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Fortinet FortiMail vs Trend Micro Email Security comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Apr 20, 2025

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
7.2
Microsoft Defender for Office 365 provides enhanced security, yielding financial savings and efficiency gains through improved threat detection and data protection.
Sentiment score
7.6
Fortinet FortiMail boosts email security, saves costs, reduces spam, and consolidates functions, increasing reliability and efficiency for users.
Sentiment score
7.6
Entities reported substantial ROI from Trend Micro Email Security, highlighting cost savings, enhanced protection, and improved security posture.
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.
It offers cost savings compared to Cisco, which was very expensive.
 

Customer Service

Sentiment score
7.0
Microsoft Defender for Office 365 generally offers efficient support, but improvements in responsiveness and handling complex scenarios are desired.
Sentiment score
6.5
Fortinet FortiMail is praised for competent support, though some experience delays; elite support offers quicker assistance for a fee.
Sentiment score
7.6
Trend Micro Email Security support is praised for responsiveness and expertise, though response times vary by region.
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.
I have direct communication with Kenyan system engineers and local support in Ethiopia, enabling good support.
Fortinet's technical support offers high-quality support.
Clients are generally very satisfied with the various types of support available.
 

Scalability Issues

Sentiment score
8.2
Microsoft Defender for Office 365 excels in scalability, accommodating any organization size with efficient cloud-based performance and seamless updates.
Sentiment score
7.4
Fortinet FortiMail is scalable, integrates well with infrastructures, effectively handles email volumes, and is favored by various industries.
Sentiment score
7.8
Trend Micro Email Security is a scalable cloud-based solution ideal for medium to enterprise-sized businesses with strong user flexibility.
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.
 

Stability Issues

Sentiment score
7.7
Microsoft Defender for Office 365 boasts 99.9% availability, resolving issues quickly, with users rating its reliability highly.
Sentiment score
8.4
Fortinet FortiMail is praised for its high stability, minimal downtime, and user satisfaction in both on-premises and cloud deployments.
Sentiment score
8.0
Trend Micro Email Security is highly reliable, stable, easy to manage, and performs well with minimal reported issues.
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.
This stability is consistent across Fortinet products, including FortiGate firewall.
 

Room For Improvement

Microsoft Defender for Office 365 requires enhancements in virus-blocking, compatibility, integration, phishing detection, and global support.
Fortinet FortiMail needs upgrades in interface, integration, user management, security features, and overall user-friendliness for improved functionality.
Trend Micro Email Security needs stronger phishing detection, better integration, improved interface, and cost efficiency for enhanced user experience.
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.
Providing comprehensive documentation on how to deploy and configure would improve the solution.
The transition from on-premises devices to virtual appliances may be necessary as more organizations migrate email services to the cloud.
The area that could use some improvement in Fortinet FortiMail is the integration process.
The company also needs to work on pricing because it is quite costly compared to other products.
 

Setup Cost

Microsoft Defender for Office 365 is cost-effective with extensive features but may be costly for smaller organizations with limited budgets.
Fortinet FortiMail offers flexible, cost-effective pricing from $28,000 to $100,000, influenced by features, company needs, and regional factors.
Trend Micro Email Security is costly but offers great enterprise value, with pricing around $6,000 annually for 300 users.
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.
Fortinet FortiMail is considered overpriced by Indian rupee standards.
Prices range from 11 to 12 dollars for licenses and can fluctuate up and down.
 

Valuable Features

Microsoft Defender for Office 365 provides integrated threat protection, risk notifications, and productivity enhancements through a single management console.
Fortinet FortiMail offers advanced spam detection, easy management, comprehensive security, scalability, performance, and cost-effective email filtering with real-time updates.
Trend Micro Email Security provides comprehensive protection with advanced features, easy management, and seamless integration for reliable email security.
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.
Its threat detection capabilities have been beneficial.
The most valuable features are Fortinet FortiMail's ability to protect from advanced features of email-based attacks, including protection against ransomware and malware attacks.
Fortinet FortiMail offers capabilities like settings for mail delivery, mail filtering, spam controls, and email bursting prevention.
The product is quite strong, and that is one reason most clients are replacing their existing email security solutions with it.
 

Categories and Ranking

Microsoft Defender for Offi...
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Ranking in Email Security
1st
Average Rating
8.4
Reviews Sentiment
7.1
Number of Reviews
52
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (1st), Microsoft Security Suite (11th), Secure Email Gateway (SEG) (1st)
Fortinet FortiMail
Ranking in Email Security
6th
Average Rating
8.6
Reviews Sentiment
7.0
Number of Reviews
64
Ranking in other categories
No ranking in other categories
Trend Micro Email Security
Ranking in Email Security
8th
Average Rating
8.0
Reviews Sentiment
7.2
Number of Reviews
27
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of May 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 12.9%, down from 18.3% compared to the previous year. The mindshare of Fortinet FortiMail is 4.9%, down from 5.9% compared to the previous year. The mindshare of Trend Micro Email Security is 2.7%, down from 3.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security
 

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.
MOHAN SUKUMAR - PeerSpot reviewer
Secure email management improves through advanced filtering and dynamic virus scanning
Fortinet FortiMail offers capabilities like settings for mail delivery, mail filtering, spam controls, and email bursting prevention. It also allows for email forwarding, dynamic filtering, and scanning based on virus signatures. I can set varying levels of security. The tool is flexible and provides essential features for mail security and management.
Nadeem Syed - PeerSpot reviewer
Offers comprehensive security, easy integration, and good support
It integrated easily. About 99% of the time, we do not face any challenges in integrating any product of Trend Micro with the existing network. It is usually compatible with all kinds of networks. They have recently added AI to all Trend Micro products. It makes life a little bit easier by catching viruses, providing solutions, and helping out whenever you are stuck somewhere. It is one of the very good features they have right now. For example, one of our clients experienced a network attack and became confused about resolving the issues. The AI was helpful by suggesting initial steps to solve the problem.
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
8%
Manufacturing Company
8%
Government
6%
Educational Organization
43%
Computer Software Company
9%
Financial Services Firm
6%
Government
5%
Computer Software Company
17%
Financial Services Firm
11%
Comms Service Provider
7%
Insurance Company
6%
 

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 variou...
What is your experience regarding pricing and costs for Microsoft Defender for Office 365?
Money-wise, it is a part of the Office 365 ( /products/office-365-reviews ) suite, making it slightly more expensive ...
What needs improvement with Microsoft Defender for Office 365?
The main area for improvement is simplifying the implementation and rollout process. There are many conditions to be ...
What is your experience regarding pricing and costs for Fortinet FortiMail?
Fortinet FortiMail is considered overpriced by Indian rupee standards. My organization is not profit-making, and acad...
What needs improvement with Fortinet FortiMail?
Fortinet FortiMail should keep pace with features offered by cloud-based services like Google and Microsoft Outlook. ...
What do you like most about Trend Micro Email Security?
The tool provides a strong defense against attacks. It is also easy to use. Trend Micro Email Security's integration ...
What needs improvement with Trend Micro Email Security?
There is room for improvement in mobile device management. The company also needs to work on pricing because it is qu...
What advice do you have for others considering Trend Micro Email Security?
I would definitely recommend it. Trend Micro is better than any of its competitors. I would rate it a nine out of ten...
 

Also Known As

MS Defender for Office 365
FortiMail
No data available
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Magromer Cueros y Pieles S.A.
MedImpact Healthcare Systems, Air21, Azra Solutions, CBOSS, De Montfort University, Depaeuw, DHR Health, Fukui University Hospital
Find out what your peers are saying about Fortinet FortiMail vs. Trend Micro Email Security and other solutions. Updated: April 2025.
850,671 professionals have used our research since 2012.