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Fortra's Clearswift Secure Email Gateway vs Mimecast Email and Collaboration Threat Protection comparison

 

Comparison Buyer's Guide

Executive Summary

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

Fortra's Clearswift Secure ...
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
0
Ranking in other categories
Email Security (36th)
Mimecast Email and Collabor...
Average Rating
8.0
Reviews Sentiment
5.9
Number of Reviews
39
Ranking in other categories
Email Archiving (2nd), Secure Web Gateways (SWG) (20th), Office 365 Protection (3rd), Secure Email Gateway (SEG) (4th)
 

Mindshare comparison

While both are Messaging and Collaboration solutions, they serve different purposes. Fortra's Clearswift Secure Email Gateway is designed for Email Security and holds a mindshare of 1.0%, up 0.7% compared to last year.
Mimecast Email and Collaboration Threat Protection, on the other hand, focuses on Secure Email Gateway (SEG), holds 16.6% mindshare, up 11.6% since last year.
Email Security Market Share Distribution
ProductMarket Share (%)
Fortra's Clearswift Secure Email Gateway1.0%
Microsoft Defender for Office 3659.1%
Proofpoint Email Protection8.1%
Other81.8%
Email Security
Secure Email Gateway (SEG) Market Share Distribution
ProductMarket Share (%)
Mimecast Advanced Email Security16.6%
Microsoft Defender for Office 36521.5%
Proofpoint Email Protection20.8%
Other41.099999999999994%
Secure Email Gateway (SEG)
 

Featured Reviews

PC
Systems Administrator at a financial services firm with 1,001-5,000 employees
Stable, but malware needs improvement and customer support is poor
They need to improve the malware in the product. I am not satisfied with Clearswift because of the lack of customer support. The support is poor, the supplier takes a lot of time and it's expensive. We have some issues here when I contact the supplier, it takes a lot of time for them to get back to us but there's no solution. I am now looking at Symantec as a possible alternative.
HS
Email Security Engineer at Logic Infosecurity
Experience high detection and user-friendly policies with reliable email security implementation
The system is not user-friendly because you have to create policies that are mapped in a dictionary. As an IT engineer, I understand how it works, but explaining it to another IT person can be difficult. Having more user-friendly dashboards would improve the work experience. In Mimecast Email Security, checking policies in the dictionary or gateway is very complicated, and not everyone understands this process. If you examine the Check Point portal, it's user-friendly with easily accessible tabs that anyone can explore. With Mimecast Email Security, making changes might impact existing mailboxes. The portal is complicated compared to Check Point's user-friendly interface.

Quotes from Members

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

Pros

"A stable solution."
"Ability to create your own content-filtering policies with relative ease."
"In terms of efficacy, Proofpoint is better than Mimecast, though it's a little difficult to manage."
"I have been satisfied with Mimecast Email Security as a good solution."
"The setup was easy."
"URL inspection works pretty well."
"Due to our specialized use case, that HIPAA dictionary really comes in handy."
"The solution's performance is good."
"The solution is pretty straightforward to use and easy to set up."
"In the current environment that the world is in, everyone is trying to hack everyone else, so Project+ definitely helps a lot there."
 

Cons

"FTP server and TRUST Manager functionality."
"Malware needs improvement."
"The price of the solution is expensive. It can improve by reducing the price."
"As a user, the user interface of the management console could be upgraded, for example."
"Mimecast needs to reduce the number of false positive emails; a big pain point for us."
"The detection rates are an area for improvement."
"Many of our users complain that the system is blocking too many attachments. It's a good practice from a security perspective, but our users think Mimecast is doing too much. It might be something we'll have to adjust."
"The price could be better, it should be reduced."
"The product's interface could be improved to be more user-friendly."
"The filtering needs more flexibility."
 

Pricing and Cost Advice

Information not available
"The product price is moderate. I rate the pricing a five out of ten."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"Compared to the other products in the market, it is neither cheap but nor very expensive. I would rate it somewhere in the middle, 5 out of 10."
"Two subscription options are currently offered: monthly and yearly. My suggestion is to opt for the yearly subscription as it can give some discount. The pricing isn't high as other cloud solutions are pricier than Microsoft's offerings."
"Its price is in the middle range. It is a structured licensing model where there are various components that you can add or choose to add or not."
"The licensing costs are per-user for the product that you get with them."
"It is a bit expensive."
"The price of Mimecast Mailbox Continuity is expensive."
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Top Industries

By visitors reading reviews
Computer Software Company
12%
Comms Service Provider
8%
Financial Services Firm
8%
Educational Organization
8%
Computer Software Company
13%
Financial Services Firm
8%
Manufacturing Company
6%
Comms Service Provider
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business19
Midsize Enterprise11
Large Enterprise13
 

Questions from the Community

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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?
There is room for improvement since new threats are emerging. Considering the availability of new features would be worthwhile. Mimecast Email Security is somewhat expensive compared to the competi...
 

Also Known As

No data available
Mimecast Email Security with Targeted Threat Protection, Mimecast Web Security, Mimecast Mailbox Continuity, Mimecast Advanced Email Security
 

Overview

 

Sample Customers

Information Not Available
Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Find out what your peers are saying about Microsoft, Proofpoint, Check Point Software Technologies and others in Email Security. Updated: January 2026.
882,103 professionals have used our research since 2012.