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Comparison Buyer's Guide

Executive SummaryUpdated on Mar 16, 2025

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
8.2
Reviews Sentiment
7.1
Number of Reviews
48
Ranking in other categories
Advanced Threat Protection (ATP) (1st), Microsoft Security Suite (11th)
Cloudflare One
Ranking in Email Security
11th
Average Rating
8.8
Reviews Sentiment
7.3
Number of Reviews
20
Ranking in other categories
Secure Web Gateways (SWG) (7th), Data Loss Prevention (DLP) (7th), Cloud Access Security Brokers (CASB) (7th), Distributed Denial-of-Service (DDoS) Protection (5th), Access Management (5th), Bot Management (3rd), ZTNA as a Service (3rd), ZTNA (2nd), Secure Access Service Edge (SASE) (6th), Remote Browser Isolation (RBI) (2nd)
Fortinet FortiMail
Ranking in Email Security
6th
Average Rating
8.6
Reviews Sentiment
7.0
Number of Reviews
63
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of April 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 13.1%, down from 19.0% compared to the previous year. The mindshare of Cloudflare One is 1.6%, up from 1.3% compared to the previous year. The mindshare of Fortinet FortiMail is 5.1%, down from 5.8% 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.
Carlos Alam Hernandez Baruch - PeerSpot reviewer
The solution enables seamless security management and fosters a learning environment
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. For the solution stopping us for e-learning, I appreciate the concept yet need more resources or courses in Mexico, preferably in Spanish. Certifications are easy, however, I require more real-world environments and instructors.
Nigus Machin Amare - PeerSpot reviewer
Offers advanced protection from email-based attacks and consistently blocks spam
The most valuable features are Fortinet FortiMail ( /products/fortinet-fortimail-reviews )'s ability to protect from advanced features of email-based attacks, including protection against ransomware and malware attacks. It is especially effective in blocking spam through standards like wrong source IP for email-based attacks. Its high scalability and stability, especially for financial institutions, are noteworthy.

Quotes from Members

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

Pros

"The basic features are okay and I'm satisfied with the Defender."
"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 most valuable feature of Microsoft Defender for Office 365 is its spam filter."
"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."
"I would say that 90% of the spam and phishing attack emails get blocked right off the bat."
"One of the best features of the tool is its capability to aggregate insights from different workloads, basically from the Office 365 and endpoints part."
"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."
"The deployment capability is a great feature."
"Cloudflare is by far the most effective solution that I have come across."
"Cloudflare DDoS is better than its competitors for its security, deployment, and scalability."
"Enables me to work from two locations."
"This solution is easy to understand and easy to configure."
"Cloudflare Zero Trust Platform removes the risk of exposing the applications to the public."
"The tool also offers good scalability, and the dashboard, along with real-time analytics, is very good."
"Cloudflare is simple to use."
"It will take the blow rather than our applications should an attack occur."
"The anti-spam features are valuable."
"The product's initial setup phase was very easy."
"Fortinet FortiMail has a lot of valuable features. It works great. It also has an antivirus feature. Support for Fortinet FortiMail was also great when my team wanted to block some geographic IPs, but couldn't figure out how to do it. The support team provided clear communication on how to resolve that issue. Another valuable feature of Fortinet FortiMail is SPAM filtering which tells you how many spammy emails you've received. Based on my current use cases, I'm happy with Fortinet FortiMail."
"Its performance is very good and it is stable."
"The most valuable feature of the solution is the tool's ability to prevent phishing attacks."
"After implementing FortiMail, the spam, and malicious emails we receive have significantly reduced, making it much simpler to manage."
"It is one of the most efficient solutions in our environment. We have more than nine hundred users. All of these users are protected by Fortinet FortiMail."
"The user quarantine feature in the solution is good...It is a stable solution."
 

Cons

"Sometimes, phishing emails manage to pass through the filter, so the system needs to enhance its phishing email detection capabilities."
"The certification training for Defender for 365 needs to be deeper and incorporate Sentinel. I took all the security courses except one, and Sentinel isn't included."
"Configuration at the mid-level could be improved for the support team."
"The GUI is sometimes slow to fetch the device report and could be improved."
"Microsoft Defender for Office 365's Mac functionality requires improvement to deliver the same level of protection found on Windows devices."
"In some situations, it has not been able to pick impersonated emails having no attachments. Technical support definitely has a scope for improvement."
"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."
"Microsoft should provide more documentation for users so they can self-educate. I would like to see more documentation for advanced security features."
"Cloudflare Zero Trust Platform needs to improve its documentation. It took time to do the implementation."
"The pricing is an area that can be improved. Pricing, as far as I recall, was the source of our problems."
"Our customers no longer use Cloudflare because its service is subpar."
"Our subscription plan for the solution has a limitation of bot signatures."
"The tool should provide on-premise versions. Currently, all versions are cloud-based."
"The free plan has limitations. For example, I can only set up three rules, and the application firewall is unavailable."
"The initial onboarding was causing us some confusion."
"For the topic of improvement, providing some training material is one of my suggestions."
"The solution could improve by making the UI more user-friendly and increasing spam and threat detection capabilities."
"There are features that other solutions have that this one is lacking, such as reporting options. I hope in future releases they advance their features list."
"Fortinet FortiMail could improve general user management. There are no password policies for users."
"The solution could be improved by providing a virtual machine facility with a complete set of options in the VM setup."
"The product could incorporate even more artificial intelligence to enhance the functionality, but it is a competetive and intelligent product as it."
"The solution doesn't scale easily."
"Improving the upgrade process, making it more user-friendly, and simplifying the management of hardware components could enhance the overall user experience and appeal of Fortinet's email security solution."
"I don't know if it is possible, but I would like to see Artificial Intelligence and machine learning introduced."
 

Pricing and Cost Advice

"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 license is expensive because the cost is based on the number of users."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"The pricing is normal. Considering its popularity, it's not overpriced."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
"The pricing has become expensive."
"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 prices are slightly expensive."
"The solution is not that 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."
"The pricing is somewhere in the middle. I would rate the pricing a seven out of ten."
"Cloudflare Zero Trust Platform's pricing is good."
"The solution's pricing lacks transparency."
"We paid approximately $30,000 for the solution. It is less expensive than some other solutions. We have one license that carries all the features that we wanted."
"FortiMail is not cheap."
"It is an expensive product."
"Pricing is straight-forward and renewable without complicated pricing structures."
"There is a license required for this solution."
"The licensing model for this solution is better because it is based on the box and not the number of users."
"The annual cost is $55,000."
"The solution is reasonably priced compared to one of its competitors."
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
9%
Manufacturing Company
8%
Government
6%
Computer Software Company
16%
Financial Services Firm
10%
Comms Service Provider
9%
Manufacturing Company
6%
Educational Organization
46%
Computer Software Company
9%
Financial Services Firm
5%
Government
4%
 

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 do you like most about Cloudflare Access?
The tool also offers good scalability, and the dashboard, along with real-time analytics, is very good.
What is your experience regarding pricing and costs for Cloudflare Access?
The price of Cloudflare Access is the same as compared to Akamai, but I get better performance from Cloudflare. My co...
What needs improvement with Cloudflare Access?
Cloudflare Access has strong integration with Microsoft, among other platforms. However, when it comes to Kaspersky, ...
What needs improvement with Fortinet FortiMail?
Detailed documentation regarding deployment options and configuration would be beneficial. Providing comprehensive do...
 

Also Known As

MS Defender for Office 365
Cloudflare Area 1 Email Security, Cloudflare Bot Management, Cloudflare Gateway, Cloudflare Zero Trust Platform, Cloudflare DDoS, Cloudflare SASE & SSE Platform
FortiMail
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
23andMe
Magromer Cueros y Pieles S.A.
Find out what your peers are saying about Cloudflare One vs. Fortinet FortiMail and other solutions. Updated: April 2025.
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