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Fortinet FortiMail vs Trend Micro Deep Discovery Email Inspector comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Dec 3, 2024

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Microsoft Defender for Offi...
Sponsored
Ranking in Email Security
1st
Average Rating
8.4
Reviews Sentiment
7.1
Number of Reviews
49
Ranking in other categories
Advanced Threat Protection (ATP) (1st), Microsoft Security Suite (11th)
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 Deep Discovery ...
Ranking in Email Security
28th
Average Rating
8.0
Reviews Sentiment
7.0
Number of Reviews
7
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 Deep Discovery Email Inspector is 0.4%, up from 0.1% 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.
Rejwana Rahman - PeerSpot reviewer
Delivers strong security with potential for improved support efficiency
I sell solutions for security support. We offer an email gateway and serve bank clients I find Trend Micro to be a good solution for security purposes. In comparison to other software, SoftForce offers a very good solution. Trend Micro's technical support has room for improvement. More efficient…

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"The most valuable feature of Microsoft Defender for Office 365 is the ease of use."
"The product is not resource-intensive."
"Microsoft Defender for Office 365's most valuable features are safe attachments and safe links."
"Defender helps us prioritize threats across our organization."
"I like its investigation capabilities, as that is what is most important to me. It is fairly simple with a user-friendly interface."
"Microsoft Defender for Office 365 is a stable solution."
"Overall, I would rate Microsoft Defender for Office 365 at a ten."
"The initial setup is straightforward. You just add the license, click it, and then you can set up the rules. It is quite simple."
"The most valuable feature of the solution is its interface, allowing users to get around the solution easily. The integration capabilities in the solution are also very easy."
"Technical support is great. They are able to look at their patches and offer quick responses. We even have an account manager in the Middle East. They are very good."
"This solution is good for small and medium enterprise companies."
"For me, Fortinet FortiMail is the best solution I have ever tried."
"Fortinet FortiMail is easy to use and the detection rate is very good. You can customize content filters and profiles are done easily. Additionally, there is a sandbox integration feature that is good."
"Fortinet FortiMail's most valuable features are antispam, antivirus, database, and data loss prevention (DLP)."
"When combining this solution with other Fortinet products, such as FortiGate, it integrates well and provides a comprehensive protection package."
"The most valuable feature of the solution is the tool's ability to prevent phishing attacks."
"I find Trend Micro to be a good solution for security purposes."
"Trend Micro is a very good product."
"I would rate the solution's stability at ten out of ten."
"It can effectively monitor outbound and inbound devices."
"The most valuable feature of Trend Micro Deep Discovery Email Inspector is the simple analysis of phishing emails."
"I highly recommend Trend Micro Deep Discovery Email Inspector due to its security and scalability features."
"The solution's most valuable features include visibility into the network and fast sandboxing technology for alerts, though response time can vary."
"I like that it is very user-friendly and easy to install."
 

Cons

"Configuration at the mid-level could be improved for the support team."
"We are always looking for others tools to increase automation on tasks. There can be better integration with other solutions, such as PowerPoint and email."
"Microsoft Defender for Office 365's Mac functionality requires improvement to deliver the same level of protection found on Windows devices."
"Microsoft should provide more documentation for users so they can self-educate. I would like to see more documentation for advanced security features."
"Several simulation options are available within 365, and the phishing simulation could be better."
"There is room for improvement in terms of reporting."
"Configuring the default strategies and policies in Microsoft Defender for Cloud Apps generates a lot of noise and false positives."
"The product must provide better malware detection."
"The statistics and BI in general could be improved."
"Fortinet FortiMail should allow more flexibility with the content rules."
"The biggest room for improvement would be the deployment. It will be hard for someone who doesn't understand the interface to deploy. If you understand it, you can find your way around the problems."
"The solution could be improved by providing a virtual machine facility with a complete set of options in the VM setup."
"Sometimes, the tool flags legitimate incoming traffic as spam."
"I would like it if the solution could be more affordable."
"Issues with the current email search functionality."
"Header inspection and containerization, like on-prem premises sandboxing, need enhancement."
"I would like to be able to send emails to a specific sandbox. This is a feature I would like to see added to the next release."
"Trend Micro's technical support has room for improvement. More efficient support should be provided, especially for standard support."
"The tool needs to incorporate faster response times for issue detection, more detailed reports, and better compatibility with older operating systems (e.g., Windows 7, 8, Server 2012)."
"The product's feature for message processing and blocking devices for bulk emails needs improvement."
"Trend Micro Deep Discovery Email Inspector could improve by making it easier to use. Microsoft solutions are easier to use."
"Trend Micro's technical support has room for improvement."
"It could be more user-friendly, easier to install, and lighter on the network. I would say that for all products because you do not need technical expertise to take care of it. When you have a user-friendly solution, it makes it easier for the vendors or companies like us. We do not have to go to the client's site to attend to issues all the time. Because it is user-friendly, they can take care of it after some training."
"The dashboard could be improved to match the quality of Check Point Harmony's dashboard."
 

Pricing and Cost Advice

"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"It is much more expensive than using another solution because we have had to include some options and upgrade our license."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
"Defender is a little bit more expensive as compared to others. We are in the manufacturing environment. So, we don't have a high budget for all of our endpoint devices. Its cost is a major concern for us."
"For licensing, it's usually a yearly package for customers who are subscribed to Office 365, but they can also pay on a monthly basis."
"I was working in the government and it was too expensive for us to use our Microsoft products."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
"The annual cost is $55,000."
"FortiMail has extra charges for installation, configuration, and project management."
"There is either an annual or six-month charge to use this solution. Fortinet FortiMail is cheaper than Proofpoint or Cisco Security, or other email security appliances."
"Compared to its competitors, Fortinet's products are available at a higher price range."
"It is a fairly priced product, considering what it does. The product offers good value for the money users spend on it."
"It is an expensive product."
"It's not as that expensive with the competitive different brands. The products sell a lot."
"The solution is reasonably priced compared to one of its competitors."
"It's an expensive solution, and you may not see a return on investment in a short period of time. However, you will see a return over a long period of time."
"The price of Trend Micro Deep Discovery Email Inspector is less expensive than Microsoft solutions."
"We pay for an annual subscription for this email security solution."
"The solution's pricing is high, and I would rate it an eight out of ten."
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
9%
Manufacturing Company
8%
Government
6%
Educational Organization
43%
Computer Software Company
9%
Financial Services Firm
6%
Government
4%
Computer Software Company
15%
Financial Services Firm
11%
Media Company
8%
Security Firm
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 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 is your experience regarding pricing and costs for Trend Micro Deep Discovery Email Inspector?
The licensing cost is reasonable, and while additional features may require extra licensing fees, the overall pricing...
What needs improvement with Trend Micro Deep Discovery Email Inspector?
The dashboard could be improved to match the quality of Check Point Harmony ( /products/avaya-workforce-engagement-re...
 

Also Known As

MS Defender for Office 365
FortiMail
Deep Discovery Email Inspector
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Magromer Cueros y Pieles S.A.
Bank Saint Petersburg, CEITEC S.A., Dar Al-Handasah, Mitsubishi Electric Information Systems, Motilal Oswal Financial Services Ltd, OKWAVE, Oman Arab Bank, VakifBank
Find out what your peers are saying about Fortinet FortiMail vs. Trend Micro Deep Discovery Email Inspector and other solutions. Updated: April 2025.
850,028 professionals have used our research since 2012.