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Mimecast Advanced Email Security vs Webroot Advanced Email Encryption powered by Zix comparison

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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
8.2
Reviews Sentiment
5.9
Number of Reviews
49
Ranking in other categories
Email Archiving (1st), Email Security (4th), Office 365 Protection (2nd)
Webroot Advanced Email Encr...
Ranking in Secure Email Gateway (SEG)
15th
Average Rating
7.0
Number of Reviews
1
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2026, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Advanced Email Security is 14.1%, up from 12.7% compared to the previous year. The mindshare of Webroot Advanced Email Encryption powered by Zix is 1.5%, up from 0.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Mindshare Distribution
ProductMindshare (%)
Mimecast Advanced Email Security14.1%
Webroot Advanced Email Encryption powered by Zix1.5%
Other84.4%
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.
John Zupancic - PeerSpot reviewer
Vice President / Branch Manager / Senior Technician at Aperion Information Technologies, Inc.
Inexpensive, with good email security, but the technical support could be improved
We don't have as many problems with email security. They have some areas that could be improved. For example, we also use this solution for email encryption, which was clunky and could be improved, but the email security itself has been excellent. The web interface works well but the Outlook plug-in has been problematic. We've had to uninstall/reinstall it. On some Outlook clients (including mine), it causes Outlook to stop responding. I disabled the Outlook plug-in and only use the web interface.

Quotes from Members

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

Pros

"My advice to those considering this product would be to go for it."
"If you want the ease of use, then Mimecast, or at least a cloud solution, is the way to go."
"The initial setup is easy."
"It's good, it keeps the spam out."
"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."
"Mimecast Advanced Email Security proves to be a useful tool, allowing me as security personnel to work in a more peaceful manner."
"The solution's performance is good."
"Mimecast Mailbox Continuity helps companies continue to move."
"They do a better job of determining what's real and what's not than most of the other solutions we have tried, and it's been very painless to use."
 

Cons

"Mimecast needs to reduce the number of false positive emails; a big pain point for us."
"Mimecast Advanced Email Security is adequate, but it has remained the same since the last two years with not much research and development."
"Mimecast Advanced Email Security needs to improve in this area because they are only focusing on a particular set of problems which is on email and human risk, whereas companies that need a slightly bigger picture will look elsewhere."
"Certainly, the primary area needing improvement is Mimecast's customer support. Our experience as Mimecast customers has been less than satisfactory. Even when raising a priority ticket, the response time is unacceptably long, often taking around five to six hours. This level of service is disappointing. Additionally, there have been recurring service disruptions in the UK region, leading to extended email delays due to various service issues. This year alone, we've encountered such problems on approximately four occasions."
"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."
"I did have a problem with Mimecast. That is why I was looking for an alternative solution because their sender IP address gets poorly rated by Microsoft."
"The solution is very expensive."
"The feature that should be included is to remove the block on the encrypted files."
"Because the encryption has been very clunky, I would rate Zix Email Encryption a seven out of ten."
"They have some areas that could be improved. For example, we also use this solution for email encryption, which was clunky and could be improved, but the email security itself has been excellent."
 

Pricing and Cost Advice

"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."
"For what it is, the product is overpriced."
"The price of Mimecast Mailbox Continuity is expensive."
"I'm always going to say the price needs to be lower, but it's reasonable."
"It's an expensive solution."
"It is a bit expensive."
"The product price is moderate. I rate the pricing a five out of ten."
"In terms of pricing, I believe they provide excellent value."
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Top Industries

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

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business23
Midsize Enterprise12
Large Enterprise23
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...
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Also Known As

Mimecast Email Security with Targeted Threat Protection, Mimecast Web Security, Mimecast Mailbox Continuity, Email and Collaboration Threat Protection
Zix Email Encryption, ZixEncrypt
 

Overview

 

Sample Customers

Hewlett-Packard Company (HP), Cushman and Wakefield, PIB Group, Swissport
Erie County of Pennsylvania’s Human Services Department, Justice Federal Credit Union, STAR Financial Group, Chisago County, Minn., The National Banks of Central Texas, Kentucky Retirement Systems (KRS), Frankfort, Ky, Athletico Physical Therapy, District of Columbia Retirement Board (DCRB), CIBM Bank
Find out what your peers are saying about Proofpoint, Microsoft, Mimecast and others in Secure Email Gateway (SEG). Updated: October 2026.
919,894 professionals have used our research since 2012.