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MetaDefender vs Microsoft Defender for Office 365 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
4.3
MetaDefender improves ROI by automating threat detection, reducing manual work, and lowering malware incidents, benefiting larger organizations.
Sentiment score
7.1
Microsoft Defender for Office 365 boosts efficiency, cuts phishing, integrates security, reduces tool costs, and mitigates risk.
Having both cloud and on-premise solutions enables effective file sanitization and vulnerability detection while preventing attacks that save costs and protect reputation.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
MetaDefender has positively impacted my organization by reducing the risk of file-based attacks, which has significantly improved our overall defense against phishing and malware delivery techniques.
Manager at Cyvogenix
I believe it is worth the money, as it brings time-saving, cost-saving, and efficiency improvements, especially in large environments.
Network Security Engineer at EMAK For Integrated solutions
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
6.4
MetaDefender support is praised for responsiveness, professionalism, and expertise, especially Vlad, with efficient AI-assisted and clear communication.
Sentiment score
5.7
Microsoft Defender for Office 365 support is reliable but varies with subscription level and complexity of issues.
This can save time because many vendors, when they check something and ask for logs, need those logs from the beginning.
Cyber Security Architect at Diffiesec
When it comes to my communication with agents, I find they are responsive and professional.
Integration Technician at danet
Their customer service team, distribution team, and regional sales managers provide excellent aftercare and set us up for upselling across the entire MetaDefender portfolio.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
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
 

Scalability Issues

Sentiment score
6.2
MetaDefender supports high file volumes and scalable automation, adaptable for banking, defense, with flexible deployment for complex networks.
Sentiment score
7.8
Microsoft Defender for Office 365 efficiently scales with cloud-native design, ensuring reliable performance and seamless integration for diverse organizations.
You need to do some sizing before installation and understand exactly what you are seeking from the solution and how it fits your organization.
Infrastructure Securiy & Cyber Engineer at El Al
When you use one database for all instances, you can deploy ten different servers or ten different instances with a separate database for each one.
Cyber Security Architect at Diffiesec
We handle vast amounts of traffic from banking, defense, and critical national infrastructure.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
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
8.2
MetaDefender is stable and reliable, performing well with high file volumes and smooth integration despite occasional minor issues.
Sentiment score
7.8
Microsoft Defender for Office 365 offers consistently reliable performance with minimal downtime, high user ratings, and manageable minor issues.
The stability of the system is very high.
Cyber Security Architect at Diffiesec
MetaDefender is 100% stable, making it one of the best cybersecurity solutions we offer.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
I find it stable as it maintains good external stability with good availability and no major issues.
Network Security Engineer at EMAK For Integrated solutions
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

MetaDefender users seek improvements in scanning speed, cost, AI explainability, UI, documentation, automation, deployment, and notifications.
Microsoft Defender for Office 365 needs improvements in usability, false positive reduction, phishing detection, scalability, and reporting capabilities.
I want to see enhancements allowing for automatic ticket creation using APIs to streamline the workflow and assign tickets to respective teams.
Packaged Application Development Team Lead at a tech vendor with 10,001+ employees
MetaDefender should have a wizard or general policies that can be used for 80 percent of customers.
Cyber Security Architect at Diffiesec
Pricing is an important aspect in catering to customer budgets and is a must-have consideration for organizations.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
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
 

Setup Cost

MetaDefender's extensive security justifies its high price, with better value than competitors; custom quotes are recommended.
Microsoft Defender for Office 365 is cost-effective with E5, costly standalone, requiring careful planning for subscription-based licensing.
When someone attempted to buy from us one instance of OPSWAT, it was about nine thousand dollars for multi-scanning with eight engines and also the CDR module.
Cyber Security Architect at Diffiesec
The price varies based on deployment types; we only used it for file transfer and cloud integration rather than email, which kept it within our budget.
Senior Associate at a educational organization with 11-50 employees
Regarding pricing, setup cost, and licensing, I find the pricing for kiosks, cloud, deep CDR, and adaptive sandbox appropriate.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
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

MetaDefender offers advanced malware protection features including multi-engine scanning, threat intelligence, sandboxing, and seamless system integration for enhanced security.
Microsoft Defender for Office 365 enhances security with AI-driven phishing detection and robust protection across Microsoft 365 services.
I believe this is very effective and is the most effective engine of OPSWAT because customers ask for OPSWAT for two main reasons: the CDR capabilities and the multi-scanning engines.
Cyber Security Architect at Diffiesec
MetaDefender's core philosophy of trusting no file means it scans files, rebuilds them, and verifies their reputation, ensuring they contain no malicious content.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
The integration of multi-scanning and Content Disarm and Reconstruction is truly helpful because we can utilize it in other products such as email integration with ICAP capability, and we are also using it in web scanning.
Project Engineer at i-Secure Networks & Business Solutions Inc.
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
 

Categories and Ranking

MetaDefender
Ranking in Advanced Threat Protection (ATP)
12th
Average Rating
8.8
Reviews Sentiment
6.0
Number of Reviews
15
Ranking in other categories
Anti-Malware Tools (4th), Threat Intelligence Platforms (TIP) (6th), Cloud Detection and Response (CDR) (5th)
Microsoft Defender for Offi...
Ranking in Advanced Threat Protection (ATP)
3rd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Archiving (1st), Email Security (2nd), Microsoft Security Suite (9th), Secure Email Gateway (SEG) (2nd)
 

Mindshare comparison

As of August 2026, in the Advanced Threat Protection (ATP) category, the mindshare of MetaDefender is 1.8%, up from 0.9% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 6.4%, down from 13.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Advanced Threat Protection (ATP) Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3656.4%
MetaDefender1.8%
Other91.8%
Advanced Threat Protection (ATP)
 

Featured Reviews

RS
Senior Associate at a educational organization with 11-50 employees
File protection has improved and now keeps millions of daily transfers secure and compliant
In my organization, while using this tool, we found that there were a few files flagged as suspicious; however, those were not suspicious and it was a false positive, so that can be improved. False positive results were an issue, and it took time to scan files if the file size was greater than 1 GB. For larger files greater than 1 GB, it needs to be improved. In some cases, the reconstruction of the file led to a failure of code deployment and it flagged a valid file as malicious, which was not effective; however, in other types of files, it was very effective and could scan files properly. We have already covered all the main suggestions; however, it can be improved to reduce false positive results, and scanning could be faster to process more files in a day.
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.
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909,725 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
10%
Educational Organization
10%
Healthcare Company
9%
Computer Software Company
11%
Manufacturing Company
9%
Financial Services Firm
9%
Comms Service Provider
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise2
Large Enterprise11
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise11
Large Enterprise32
 

Questions from the Community

What is your experience regarding pricing and costs for MetaDefender?
My experience with pricing, setup cost, and licensing is that it is good and at par with other competitors.
What needs improvement with MetaDefender?
I would like to see improvements in the tool's automation capabilities. It would be beneficial if it could automatically create tickets and notify responsible teams about any identified vulnerabili...
What is your primary use case for MetaDefender?
The major use cases of MetaDefender in my work environment involve preventing malware updates, data breaches, and compliance violations through scanning files for malware, vulnerabilities, and sens...
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.
 

Also Known As

OPSWAT MetaDefender, MetaDefender Core
MS Defender for Office 365
 

Overview

 

Sample Customers

Information Not Available
Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Find out what your peers are saying about MetaDefender vs. Microsoft Defender for Office 365 and other solutions. Updated: August 2026.
909,725 professionals have used our research since 2012.