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 August 2026, in the Email Security category, the mindshare of Cloudflare One is 1.7%, up from 1.4% compared to the previous year. The mindshare of Fortinet FortiMail is 2.7%, down from 4.0% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 5.7%, down from 11.6% 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	5.7%
Fortinet FortiMail	2.7%
Cloudflare One	1.7%
Other	89.9%

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

"Cloudflare DDoS mitigates DDoS attacks."

"I'm very satisfied with the environment and the dashboard."

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

"The solution has different options that can be used to differentiate DDoS attacks."

"Cloudflare, in my opinion, was easy to implement."

"We mostly use Cloudflare WAF, and gets basic Cloudflaire DDoS, caching as extra bonus . We like the factor these features are all integrated into 1 console, simple to manage."

"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."

"Cloudflare Zero Trust Platform removes the risk of exposing the applications to the public."

More Cloudflare One pros

"Fortinet FortiMail is an industry-leading, multi-layered messaging security tool based on price and performance."

"Fortinet FortiMail's most valuable features are its performance and security."

"The anti-spam functionality is good and works well."

"At the end of the day, they look at the performance and the price, and Fortinet covers all the bases."

"We do have, as of late, spam outbreaks, and this solution has been pretty reliable in dealing with them."

"Both logging and reporting are very good, as well as the antivirus profiles, content emails, content profile, and application profile."

"For now, as per our experience with FortiMail in handling a large number of emails and spams as well, in the past three years, we have been protected and saved from any attacks from the outside."

"The filtering is really effective to protect any mail environment of any company."

More Fortinet FortiMail pros

"We use Microsoft Defender for its ability to integrate with existing business technologies, which is beneficial for protecting business areas."

"Since we have started using the solution, there have been fewer compromises."

"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 individuals within our organization who are affected."

"The most valuable feature is protection against malicious links, fishing, and impersonation. You can train people to be aware of these threats, but they're not always careful. When they're using their phones between meetings, they click on a link, and it's game over."

"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."

"It also gives the vulnerability status according to the versions you have selected. Let's say you have Google Chrome. It mentions the versions it has, and it updates. Within two hours of an update, it is reflected in the dashboard. That's really nice to have."

"One of our clients didn't have the budget to invest in a SOC team, but we deployed the solution for them, and they now run a SOC with only one analyst."

"The DLP feature of Microsoft Defender for Office 365 is valuable, and we also use the DLP feature for email real-time detection."

More Microsoft Defender for Office 365 pros

Cons

"Cloudflare One is not very powerful, but for what we require, it is basic and sufficient."

"Operating and tuning the product is difficult."

"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."

"From a logging perspective, it is still a bit difficult to see exactly what users are being blocked with the current views."

"The software has automated alerts, but the automated alerts are not available in the mobile app."

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

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

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

More Cloudflare One cons

"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."

"The only drawback to this solution is that the firmware is frequently updated, and each update results in downtime."

"A room for improvement in Fortinet FortiMail is that it only has a hardware version. I also didn't find the solution scalable, so that's another area for improvement."

"The solution could improve by making the UI more user-friendly and increasing spam and threat detection capabilities."

"The logging information is sometimes not clear or easy to understand."

"There have been instances when Fortinet FortiMail rejects valid emails because some of the service partners of the customer have not been configured accurately, so the system considered valid mails as attacks to be quarantined, so aside from improving the filters, there should also be an improvement in the categorization of emails in the server."

"For example, there was malware in some emails that weren't detected in some of the Fortinet FortiMail sessions, but it should have been configured from my company's end to better catch scam emails, but overall, the solution is okay."

"The main area for improvement is the pricing."

More Fortinet FortiMail cons

"We noticed that from time to time, Microsoft's stability does have problems. Sometimes the service goes up and down. Sometimes they change without prior notice."

"Microsoft needs to broaden its global support presence by establishing teams of subject-matter experts in all regions."

"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 have moved features from one console to another. Things have been moved around in the interface and it takes me time to find where certain features are."

"I was looking for some advanced features, like if I would receive an email that contains a legitimate file type, but the content is malicious, how I can protect against that?"

"The only thing they should improve is the licensing model. They should stop changing it. A year ago, the five features I mentioned were included in one product. Now, three of them are bundled into one product, and you have to pay extra for the other two. I don't mind paying extra, but I don't want them to change it every year or every six months. I need to know what I'm looking at and not worry about it next year."

"Configuration at the mid-level could be improved for the support team."

"Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published."

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."

"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."

"The solution's pricing lacks transparency."

"The prices are slightly expensive."

"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."

"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."

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

"It is reasonable."

"Fortinet FortiMail is a little bit expensive."

"The solution is reasonably priced compared to one of its competitors."

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

"You need to pay additional fees for premium support."

"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."

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

More Fortinet FortiMail pricing and cost advice

"I know that the product is incredibly expensive."

"I was working in the government and it was too expensive for us to use our Microsoft products."

"The product is expensive."

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

"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."

"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."

"The product is very expensive."

"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."

More Microsoft Defender for Office 365 pricing and cost advice

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Top Industries

By visitors reading reviews

Construction Company

19%

Comms Service Provider

11%

Outsourcing Company

Financial Services Firm

Construction Company

Financial Services Firm

Manufacturing Company

Computer Software Company

11%

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

July 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