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Mimecast Email Security vs Trustwave Secure Email Gateway comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 5, 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

Mimecast Email Security
Ranking in Secure Email Gateway (SEG)
4th
Average Rating
8.0
Reviews Sentiment
6.1
Number of Reviews
31
Ranking in other categories
Office 365 Protection (3rd)
Trustwave Secure Email Gateway
Ranking in Secure Email Gateway (SEG)
13th
Average Rating
7.0
Reviews Sentiment
7.0
Number of Reviews
2
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2025, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Email Security is 12.5%, down from 15.0% compared to the previous year. The mindshare of Trustwave Secure Email Gateway is 0.8%, up from 0.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Market Share Distribution
ProductMarket Share (%)
Mimecast Email Security12.5%
Trustwave Secure Email Gateway0.8%
Other86.7%
Secure Email Gateway (SEG)
 

Featured Reviews

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.
FA
Offers clear vision on the clear side of what is being blocked and easy to use but a bit old-fashioned GUI
I would rate my experience with the initial setup a four out of ten when one is difficult, and ten is easy. It's difficult initially since it's an on-premise solution. So it's a bit difficult. So the initial assessment took a few days, and then the deployment was a couple of days. It is on-prem. That is also one of the improvements you need to make on the cloud. Most of the people like things to be on the cloud. You don't have the burden of setting up things on-premise.

Quotes from Members

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

Pros

"It's good, it keeps the spam out."
"Email security is the most valuable feature of the solution."
"The product is good. To date, we have not faced any challenges."
"In the current environment that the world is in, everyone is trying to hack everyone else, so Project+ definitely helps a lot there."
"Based on overall experience, Mimecast Email Security is the best solution for traditional gateways."
"The product's most valuable features are impersonation protection and phishing countermeasures."
"The most valuable feature is the DMARC Analyzer."
"The setup was easy."
"The product's most valuable features are spam protection and artificial intelligence."
"I like that it doesn't hold emails for any reason; it sends out notifications to the user as well as administrators. So we have a clear vision on the clear side of what is being blocked and in time as well."
 

Cons

"The filtering needs more flexibility."
"Its pricing can be improved. It is a bit expensive."
"External security features need improvement."
"The feature that should be included is to remove the block on the encrypted files."
"The reaction time between a new threat being identified and Mimecast picking it up needs to be narrowed a bit."
"They could provide a unified licensing model, including all the security features."
"While it's quick and easy, the initial setup could be more user-friendly."
"Mimecast needs to reduce the number of false positive emails; a big pain point for us."
"The technical support services and stability need improvement as well."
"There is room for improvement in GUI because it is a bit old-fashioned."
 

Pricing and Cost Advice

"The customers can select the license packages as per their requirements."
"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the pricing a 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."
"It is a bit expensive."
"The product price is moderate. I rate the pricing a five out of ten."
"The solution is expensive."
"I'm always going to say the price needs to be lower, but it's reasonable."
"It is a cost-effective product."
"The pricing is in the middle. Compared to other products, it should be five out of ten, where one is cheap and ten is expensive."
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868,706 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
15%
Financial Services Firm
7%
Manufacturing Company
7%
Comms Service Provider
6%
No data available
 

Company Size

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

Questions from the Community

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.
What do you like most about Trustwave Secure Email Gateway?
I like that it doesn't hold emails for any reason; it sends out notifications to the user as well as administrators. So we have a clear vision on the clear side of what is being blocked and in time...
What is your experience regarding pricing and costs for Trustwave Secure Email Gateway?
The pricing is in the middle. Compared to other products, it should be five out of ten, where one is cheap and ten is expensive.
What needs improvement with Trustwave Secure Email Gateway?
There is room for improvement in GUI because it is a bit old-fashioned. Moreover, it can add more advanced features compared to a competitor like Mimecast.
 

Also Known As

Mimecast Email Security with Targeted Threat Protection
Trustwave SEG
 

Overview

 

Sample Customers

Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Information Not Available
Find out what your peers are saying about Mimecast Email Security vs. Trustwave Secure Email Gateway and other solutions. Updated: September 2025.
868,706 professionals have used our research since 2012.