitor is potentially massive.
Client Experience Officer at 1234 Micro Technologies
 

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
4.0
Users experience inconsistent Microsoft Purview support, citing slow responses and unresolved issues, despite some improvements in visibility and engagement.
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
Sometimes, I get a fast and knowledgeable response, while other times, I've experienced delays and received no resolution.
Client Experience Officer at 1234 Micro Technologies
It's hard to be an ambassador for a product when you know it will be hard to get support.
Mgr Data Engineering at Avanade
After our issues are reported, it takes a long time to find a resolution.
Director Security Architecture at a financial services firm with 5,001-10,000 employees
 

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
6.0
Microsoft Purview Information Protection is praised for scalability despite some concerns with data analytics speed and policy update intervals.
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
It can be scaled across different departments organization-wide very quickly and easily.
Client Experience Officer at 1234 Micro Technologies
It can handle large collections of data without issues.
Mgr Data Engineering at Avanade
Scalability can be improved by reducing these intervals.
Information Technology Senior Expert at Garanti Teknoloji
 

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
7.0
Microsoft Purview is stable and reliable, with minor delays and occasional drawbacks, fostering user trust and wide deployment.
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
Once implemented, I haven't had issues with its consistency.
Client Experience Officer at 1234 Micro Technologies
The product is stable, and whatever it does, it does better than any other thing.
Associate Director at LTI - Larsen & Toubro Infotech
Since identity is where everything is based, if that goes down, you're screwed.
Director, Network & Cloud Infrastructure at a legal firm with 501-1,000 employees
 

Room For Improvement

Users call for enhanced virus detection, cross-platform support, and pricing transparency in Microsoft Defender for Office 365.
Microsoft Purview requires better integration, pricing, navigation, and feature enhancements to address user concerns about functionality and support.
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
Effectiveness in Microsoft Purview Information Protection means enforcing the policy and making sure it works consistently across non-Microsoft products as well.
Director Security Architecture at a financial services firm with 5,001-10,000 employees
A lot of functionality in Microsoft Purview Information Protection is not exposed in an API officially yet, which has made a lot of implementation work difficult because we have to do click ops instead of DevOps.
CEO at Blue Cycle
Having a roadmap or updates about new releases would be helpful for demonstrating to clients.
Client Experience Officer at 1234 Micro Technologies
 

Setup Cost

Microsoft Defender for Office 365 pricing is seen as flexible but potentially expensive, offering value in comprehensive security features.
Microsoft Purview offers competitive pricing, flexible enterprise licenses, and cost-effective bundled solutions, despite some complexity in licensing options.
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
I talked to people who had compared it to other products on the market, and they're spending five figures to get started.
Mgr Data Engineering at Avanade
The E5 license covers most of the solutions for different technologies, so that way, it is good and more affordable compared to any other solution.
Associate Director at LTI - Larsen & Toubro Infotech
Our focus is on helping customers maximize their software investment.
Business Development Manager, Transformational Services at Dell Technologies
 

Valuable Features

Microsoft Defender for Office 365 enhances email security with anti-phishing, anti-malware, threat intelligence, and seamless integration for efficient management.
Microsoft Purview enhances data protection with encryption, automated labeling, and compliance, excelling in Microsoft ecosystem integration and management.
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 Copilot is an advantage because it's enterprise-grade AI.
Business Development Manager, Transformational Services at Dell Technologies
It's paramount to have a single solution for information protection.
Client Experience Officer at 1234 Micro Technologies
Regardless of the education, the employee might share the information anyway, so the AI shouldn't be the first point of failure. It should be a human making good decisions.
Mgr Data Engineering at Avanade
 

Categories and Ranking

Microsoft Defender for Offi...
Ranking in Microsoft Security Suite
10th
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
60
Ranking in other categories
Email Archiving (1st), Email Security (1st), Advanced Threat Protection (ATP) (2nd), Secure Email Gateway (SEG) (1st)
Microsoft Purview Informati...
Ranking in Microsoft Security Suite
13th
Average Rating
8.0
Reviews Sentiment
5.9
Number of Reviews
20
Ranking in other categories
Data Governance (7th), Data Privacy Management Software (3rd)
 

Mindshare comparison

As of December 2025, in the Microsoft Security Suite category, the mindshare of Microsoft Defender for Office 365 is 3.6%, up from 2.4% compared to the previous year. The mindshare of Microsoft Purview Information Protection is 1.6%, up from 1.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Microsoft Security Suite Market Share Distribution
ProductMarket Share (%)
Microsoft Defender for Office 3653.6%
Microsoft Purview Information Protection1.6%
Other94.8%
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.
Abhi T - PeerSpot reviewer
Associate Director at LTI - Larsen & Toubro Infotech
Achieve comprehensive data protection with reliable performance and room for enhanced discovery accuracy
The product is still in a growing phase. I could see that many use cases in their product are not capable enough in terms of detecting or protecting. Compared to other products, they are in the middle of bringing their solution up to the mark, so it is not a full-grown solution. They have to get more accurate results in terms of data discovery and classification. The second thing is their support; support from Microsoft takes a lot of time to get a response from their support team. The third thing is their OCR capability is not that great in terms of identifying the documents. We would love to see response times of less than 24 hours. Additionally, there is no way to check the policy's current status in terms of whether it got synced or not. You have to wait and test the use cases after 24 hours or after 48 hours, and once it starts working, then it appears the policy got implemented.
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Financial Services Firm
8%
Manufacturing Company
8%
Comms Service Provider
6%
Financial Services Firm
18%
Computer Software Company
12%
Manufacturing Company
7%
Retailer
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 Business5
Midsize Enterprise4
Large Enterprise12
 

Questions from the Community

What do you like most about Microsoft Defender for Office 365?
Threat Explorer is an invaluable tool for me, and it plays a crucial role in helping me discern the origins of various email campaigns, pinpointing where they emanate from, and identifying the indi...
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 do you like most about Microsoft Purview Information Protection?
It ensures that sensitive data is automatically safeguarded, even for email attachments, regardless of the user or device.
What is your experience regarding pricing and costs for Microsoft Purview Information Protection?
In my experience with Microsoft Purview Information Protection, the experience of pricing, setup costs, and licensing is confusing, especially knowing what I have to do for add-ons with buying SCUs...
What needs improvement with Microsoft Purview Information Protection?
I think the role of sensitivity labels in guiding AI interaction with Microsoft Purview Information Protection is pretty good, but for us, it's too general. It says, "Here's a dataset" and because ...
 

Also Known As

MS Defender for Office 365
Microsoft Information Protection
 

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. Microsoft Purview Information Protection and other solutions. Updated: December 2025.
879,371 professionals have used our research since 2012.