No more typing reviews! Try our Samantha, our new voice AI agent.

Microsoft Defender for Office 365 vs Trend Micro Email Security [EOL] comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jun 3, 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
6.0
Trend Micro Email Security is cost-effective, enhances protection, saves money, and improves management efficiency without needing more staff.
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
Since Trend Micro launched in the Pakistani market, it has offered a great return on investment with competitive financial costing.
Soc Team Lead at Super Secure
The IT security team now spends significantly less time investigating phishing emails, cleaning up spam-related tickets, and responding to user-reported malicious messages.
Senior Engineer Systems & Security at Connex Information Technologies
Trend Micro Email Security [EOL] is the best solution to provide email security.
Engineer Systems & Security at a tech consulting company with 51-200 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
6.6
Trend Micro Email Security support is helpful but varies in speed and consistency, with potential for improvement.
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
We have local support here as well, with local Trend Micro engineers that visit the site whenever there is a high escalation case, arriving within hours if there is a geolocation difference, or within five to six hours.
Soc Team Lead at Super Secure
Clients are generally very satisfied with the various types of support available.
CEO at Haniya Technologies
The area of support that requires improvement would be the response time.
Senior Engineering Director at a insurance company with 201-500 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
7.2
Trend Micro Email Security offers scalable, flexible solutions for enterprises with a cloud-based model and credit-based licensing.
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
Overall, stability and scalability are two of its strong points, especially for organizations that want consistent protection without managing underlying infrastructure.
Senior Engineer Systems & Security at Connex Information Technologies
All of the SaaS modules I've worked with are highly scalable, and I do not face any reliability or availability issues while scaling.
Soc Team Lead at Super Secure
We have a company that sends almost 2,000 to 3,000 emails per hour or more.
Cybersecurity Engineer with 11-50 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
8.1
Trend Micro Email Security [EOL] is stable and reliable, with minimal downtime and occasional minor web proxy issues.
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 your MX record and all configurations are in place, you don't experience downtime.
Soc Team Lead at Super Secure
I have never experienced downtime with this platform.
Cybersecurity Engineer with 11-50 employees
The reliability and stability of Trend Micro Email Security [EOL] for me is quite solid; till today, I have not found any downfall issue or any compromise issue.
AVP - IT Systems Administrator at National Bank of Pakistan
 

Room For Improvement

Microsoft Defender for Office 365 needs improvements in usability, false positive reduction, phishing detection, scalability, and reporting capabilities.
Trend Micro Email Security needs improved support, integration, reporting, user interface, spam filtering, cost, scalability, and customization.
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
If there is a product that can provide a centralized view Trend Vision One does, it really grabs the customer's interest because customers usually don't have to buy separate EDR, XDR, or SIEM solutions or a console for their SOC analyst or email security team.
Soc Team Lead at Super Secure
I would apply different policies to classify or categorize emails such as spam or not spam and inspect the content of the email and attachments to check for viruses or malware.
Network And Security Architect Consultant at AssurOne Group SA
There are other areas for improvement with Trend Micro Email Security [EOL], especially with the AI security, where additional protection should be added such as LLM, which is called large language models, AI agents, then there should be a vector database, AI APIs, that integration, and AI-generated contents, which would be great, especially with current features with Mimecast, and especially with the banners.
Project Management IT Infrastructure Infrastructure Officer (Senior ) at a retailer 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.
Trend Micro Email Security is generally seen as reasonably priced, balancing features and flexibility, though opinions on cost vary.
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
Prices range from 11 to 12 dollars for licenses and can fluctuate up and down.
CEO at Haniya Technologies
A great benefit is that if you buy a license for 100 servers and 100 mailboxes, and if your mailboxes increase to 120 while your servers decrease to 80, you can reallocate credits from unused email security to your mailboxes.
Soc Team Lead at Super Secure
This is the biggest consideration companies think about when deciding to implement Trend Micro Email Security.
Cybersecurity Engineer with 11-50 employees
 

Valuable Features

Microsoft Defender for Office 365 enhances security with AI-driven phishing detection and robust protection across Microsoft 365 services.
Trend Micro Email Security excels in phishing protection and spam filtering, offering robust integration, data protection, and comprehensive threat reporting.
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
It does provide me with centralized visibility and management across protection layers. It can integrate all of the separate EDR, XDR, or SIEM solutions, and if you have cloud security applications, all can be integrated and viewed in a single console.
Soc Team Lead at Super Secure
When we implemented Trend Micro Email Security, we found that about 80% of emails were blocked because they are phishing and spam.
Cybersecurity Engineer with 11-50 employees
The service updates to the latest antivirus solution signatures from the cloud and identifies threats in emails.
Security Engineer at LTI Mindtree
 

Categories and Ranking

Microsoft Defender for Offi...
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), Microsoft Security Suite (9th), Secure Email Gateway (SEG) (2nd)
Trend Micro Email Security ...
Average Rating
8.2
Reviews Sentiment
6.7
Number of Reviews
47
Ranking in other categories
No ranking in other categories
 

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.
AsadAli - PeerSpot reviewer
Soc Team Lead at Super Secure
Centralized protection has transformed email security and incident investigations by reducing false positives and improving behavioral threat detection
The challenges include the challenge of finalizing a product that has all the security features or capabilities that are usually required. For example, if there is an EDR platform that's just monitoring IDS signatures, it won't be as beneficial as one with behavioral monitoring and other critical aspects required according to the best practices of the industry. Additionally, if there is a product that can provide a centralized view Trend Vision One does, it really grabs the customer's interest because customers usually don't have to buy separate EDR, XDR, or SIEM solutions or a console for their SOC analyst or email security team. These challenges consist of managing multiple teams and products. Trend Micro Email Security comes in and solves these problems.Trend Micro Email Security is generally a bit more difficult to implement compared to the rest of the solutions such as network security modules or EDR modules, which are much easier. Trend Micro Email Security has some complexities in implementation, but there aren't any significant shortcomings that require Trend Micro to improve.
report
Use our free recommendation engine to learn which Email Security solutions are best for your needs.
910,956 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%
Construction Company
9%
Financial Services Firm
9%
Manufacturing Company
8%
Outsourcing Company
8%
 

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 Business32
Midsize Enterprise11
Large Enterprise12
 

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 Trend Micro Email Security?
Trend Micro Email Security reduces noise from false positives by deploying the solution in staging mode or learning mode to learn all traffic and compare it with signatures in the database. Sometim...
What advice do you have for others considering Trend Micro Email Security?
I am using Trend Vision One sensors. I am using the cyber risk exposure management, CREM capability. CREM is a solution called Splunk, which I use with XDR, Trend Micro, along with different securi...
What is your primary use case for Trend Micro Email Security?
I work with Trend Micro Email Security as a customer, and I also worked with an integrator. I use Trend Micro Email Security to secure all access for all endpoints, for example, for enterprise or f...
 

Also Known As

MS Defender for Office 365
No data available
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
MedImpact Healthcare Systems, Air21, Azra Solutions, CBOSS, De Montfort University, Depaeuw, DHR Health, Fukui University Hospital
Find out what your peers are saying about Proofpoint, Microsoft, Check Point Software Technologies and others in Email Security. Updated: August 2026.
910,956 professionals have used our research since 2012.