Fortinet FortiMail vs Microsoft Defender for Office 365 comparison

Fortinet FortiMail vs. Microsoft Defender for Office 365

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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

Cloudflare One

Mindshare comparison

As of June 2026, in the Email Security category, the mindshare of Cloudflare One is 1.6%, up from 1.6% compared to the previous year. The mindshare of Fortinet FortiMail is 2.9%, down from 4.8% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 6.3%, down from 12.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Email Security Mindshare Distribution
Product	Mindshare (%)
Microsoft Defender for Office 365	6.3%
Fortinet FortiMail	2.9%
Cloudflare One	1.6%
Other	89.2%

Email Security

Featured Reviews

Cobe Van Coller

Network Architect at IP Dimension

Cloud security has improved remote access and has reduced costs for smaller client sites

I have used Cloudflare One's Identity-Aware Proxy, and it is quite straightforward from what I have seen so far. The app registration on the Azure side integrates fully into Cloudflare, and I am very satisfied with that part because it is easy to set up. The integration of Cloudflare One's Secure Web Gateway and Zero Trust Network Access works without any issues. That part is pretty automatic, and if you complete the rest of the setup, it comes together by itself with no issues from my side. What makes it nice is that we can actually start replacing on-site firewalls at this stage for the smaller clients because it does not matter if they go to a coffee shop or work from home; they are still secured by the same connection. The hops get shorter and you get better latency. We have done testing to see if it is better. One thing that we did notice with our proof of concept with our current client is that they have people connecting from the UK. When they used their previous VPN solution, uploading CAD drawings and other files to the server took a long time. They mentioned that it is much quicker on Cloudflare One's solution. I definitely believe that is part of the improved performance, and I am satisfied with that as well. What is nice about Cloudflare One is that it makes the setup easier and also easier to train technicians to maintain it. Compared to legacy systems, we do not need to get fancy firewalls in place that are costly. That is definitely also a cost-saver with Cloudflare One.

Read full review

Abhimanyu Das

Senior Cybersecurity Engineer at Kyndryl

Targeted email filtering has reduced spam and phishing and now saves significant investigation time

The best features of Fortinet FortiMail include its techniques and tactics, which are highly effective compared to other solutions such as Microsoft 365. Although Fortinet FortiMail may not be as advanced in some aspects, it is well recognized for its strong performance in handling spam and phishing. It performs thorough mail scanning and also offers a sandboxing feature that enhances protection. Fortinet FortiMail has had a positive impact on my organization by significantly reducing unwanted email activities such as spam and phishing. It provides accurate detection and generates results that often exceed what can be achieved through manual analysis. Since deploying Fortinet FortiMail, I have observed a reduction in investigation time by at least 20 to 30 percent.

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Emeka Ndulu

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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Quotes from Members

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

Pros

"The capabilities of the software are strong enough for me to do what it's supposed to do. For me, we don't need to do a lot of configuration on our site. We just enable it and monitor it."

"It will take the blow rather than our applications should an attack occur."

"Cloudflare is by far the most effective solution that I have come across."

"For Cloudflare Access, I am using the free plan...The most valuable feature is their protection."

"It's a perfect solution from my perspective; it's easy to understand and easy to configure."

"Enables me to work from two locations."

"Cloudflare One has assisted in securing my remote workforce through a SASE solution with Cloudflare One and the Workers part, although I am not currently using the Workers component."

"Cloudflare is simple to use."

More Cloudflare One pros

"The most valuable features of Fortinet FortiMail are its virus outbreak prevention and FortiSandbox integration."

"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."

"The most valuable feature of Fortinet FortiMail is its fully detailed dashboard."

"Fortinet FortiMail is a very good product and reliable, and we find it easy to sell it."

"The spam filtering is great."

"This solution is good for small and medium enterprise companies."

"The technical support is excellent."

"The important feature is the application control, which makes administration much easier. It also has an intrusion prevention feature. There's also the wireless functionality, which works well with Huawei devices."

More Fortinet FortiMail pros

"We have seen a return on investment because if we would have received a phishing email, Microsoft Defender for Office 365 would help out to detect the threat instead of crashing down the whole company."

"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 ability to respond to threats if very important."

"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."

"Defender for Office 365 has helped eliminate having to look at multiple dashboards and that is the aspect I like most about it. It is simpler, effective, and convenient. The users like the process efficiency."

"It has significantly decreased my time to detection and response."

"The feature I like the most about Microsoft Defender for Office 365 is that it typically runs in the background—you do not know it is there until you need to access it."

"My experience deploying Microsoft Defender for Office 365 was seamless."

More Microsoft Defender for Office 365 pros

Cons

"The response time for support must be reduced."

"The tool should provide on-premise versions. Currently, all versions are cloud-based."

"Operating and tuning the product is difficult."

"Feedback could be enhanced. While I work efficiently with Clover as a partner in Mexico City, sometimes the information and requests are easier to manage with more concrete solutions."

"Cloudflare Zero Trust Platform needs to improve its documentation. It took time to do the implementation."

"When there are any dynamic changes in complex applications, the tool takes a lot of time, making its analytics-related area a major matter of concern where improvements are needed."

"Cloudflare DDoS has poor technical support."

"Our customers no longer use Cloudflare because its service is subpar."

More Cloudflare One cons

"The tool needs to improve its pricing policy. Also, it needs to be more user-friendly. I would want it to improve email security as well."

"Fortinet FortiMail's technical support team has shortcomings and needs improvement."

"The infrastructure could be improved. The data leak prevention could also be better."

"It would be nice if we could manage the solution from the cloud so I could handle things off-site if necessary."

"The support could be faster because we've been receiving complaints from customers, they say that when they raise a ticket, it doesn't take 24 hours to respond, sometimes the support responds after three days. This is a lot of time."

"My company pays around 28.000 Egyptian Pounds per year for this program. It is rather expensive in my opinion."

"The UI could be better."

"Fortinet FortiMail is considered overpriced by Indian rupee standards. My organization is not profit-making, and academic pricing is required, but it may not be available for security products like FortiGate."

More Fortinet FortiMail cons

"Specifically, within Microsoft Defender for Office 365, I want it to improve the DLP capabilities."

"We need a separate license and we don't know how to get the license that is required."

"We still see many false positives from time to time with Microsoft Defender for Office 365, so it would be good if we can reduce those false positives and provide better workflows for our end users, as sometimes they may not know what to do when they encounter a false positive."

"If you look at other products, such as Wiz or Palo Alto's cloud, because they also have similar components in terms of how they protect cloud infrastructure or enable cloud security, Microsoft Defender for Office 365 is not up to that extent."

"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."

"This product's effectiveness could be improved, in terms of detecting unwanted spam or even malware between the emails, compared to other products."

"You should be able to deploy Defender for every subscription without the need to add servers."

"Microsoft wants its well-paying customers to finish testing some of its half-baked products, find bugs, and report bugs back to Microsoft's team, which is a little frustrating for those who have to manage it and roll it up to thousands of people across the organization."

More Microsoft Defender for Office 365 cons

Pricing and Cost Advice

"The price tag is no longer $200,000, but rather $300,000 to $400,000. It's twice."

"Cloudflare Zero Trust Platform's pricing is good."

"The pricing is somewhere in the middle. I would rate the pricing a seven out of ten."

"The prices are slightly expensive."

"The solution's pricing lacks transparency."

"The pricing of the solution is cheap. The licensing cost is also very low. I rate the cost and pricing a three out of ten."

"My company has to make yearly payments towards the licensing costs attached to the solution. There are no hidden charges apart from the licensing costs of the solution."

"The solution is not that expensive."

"This is a good solution and value for the money."

"FortiMail has extra charges for installation, configuration, and project management."

"Pricing is based on initial license purchase and use volume."

"It's not as that expensive with the competitive different brands. The products sell a lot."

"Fortinet FortiMail is inexpensive."

"9,000 Euro per annum for Fortinet Mail and sandbox."

"There is a license required for this solution and it is on an annual basis. I am satisfied with the price."

"The tool is very expensive."

More Fortinet FortiMail pricing and cost advice

"Defender for 365 comes in various plans and licenses, along with other Microsoft security solutions. Purchasing this kind of package or security bundle gives good value for money, and that's what I recommend."

"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."

"The pricing has become expensive."

"The product is expensive."

"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."

"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."

"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."

"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."

More Microsoft Defender for Office 365 pricing and cost advice

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900,125 professionals have used our research since 2012.

Top Industries

By visitors reading reviews

Construction Company

19%

Comms Service Provider

10%

Financial Services Firm

Manufacturing Company

Financial Services Firm

Manufacturing Company

Computer Software Company

Construction Company

Computer Software Company

12%

Manufacturing Company

Financial Services Firm

Comms Service Provider

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	10
Midsize Enterprise	1
Large Enterprise	12

By reviewers
Company Size	Count
Small Business	32
Midsize Enterprise	23
Large Enterprise	15

By reviewers
Company Size	Count
Small Business	24
Midsize Enterprise	11
Large Enterprise	32

Questions from the Community

What is your experience regarding pricing and costs for Cloudflare Zero Trust Platform?

Pricing is competitive. Akamai is more expensive, in my view.

What needs improvement with Cloudflare Zero Trust Platform?

In my opinion, Cloudflare One can be improved mainly through compatibility, as the integration should be much simpler...

What is your primary use case for Cloudflare Zero Trust Platform?

Cloudflare One's primary use case for my organization is to protect servers and to provide remote access with the VPN...

What is your experience regarding pricing and costs for Fortinet FortiMail?

The setup cost is a little bit costly.

What needs improvement with Fortinet FortiMail?

I think they should improve Fortinet FortiMail on-premises by enhancing its user interface. Additional features they ...

What is your primary use case for Fortinet FortiMail?

I do have a partnership with Fortinet. I have been both a partner and reseller.

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...

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 ...

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.

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Product Reports

Cloudflare One

Download Cloudflare One product report

Fortinet FortiMail

Download Fortinet FortiMail product report

Microsoft Defender for Office 365

May 2026

Microsoft Defender for Office 365 report

Download Microsoft Defender for Office 365 product report

Also Known As

Cloudflare Area 1 Email Security, Cloudflare Bot Management, Cloudflare Gateway, Cloudflare Zero Trust Platform, Cloudflare DDoS, Cloudflare SASE & SSE Platform

FortiMail

MS Defender for Office 365

Overview

Cloudflare One is a comprehensive platform for security, performance, and connectivity. It provides features like rate limiting, DDoS protection, and application access, tailored to enhance user experience while securing internet access and accelerating communications.

Designed to integrate security measures with ease of use and scalability, Cloudflare One offers a secure web gateway and zero trust network access. These features ensure seamless setup and operation, making connectivity reliable and protected. Users appreciate its integrated console, intuitive interface, and the ability to manage risk effectively. It offers straightforward deployment, improves latency, and boasts cost-effectiveness. While its onboarding process and documentation need enhancement, its value in content delivery and application shielding is notable. Despite challenges in integrating Cloudflare Access with existing VPNs and the need for better automation and support, it remains vital for DNS and infrastructure protection.

What features make Cloudflare One stand out?

Rate Limiting: Controls the traffic rate to prevent abuse.
DDoS Protection: Shields applications from distributed denial-of-service attacks.
Secure Web Gateway: Provides secure internet access with seamless operation.
Zero Trust Network Access: Ensures secure, application-based connectivity without relying on traditional VPNs.
Access for Connectivity: Facilitates access to internal applications securely.

What benefits should users look for in reviews?

Security: Robust measures for DNS and browsing protection.
Performance: Enhanced site accessibility and communication speed.
Cost-Effectiveness: Offers competitive pricing for its features.
Ease of Deployment: Straightforward and efficient setup process.

In industries like finance, retail, and technology, Cloudflare One is crucial for enabling secure remote access and protecting web applications against dynamic threats. It supports compliance access policies and enhances content delivery, playing a key role in safeguarding digital infrastructure.

Cloudflare

Fortinet FortiMail is a robust email security platform offering anti-spam, antivirus, and anti-phishing capabilities. It integrates with Fortinet products to ensure seamless protection against email threats in on-premises, cloud, and hybrid environments, enhancing secure communication for businesses.

Fortinet FortiMail is designed to protect against a range of email threats including spam, phishing, and malware, ensuring email safety for organizations. It operates as both a gateway and server, allowing for secure filtering of incoming and outgoing emails. The integration with Fortinet’s suite of security tools provides a comprehensive approach to managing threats effectively, while user-friendly interfaces and detailed reporting systems aid in threat monitoring and management. Frequent updates are implemented, though scalability and web console enhancements are necessary for improved performance.

What are the key features of Fortinet FortiMail?

Anti-Spam: Provides reliable filtering to block unwanted emails.
Antivirus: Ensures protection against harmful viruses.
Anti-Phishing: Prevents phishing attempts through advanced detection.
Sandboxing: Enhances threat detection to manage email security efficiently.
Integration: Seamlessly works with other Fortinet products for unified security.

What benefits should users expect from Fortinet FortiMail?

Comprehensive Security: Offers robust protection against multiple email threats.
Ease of Use: Features a user-friendly interface for better accessibility.
Detailed Reporting: Provides insights into threat management activities.
Reliable Performance: Delivers consistent updates for maintaining email protection.

Fortinet FortiMail is implemented by companies across industries seeking to secure their email communications. In healthcare, it protects sensitive patient information, while in finance, it safeguards transactional data against phishing attacks. Retailers utilize FortiMail to prevent data breaches from fraudulent emails, demonstrating its versatility in diverse sectors.

Fortinet

Microsoft Defender for Office 365 offers real-time email security, enhancing threat detection through integration within the Microsoft ecosystem. Its user-friendly interface and central management streamline operations, providing robust protection against phishing, ransomware, and malware.

Defender for Office 365 is focused on efficiently securing email communication by safeguarding against phishing, malware, and spam threats. With its strong integration with other Microsoft services, it is tailored to improve endpoint security and identity protection. Its centralized management tools simplify threat prioritization, while the automated threat response capabilities ensure swift actions against potential risks. Organizations leverage its capabilities to efficiently manage their cybersecurity efforts, particularly in remote work environments, while maintaining a secure system across Office 365 applications and Azure-hosted services.

What are the key features?

Real-time Email Protection: Continuously monitors and protects email communications.
Safe Attachments and Links: Scans attachments and links for potential threats.
Anti-Phishing Measures: Provides tools to detect and block phishing attempts.
Integration with Microsoft Services: Seamlessly connects with other Microsoft applications for enhanced security.
Automated Threat Responses: Activates immediate responses to detected threats.

What benefits should users expect from reviews?

Time Savings: Automates processes to reduce manual threat management efforts.
Improved Cybersecurity: Strengthens organizational defenses against various cyber threats.
Efficient Remote Work: Enhances protection for remote teams and virtual collaborations.
Comprehensive Coverage: Extends protection across Office 365 and Azure services.

Implementations of Defender for Office 365 vary across industries, optimizing email security for sectors such as finance, healthcare, and education. In finance, it aids in protecting sensitive financial data from phishing and fraud. Healthcare benefits from secure communications, ensuring patient data privacy. Educational institutions use it to maintain secure virtual learning environments against cyber threats.

Microsoft

Sample Customers

23andMe

Magromer Cueros y Pieles S.A.

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.

Fortinet FortiMail vs. Microsoft Defender for Office 365