Try our new research platform with insights from 80,000+ expert users

Microsoft Defender for Office 365 vs Microsoft Purview Compliance Manager 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
7.3
Microsoft Defender for Office 365 enhances email protection, reduces costs, and increases productivity, offering invaluable data security.
Sentiment score
7.8
Microsoft Purview Compliance Manager reduces costs by 50%, streamlines tasks, and is included in Office 365 E5 licensing.
It has also decreased our time to detection and response by about 15 to 20 percent.
Overall, cost of owning and operating our system goes down.
It's hard to quantify the return on investment we've seen from Microsoft Defender for Office 365.
The process is reduced from weeks to a day, showcasing a solid nine for return on investment.
 

Customer Service

Sentiment score
5.9
Microsoft Defender for Office 365 offers reliable support, praised for responsiveness, despite some challenges with clarity and third-party resolutions.
Sentiment score
4.7
Microsoft Purview Compliance Manager support faces mixed reviews, citing long resolution times and outsourced staff inefficiencies.
Over the past two years, there have been no critical problems.
we opened tickets, and they typically resolve them quickly.
Customer service and support have been fantastic.
Since I approach them with more complicated issues, it takes quite a bit of time to get through those two support tiers.
The support staff, who are often outsourced, seem not adequately equipped to handle issues quickly and efficiently.
The quality of support is affected because most support staff seem focused on obtaining five-star ratings rather than resolving problems thoroughly.
 

Scalability Issues

Sentiment score
8.2
Microsoft Defender for Office 365 scales seamlessly across configurations, supporting thousands of users with effortless integration and optimal performance.
Sentiment score
7.7
Microsoft Purview Compliance Manager excels in scalable deployment across environments but faces constraints in crafting detailed policies.
We have never faced scalability problems, and Microsoft manages it effectively.
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.
As services increase, eDiscovery capabilities also increase, allowing easy deployment.
It is straightforward since it scans everything, covering all aspects needed in our operations.
While the solution is scalable in terms of user numbers, there are limitations when creating more granular level policies.
 

Stability Issues

Sentiment score
7.7
Microsoft Defender for Office 365 is highly reliable, offering stable performance, quick issue resolution, and high user satisfaction ratings.
Sentiment score
7.9
Microsoft Purview Compliance Manager is reliable but needs improved eDiscovery and search functionality despite regular updates and changes.
The solution is stable, as we have been using it for the past two years.
I would assess the stability and reliability of Microsoft Defender for Office 365 as very stable, with barely any issues.
Overall, the stability and reliability of Microsoft Defender for Office 365 are good.
Despite stability, it needs to be more user-friendly and competitive compared to other eDiscovery tools.
It is reliable and I can depend on it.
In terms of latency, stability is not an issue.
 

Room For Improvement

Microsoft Defender for Office 365 needs enhanced virus protection, compatibility, UI, integration, reporting, and cost transparency to improve user experience.
Microsoft Purview Compliance Manager needs integration, UI improvements, cost reduction, and enhanced policy and monitoring features for better usability.
The main area for improvement is simplifying the implementation and rollout process.
Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published.
There is a different console for different things; I just want one consolidated console.
Microsoft Copilot Security converts human language to search queries using its AdLM language model.
The speed and accessibility, particularly in the user interface, require significant work.
The Purview Compliance Portal's log management could be more user-friendly, making data retrieval, like email logs, challenging.
 

Setup Cost

Enterprise users find Microsoft Defender for Office 365 pricing complex but valuable due to integration with Office 365 features.
Microsoft Purview Compliance Manager offers cost-efficient pricing, especially for existing Microsoft users, and is notably cheaper than competitors.
We've likely saved 30% of costs.
Money-wise, it is a part of the Office 365 suite, making it slightly more expensive compared to Trend Micro.
Microsoft is quite affordable with a lot of features available for any size organization.
I rate the pricing as a one since it is included in what I am already paying for, as part of the Microsoft 365 E5 licensing.
Microsoft Purview Compliance Manager is priced at 60% to 70% compared to some competitors.
 

Valuable Features

Microsoft Defender for Office 365 offers comprehensive security with real-time updates and automated threat response, enhancing multi-platform enterprise safety.
Microsoft Purview Compliance Manager streamlines multi-cloud data protection and compliance, enhancing visibility and integrating seamlessly with Microsoft 365.
It ranks the threats and allows us to prioritize those hitting us the hardest, such as email threats.
It provides end-to-end visibility on email threats such as phishing, extending beyond Exchange Online Protection.
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.
Microsoft Purview Compliance Manager's eDiscovery is essential for organizations using Outlook as their email service.
The most valuable feature is data classification retention since I deal with terabytes of data, and managing and monitoring it simplifies the process.
The best aspect is that it requires little to no time for implementation if I am using all of Microsoft's tools.
 

Categories and Ranking

Microsoft Defender for Offi...
Ranking in Microsoft Security Suite
10th
Average Rating
8.4
Reviews Sentiment
7.0
Number of Reviews
52
Ranking in other categories
Email Archiving (1st), Email Security (1st), Advanced Threat Protection (ATP) (2nd), Secure Email Gateway (SEG) (1st)
Microsoft Purview Complianc...
Ranking in Microsoft Security Suite
25th
Average Rating
8.0
Reviews Sentiment
7.1
Number of Reviews
9
Ranking in other categories
Data Governance (14th)
 

Mindshare comparison

As of July 2025, in the Microsoft Security Suite category, the mindshare of Microsoft Defender for Office 365 is 2.8%, up from 2.5% compared to the previous year. The mindshare of Microsoft Purview Compliance Manager is 1.4%, down from 1.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Microsoft Security Suite
 

Featured Reviews

Tolu Omolaja - PeerSpot reviewer
Great URL scanning and attachment scanning, but I would like more proactive threat analysis
The two main features that prove most beneficial for us are URL scanning and attachment scanning. URL scanning involves an automatic scan of links and emails. When a user clicks on a link within an email, the system promptly checks the link's safety. If the link is deemed safe, access is granted automatically. However, if it is flagged as unsafe, we receive feedback and notification to caution us about the potentially harmful link. At this point, we are presented with the option to proceed or return. I have personally witnessed the system identify a few unsafe links, making this the primary advantage of using the solution. The second crucial aspect is the scanning of attachments. When an email containing an attachment arrives, we receive a notification of the new email, along with information that the attachment is being scanned for threats. This additional layer of security provides peace of mind for our organization. While Microsoft Defender for Office 365 offers numerous features, these two stand out as particularly impressive and valuable to us.
Peter-Murphy - PeerSpot reviewer
Streamlined data management and improved compliance with efficient document classification
The most valuable feature is data classification retention since I deal with terabytes of data, and managing and monitoring it simplifies the process. Additionally, the system provides a dashboard showing our compliance status, which aids in managing compliance tasks. The compliance score feature allows me to assess and compare our compliance across organizations. I've also noticed efficiency gains, especially in handling subject access requests. Previously, these tasks were manual and time-consuming, but now they are streamlined, reducing the process from weeks to just a day.
report
Use our free recommendation engine to learn which Microsoft Security Suite solutions are best for your needs.
860,711 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
8%
Manufacturing Company
8%
Government
6%
Computer Software Company
14%
Financial Services Firm
12%
Healthcare Company
7%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

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 is your experience regarding pricing and costs for Microsoft Defender for Office 365?
Microsoft is quite affordable with a lot of features available for any size organization.
What needs improvement with Microsoft Defender for Office 365?
Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published. It's essential to enhan...
What do you like most about Microsoft Purview Compliance Manager?
We have more visibility of data and how it is being shared.
What is your experience regarding pricing and costs for Microsoft Purview Compliance Manager?
While not cheap, Microsoft Purview Compliance Manager is priced at 60% to 70% compared to some competitors. Additional costs may involve OCR page scanning.
What is your primary use case for Microsoft Purview Compliance Manager?
When I tried to set up Microsoft Purview Compliance Manager for my organization to ensure people are not sending PII documents, especially payment cards, using keywords for flagging, it disrupted o...
 

Also Known As

MS Defender for Office 365
Microsoft Compliance Manager
 

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 Compliance Manager and other solutions. Updated: June 2025.
860,711 professionals have used our research since 2012.