Try our new research platform with insights from 80,000+ expert users

Fortra's Clearswift Secure Email Gateway vs Mimecast Email Security 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 (41st)
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. Fortra's Clearswift Secure Email Gateway is designed for Email Security and holds a mindshare of 1.0%, up 0.5% 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 (%)
Fortra's Clearswift Secure Email Gateway1.0%
Microsoft Defender for Office 36511.4%
Proofpoint Email Protection8.2%
Other79.4%
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

PC
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.
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.

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."
"We like the content filtering and secure messaging features."
"We like Mimecast's spam filtering. The email signature feature is also a big plus for our users."
"Mimecast certainly helped my customers reduce phishing emails."
"The solution offers good technical support."
"What I like about the integration is that it is directly into Microsoft 365, users can use their Microsoft 365 credentials to log into the portal and access their mail."
"The solution's performance is good."
"I recommend Mimecast based on customer requirements and budget."
"Its administration console is very easy to use. The administration console is absolutely important because you interact with the platform through it."
 

Cons

"FTP server and TRUST Manager functionality."
"Malware needs improvement."
"The product's interface could be improved to be more user-friendly."
"The system is not user-friendly because you have to create policies that are mapped in a dictionary."
"The reaction time between a new threat being identified and Mimecast picking it up needs to be narrowed a bit."
"The feature that should be included is to remove the block on the encrypted files."
"They could provide a unified licensing model, including all the security features."
"The solution is very expensive."
"The solution's console interface was recently changed for the admins, but the previous one was much better because we could open tabs on it."
"I'd like to have better support from the product in the future."
 

Pricing and Cost Advice

Information not available
"We pay monthly fees to our provider."
"The product has good pricing in terms of return on investment."
"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."
"The licensing costs are per-user for the product that you get with them."
"For what it is, the product is overpriced."
"I'm always going to say the price needs to be lower, but it's reasonable."
"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."
report
Use our free recommendation engine to learn which Email Security solutions are best for your needs.
870,697 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
16%
Government
10%
Comms Service Provider
10%
Financial Services Firm
10%
Computer Software Company
14%
Financial Services Firm
7%
Manufacturing Company
6%
Comms Service Provider
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business16
Midsize Enterprise7
Large Enterprise11
 

Questions from the Community

Ask a question
Earn 20 points
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

No data available
Mimecast Email Security with Targeted Threat Protection
 

Overview

 

Sample Customers

Information Not Available
Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Find out what your peers are saying about Microsoft, Abnormal AI, Proofpoint and others in Email Security. Updated: September 2025.
870,697 professionals have used our research since 2012.