No more typing reviews! Try our Samantha, our new voice AI agent.

Mimecast Advanced Email Security vs Trustwave Secure Email Gateway comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jun 2, 2026

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 Advanced Email Sec...
Ranking in Secure Email Gateway (SEG)
3rd
Average Rating
8.0
Reviews Sentiment
5.9
Number of Reviews
44
Ranking in other categories
Email Archiving (2nd), Email Security (4th), Office 365 Protection (2nd)
Trustwave Secure Email Gateway
Ranking in Secure Email Gateway (SEG)
15th
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 August 2026, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Advanced Email Security is 14.6%, up from 12.6% compared to the previous year. The mindshare of Trustwave Secure Email Gateway is 1.5%, up from 0.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Mindshare Distribution
ProductMindshare (%)
Mimecast Advanced Email Security14.6%
Trustwave Secure Email Gateway1.5%
Other83.9%
Secure Email Gateway (SEG)
 

Featured Reviews

Avinash Mishra - PeerSpot reviewer
Manager - EUC at Finthrive
Advanced email filtering has blocked massive spam volumes and prevents unauthorized data leaks
Improvements for Mimecast Advanced Email Security include enhancing the user interface and accessibility, particularly regarding admin capabilities to add or modify user accounts. Streamlining this could improve overall usability and security management for users. Reporting is another area needing improvement in Mimecast Advanced Email Security, as the reports provided are not very easy to decipher. With artificial intelligence being integrated into various tools including Mimecast Advanced Email Security, I believe there is potential to enhance functionality, enabling users to ask specific questions and retrieve concise answers instead of overwhelming data. I choose a nine for Mimecast Advanced Email Security because improvements such as better user interface and artificial intelligence integration features would greatly enhance its usability. While no tool is perfect, these adjustments could greatly elevate Mimecast Advanced Email Security's capabilities.
FA
Cloud & Systems Admin at Service Management Group, Inc.
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

"The Large File Send feature comes in handy when you have to send fairly large attachments."
"Mimecast is pretty good, even if you're on Office 365."
"We're now certain business-critical mail is perfectly protected in multiple ways."
"The solution offers good technical support."
"The piece that is most valuable from the Mimecast standpoint will be the sandboxing feature."
"Mimecast certainly helped my customers reduce phishing emails."
"In the current environment that the world is in, everyone is trying to hack everyone else, so Project+ definitely helps a lot there."
"I have always found Mimecast to be very responsive; for example, if we see something come through, they address it and it helps to sort out the issues."
"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 attachment scanning feature doesn't work properly."
"The price of the solution is expensive. It can improve by reducing the price."
"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 feature that should be included is to remove the block on the encrypted files."
"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."
"The solution is complex and not easy to use."
"From an administrative point of view, Mimecast is a little bit cumbersome and difficult. It's not something that the end-user can easily find navigate themselves."
"The interface and the documentation could be improved. They can also include some more training resources and content like video. While setting things up, I had to search for the information quite a bit. It took me time to find the correct way to do something. The information is there, but it is sort of all over the place. They can create a better help knowledge base or help portal. It retains your email for 45 days. They can maybe increase this duration."
"There is room for improvement in GUI because it is a bit old-fashioned."
"The technical support services and stability need improvement as well."
 

Pricing and Cost Advice

"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."
"It is a bit expensive."
"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."
"The solution is expensive."
"The price of Mimecast Mailbox Continuity is expensive."
"The product has good pricing in terms of return on investment."
"It's an expensive solution."
"I'm always going to say the price needs to be lower, but it's reasonable."
"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."
"It is a cost-effective product."
report
Use our free recommendation engine to learn which Secure Email Gateway (SEG) solutions are best for your needs.
909,725 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
10%
Financial Services Firm
9%
Construction Company
8%
Outsourcing Company
8%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business19
Midsize Enterprise12
Large Enterprise20
No data available
 

Questions from the Community

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...
Ask a question
Earn 20 points
 

Also Known As

Mimecast Email Security with Targeted Threat Protection, Mimecast Web Security, Mimecast Mailbox Continuity, Email and Collaboration Threat Protection
Trustwave SEG
 

Overview

 

Sample Customers

Hewlett-Packard Company (HP), Cushman and Wakefield, PIB Group, Swissport
Information Not Available
Find out what your peers are saying about Mimecast Advanced Email Security vs. Trustwave Secure Email Gateway and other solutions. Updated: June 2026.
909,725 professionals have used our research since 2012.