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Fortinet FortiMail vs Mimecast Email Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jul 27, 2025

Review summaries and opinions

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

ROI

Sentiment score
7.1
Fortinet FortiMail enhances email safety, reduces costs, and improves efficiency, earning user trust with its cost-effective features.
Sentiment score
6.0
Mimecast Email Security effectively prevents phishing, enhancing security and providing significant protection despite challenges in quantifying ROI.
It offers cost savings compared to Cisco, which was very expensive.
There is definitely a return on investment when using Mimecast, as it blocks phishing emails, reducing the risk of significant financial losses.
 

Customer Service

Sentiment score
6.3
Fortinet FortiMail's technical support is highly rated for quick, expert assistance, though some entry-level issues exist.
Sentiment score
6.0
Mimecast Email Security's customer service is mixed, with responsiveness praised by some, but issues with waiting times noted by others.
I have direct communication with Kenyan system engineers and local support in Ethiopia, enabling good support.
Fortinet's technical support offers high-quality support.
Support personnel are hesitant to engage in remote sessions, preferring to share documentation via email.
Mimecast technical support is generally quite good.
I would rate my experience with technical support of Mimecast Email Security between seven and eight out of ten for their support.
 

Scalability Issues

Sentiment score
7.2
Fortinet FortiMail is scalable, effective for medium to enterprise businesses, but faces hardware and licensing limitations.
Sentiment score
7.2
Mimecast Email Security is a scalable SaaS solution, praised for flexibility and effectiveness across various organization sizes and industries.
If Mimecast Email Security introduces API solutions, it will dominate the market.
 

Stability Issues

Sentiment score
8.3
Fortinet FortiMail is stable and reliable, offering strong performance, seamless integration, and high user satisfaction with minimal issues.
Sentiment score
7.5
Mimecast Email Security is generally stable and reliable, with rare bugs, occasional minor issues, and minimal downtime reported.
This stability is consistent across Fortinet products, including FortiGate firewall.
They confirm it's a good solution where only one or two rare emails get through, while the rest are properly blocked without any issues.
 

Room For Improvement

Fortinet FortiMail requires improvements in management, cost, integration, reporting, setup, documentation, content security, and user interface.
Mimecast Email Security requires pricing, detection, user interface improvements, better support, and enhanced AI integration for smoother operations.
The transition from on-premises devices to virtual appliances may be necessary as more organizations migrate email services to the cloud.
Providing comprehensive documentation on how to deploy and configure would improve the solution.
The area that could use some improvement in Fortinet FortiMail is the integration process.
A lot of emails were missed despite being known samples.
We discussed the phishing aspect, the DNS system, and the key rotation.
Mimecast Email Security can be improved by adding some API integrations.
 

Setup Cost

Fortinet FortiMail pricing is capacity-based, seen as cost-effective by some, yet expensive due to features and stability.
Mimecast Email Security offers comprehensive features but is considered premium, with variable pricing flexibility and additional support costs.
Fortinet FortiMail is considered overpriced by Indian rupee standards.
The pricing is higher for Mimecast, particularly for the Indian market, where it is considered expensive.
 

Valuable Features

Fortinet FortiMail offers user-friendly, scalable email security with anti-spam, antivirus, phishing protection, and seamless Fortinet product integration.
Mimecast Email Security offers strong threat protection, seamless Microsoft 365 integration, and user-friendly features for comprehensive email threat mitigation.
Its threat detection capabilities have been beneficial.
The most valuable features are Fortinet FortiMail's ability to protect from advanced features of email-based attacks, including protection against ransomware and malware attacks.
Fortinet FortiMail offers capabilities like settings for mail delivery, mail filtering, spam controls, and email bursting prevention.
One of the most useful features is the threat remediation module, which can be used to remove malicious emails that may have been delivered or manually remove them.
A distinct advantage of Mimecast is its ability to block phishing and impostor attacks, which are significant threats currently.
Mimecast Email Security includes the best gateway solution across all Cisco, Trend Micro, and other solutions.
 

Categories and Ranking

Fortinet FortiMail
Average Rating
8.6
Reviews Sentiment
6.9
Number of Reviews
65
Ranking in other categories
Email Security (6th)
Mimecast Email Security
Average Rating
8.0
Reviews Sentiment
6.1
Number of Reviews
31
Ranking in other categories
Office 365 Protection (3rd), Secure Email Gateway (SEG) (4th)
 

Mindshare comparison

While both are Messaging and Collaboration solutions, they serve different purposes. Fortinet FortiMail is designed for Email Security and holds a mindshare of 4.0%, down 5.8% compared to last year.
Mimecast Email Security, on the other hand, focuses on Secure Email Gateway (SEG), holds 12.5% mindshare, down 15.0% since last year.
Email Security Market Share Distribution
ProductMarket Share (%)
Fortinet FortiMail4.0%
Microsoft Defender for Office 36511.4%
Proofpoint Email Protection8.2%
Other76.4%
Email Security
Secure Email Gateway (SEG) Market Share Distribution
ProductMarket Share (%)
Mimecast Email Security12.5%
Microsoft Defender for Office 36527.6%
Proofpoint Email Protection21.0%
Other38.9%
Secure Email Gateway (SEG)
 

Featured Reviews

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.
Frank Rawson - PeerSpot reviewer
It gives clients peace of mind and helps them educate their users about threats
A few years ago, our team found the implementation to be somewhat challenging. It has gotten easier as we've grown more experienced. The difficulty depends on the expertise of the person doing it. I don't work with Mimecast every day, so it might be more difficult for me than it is for one of my techs who regularly does Mimecast implementations. It requires some specific in-depth product knowledge and an understanding of email solutions. The deployment time varies. In South Africa, it depends on who you use to deploy it. If you use one of Mimecast's local partners, it can take up to two weeks because of their process. However, it's only about four to eight hours of work. After deployment, there isn't much maintenance aside from supporting and educating your customers. Users require constant education on how to use the Mimecast client and release an email that has been blocked.
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Top Industries

By visitors reading reviews
Computer Software Company
13%
Financial Services Firm
9%
Manufacturing Company
7%
Comms Service Provider
6%
Computer Software Company
14%
Financial Services Firm
7%
Manufacturing Company
7%
Comms Service Provider
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business31
Midsize Enterprise22
Large Enterprise14
By reviewers
Company SizeCount
Small Business16
Midsize Enterprise7
Large Enterprise11
 

Questions from the Community

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 academic pricing is required, but it may not be available for security products like...
What needs improvement with Fortinet FortiMail?
It can be somewhat difficult to prepare precise or very deep rules to improve security, though the product is very good.
What do you like most about Mimecast Email Security with Targeted Threat Protection?
The interface of this solution is very easy to navigate and user-friendly. There is no delivery in email and other communications, making it reliable. The configuration is relatively easy.
What needs improvement with Mimecast Email Security with Targeted Threat Protection?
Mimecast Email Security can be improved by adding some API integrations. Instead of remaining a traditional gateway, Mimecast Email Security needs to provide API solutions similar to Check Point.
 

Also Known As

FortiMail
Mimecast Email Security with Targeted Threat Protection
 

Overview

 

Sample Customers

Magromer Cueros y Pieles S.A.
Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Find out what your peers are saying about Fortinet FortiMail vs. Mimecast Email Security and other solutions. Updated: January 2024.
869,952 professionals have used our research since 2012.