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Fortinet FortiMail Cloud 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:
 

Categories and Ranking

Fortinet FortiMail Cloud
Average Rating
8.0
Reviews Sentiment
6.9
Number of Reviews
22
Ranking in other categories
Cloud Email (6th), Secure Email Gateway (SEG) (6th)
Microsoft Defender for Offi...
Average Rating
8.4
Reviews Sentiment
7.1
Number of Reviews
49
Ranking in other categories
Email Security (1st), Advanced Threat Protection (ATP) (1st), Microsoft Security Suite (11th)
 

Mindshare comparison

As of May 2025, in the Secure Email Gateway (SEG) category, the mindshare of Fortinet FortiMail Cloud is 4.5%, up from 1.5% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 29.5%, down from 39.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG)
 

Featured Reviews

Pravin Mandlik - PeerSpot reviewer
Provides enhanced email security with potential agent compatibility issues
There are definitely features that Fortinet should work on. I'm not the right person to implement those features. For a portable cloud solution, a customer has more affinity towards a solution where endpoint security is already in place. In endpoint security, they are not at the latest quadrant. That is why a customer with existing endpoint security solutions like Trend Micro might prefer a main security solution from that vendor. If we go for FortiMail Cloud and have a separate endpoint security solution, there are two agents that have to sit on a customer endpoint. From that perspective, Fortinet policies add an extra load to the endpoint. Maybe other solutions have an advantage when it comes to Fortinet.
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.

Quotes from Members

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

Pros

"The implementation was very professional. There are a lot of features I can get through Fortinet and FortiMail, such as security. FortiGuard is the most reliable and professional mitigation center to handle incidents and risk that I have to face."
"Fortinet and other software ensure that my company's email remains safe, helping to avoid access issues at some cost in production."
"If there is a problem somewhere Fortinet can act on it immediately. That is very important."
"It has the best feature for processed mail analysis."
"The deployment is simple."
"FortiMail Cloud is very fast."
"The most valuable features are the low price and its ability to integrate with other Fortinet products."
"This solution is easy to install. The deployment takes about forty-five minutes."
"I like its investigation capabilities, as that is what is most important to me. It is fairly simple with a user-friendly interface."
"The product is not resource-intensive."
"Does a thorough job of examining email and URLs for malicious content."
"Since we have started using the solution, there have been fewer compromises."
"The deployment capability is a great feature."
"Microsoft Defender for Office 365 helps people to work remotely. It is a secure solution. We don't need to use our company's computers or get VPN connections to the networks. I can control how they share screens and what they send to the devices. It keeps our organizations confidential and sensitive information safe."
"It also gives me good visibility because, with Defender, I'm using a Microsoft product to defend Microsoft products. The integration was really seamless and I have wide visibility because it picks up almost everything. Literally, I can see almost every activity that happens, from the e-mail to the workstation itself."
"Defender is a SaaS platform, so it offers more flexibility. Managing the permissions is easier. The solution's automated detection and response features are scalable."
 

Cons

"Networking should be simplified."
"I can't see the feedback to the FortiMail gateway."
"Fortinet FortiMail Cloud doesn't have AI features, making it an outdated tool for me."
"The tool's UI can be simple since it's cluttered now and you can't understand where you are going. It's not obvious to find out the menus or things that you are looking to find."
"It is slightly difficult to configure FortiMail in the cloud with Exchange on-premise, especially the quarantine mailbox access for end-users."
"FortiMail needs to develop further, particularly in integrating AI features, to keep up with rapidly advancing technology."
"They could look at strengthening anti-spam with the newly observed domains."
"Fortimail Cloud should include more advanced AI features that can analyze every traffic type."
"Microsoft needs to broaden its global support presence by establishing teams of subject-matter experts in all regions."
"Several simulation options are available within 365, and the phishing simulation could be better."
"The changes to customer service, specifically the new model for support agreements, are not favorable."
"We need a separate license and we don't know how to get the license that is required."
"There needs to be an improvement in integrating the product to work across multiple operating systems, and to have better support for non-Microsoft file types."
"Microsoft security solutions work as expected. They are constantly updating the solutions to make them better. At the same time, the changes can impact a customer's environment, and we need to adjust settings. Sometimes we aren't aware of the changes, and nothing is pushed from the backend automatically."
"They can improve their security in a way where a customer can know if all their attachments are safe or not to open through a report. The solution does its job perfectly, but it never reports to the customer whether those attachments have been stopped before or not."
"Microsoft Defender for Office 365 could improve by giving customers information on techniques to prevent threats. For example, information about best practices on how to protect their own devices against hackers and scammers, such as educational information or training. This would help others have a better understanding of cyber security. Additionally, there can be more security features added."
 

Pricing and Cost Advice

"When we're talking about pricing, other products have about the same price. That is normal."
"I see how manageable and flexible the licenses are."
"It's on a subscribed basis."
"The product's price is reasonable."
"I rate the price of Fortinet FortiMail Cloud a five on a one to ten scale, where one is the low price, and ten is the high price. It is an averagely priced product."
"The price of this solution could be more competitive."
"The licensing is for three years. In the beginning, we did not pay monthly, it was paid once for three years."
"The pricing depends on various factors, including the type of licenses and subscriptions you have procured"
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"The solution could be better by simplifying the business model of their licensing. It was hard to figure out how to get the licensing done for the environment, initially."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"The pricing is normal. Considering its popularity, it's not overpriced."
"The product is very expensive."
"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."
"The pricing has become expensive."
"While Microsoft Defender for Office 365 necessitates pricier E3 or E5 subscriptions, the extensive functionality offered by these licenses across various Microsoft products justifies the investment."
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849,686 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
7%
Hospitality Company
6%
Healthcare Company
5%
Computer Software Company
16%
Financial Services Firm
9%
Manufacturing Company
8%
Government
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

What do you like most about Fortinet FortiMail Cloud?
Content disarming and analysis are essential features in our email security setup
What is your experience regarding pricing and costs for Fortinet FortiMail Cloud?
The pricing for Fortinet FortiMail Cloud seems a bit high, although it is considered acceptable for the product's value. The solution provides cost-saving and scalable options, especially in a clou...
What needs improvement with Fortinet FortiMail Cloud?
The flexibility of the product is an area that could be improved. It would be beneficial to enhance flexibility for better adaptation to various customer environments.
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?
Money-wise, it is a part of the Office 365 ( /products/office-365-reviews ) suite, making it slightly more expensive compared to Trend Micro. Although Defender is free, you have to pay separately f...
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 met, making it challenging to ensure every system is protected. Troubleshooting ...
 

Also Known As

No data available
MS Defender for Office 365
 

Overview

 

Sample Customers

Black Gold Regional Schools, Amadeus Hospitality, Jefferson County, Chunghwa Telecom, City of Boroondara, Dimension Data
Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Find out what your peers are saying about Fortinet FortiMail Cloud vs. Microsoft Defender for Office 365 and other solutions. Updated: April 2025.
849,686 professionals have used our research since 2012.