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Fortinet FortiMail vs Libraesva Email Security 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...
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Ranking in Email Security
1st
Average Rating
8.4
Reviews Sentiment
7.0
Number of Reviews
52
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (2nd), Microsoft Security Suite (10th), Secure Email Gateway (SEG) (1st)
Fortinet FortiMail
Ranking in Email Security
7th
Average Rating
8.6
Reviews Sentiment
7.0
Number of Reviews
64
Ranking in other categories
No ranking in other categories
Libraesva Email Security
Ranking in Email Security
31st
Average Rating
8.6
Reviews Sentiment
7.9
Number of Reviews
2
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 12.3%, down from 16.9% compared to the previous year. The mindshare of Fortinet FortiMail is 4.6%, down from 6.0% compared to the previous year. The mindshare of Libraesva Email Security is 0.5%, up from 0.3% 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.
LucaTurano - PeerSpot reviewer
Handles security, malware and spam of email systems
We use Email Security Gateway on email systems for handling security, malware, and spam.  The solution is easier to manage than FortiMail. You can implement policies easily.  The solution does not always effectively identify zero day spam and phishing, but once reported the correction occurs very…

Quotes from Members

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

Pros

"The ability to respond to threats if very important."
"The two main features that prove most beneficial for us are URL scanning and attachment scanning."
"The most valuable feature of Microsoft Defender for Office 365 is the ease of use."
"We use Microsoft Defender for its ability to integrate with existing business technologies, which is beneficial for protecting business areas."
"Scalability-wise, I do not think there are any issues so far."
"Since we have started using the solution, there have been fewer compromises."
"The good part is that you don't have to configure it, which is very convenient."
"Safe attachments, safe links, policies, and the ability to protect from zero-day threats are the most valuable features."
"Fortinet’s support services are good."
"For me, Fortinet FortiMail is the best solution I have ever tried."
"The product helps users handle security challenges as it offers prefiltering options and does relatively good incident reporting."
"FortiMail is a stable product."
"The anti-spam feature is very valuable."
"The anti-spam functionality is good and works well."
"After implementing FortiMail, the spam, and malicious emails we receive have significantly reduced, making it much simpler to manage."
"Clean user interface and good sandbox."
"It helps reduce spam and phishing attacks."
"The solution is easier to manage than FortiMail. You can implement policies easily."
 

Cons

"Microsoft sometimes has downtime, and we'll get several incidents coming in back to back. We have a huge backlog of notifications, many of which may be false positives. However, there might be serious alerts, so we can't risk dismissing all of them at once."
"We need to be able to whitelist data at the backend."
"One area for improvement is integration. For example, when it comes to external SaaS platforms, we were not able to get a lot of information on integrations with such apps for security and authentication."
"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."
"You should be able to deploy Defender for every subscription without the need to add servers."
"Microsoft Defender for Office 365 should be more proactive."
"In one of the reports I can get the exact place where a vulnerable file resides. But for that, I need to explicitly go into the device and check. If they could include that file part in the report, without my having to go to the device itself, that would help."
"Too many false positives and lacks an accurate capability to detect malicious SharePoint sites."
"The only drawback to this solution is that the firmware is frequently updated, and each update results in downtime."
"I have little to say about possible improvements, but the configuration for content blocking could be better. So, for example, if the email includes the line "You have a Bitcoin", I would like it to be easier to block it before it enters an inbox. Fortinet could maybe offer better or simpler help on how to do this properly."
"The solution's pricing could be improved."
"They should add a lot of threat-intelligence feeds from different sources - not only from one source (FortiGuard)."
"Sometimes, the tool flags legitimate incoming traffic as spam."
"The product should work on licensing and provide more detail once the license is selected for the customer."
"Header inspection and containerization, like on-prem premises sandboxing, need enhancement."
"Limited ability to upgrade hardware may lead to some performance issues that might otherwise be improved."
"The solution does not always effectively identify zero day spam and phishing, but once reported the correction occurs very quickly."
"Its pricing could be affordable."
 

Pricing and Cost Advice

"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 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 is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
"It's a user-base subscription."
"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."
"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."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
"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."
"Fortinet FortiMail has an annual license agreement."
"Compared to its competitors, Fortinet's products are available at a higher price range."
"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."
"The licensing model for this solution is better because it is based on the box and not the number of users."
"The solution is quite pricey compared to other competitors in the market."
"There is a license required for this solution and it is on an annual basis. I am satisfied with the price."
"It is a fairly priced product, considering what it does. The product offers good value for the money users spend on it."
"Email Security Gateway's pricing is good."
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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
20%
Computer Software Company
12%
Financial Services Firm
9%
Government
6%
Comms Service Provider
25%
Computer Software Company
15%
Manufacturing Company
11%
University
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

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?
Microsoft is quite affordable with a lot of features available for any size organization.
What needs improvement with Microsoft Defender for Office 365?
Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS recor...
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. ...
 

Also Known As

MS Defender for Office 365
FortiMail
No data available
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Magromer Cueros y Pieles S.A.
Information Not Available
Find out what your peers are saying about Fortinet FortiMail vs. Libraesva Email Security and other solutions. Updated: June 2025.
860,592 professionals have used our research since 2012.