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

Mimecast Advanced Email Security vs Retarus Email Security 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), Secure Web Gateways (SWG) (10th), Office 365 Protection (2nd)
Retarus Email Security
Ranking in Secure Email Gateway (SEG)
16th
Average Rating
8.0
Reviews Sentiment
5.6
Number of Reviews
1
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2026, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Advanced Email Security is 15.2%, up from 12.0% compared to the previous year. The mindshare of Retarus Email Security is 1.1%, up from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Mindshare Distribution
ProductMindshare (%)
Mimecast Advanced Email Security15.2%
Retarus Email Security1.1%
Other83.7%
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.
WAKKAS AHMAD - PeerSpot reviewer
Security Consultant at Mahle
Provides valuable reports that make it easy to take action
Our primary use case for this solution is protecting emails This solution has helped our organization by protecting our emails from various threats. It helped us get customized reports on all of the emails we received on the user side and other data. The feature I found most valuable was getting…

Quotes from Members

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

Pros

"The solution is pretty straightforward to use and easy to set up."
"We like the content filtering and secure messaging features."
"Mimecast has some good support services in place."
"The initial setup is easy."
"URL inspection works pretty well."
"The positive impact of Mimecast Advanced Email Security on our organization is evident in how it has drastically reduced spam emails and improved our data security."
"The solution is scalable."
"It's good, it keeps the spam out, and it does a really good job at not allowing threats through."
"The feature I found most valuable was getting details on the emails, being alerted once those emails got a bad reputation, and then being able to take action on those emails."
 

Cons

"Mimecast need to ensure that the body text format is correctly handled and that images are properly embedded in the body text."
"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."
"This solution can be frustrating. It blocks many things that should be going through."
"The price could be better, it should be reduced."
"The filtering needs more flexibility."
"The price of the solution is expensive. It can improve by reducing the price."
"We discussed the phishing aspect, the DNS system, and the key rotation."
"They could provide a unified licensing model, including all the security features."
"This solution needs to improve the area of GUI as well as dashboards because they are very poor in terms of the current email security solution."
 

Pricing and Cost Advice

"The product price is moderate. I rate the pricing a five out of ten."
"I'm always going to say the price needs to be lower, but it's reasonable."
"The solution is expensive."
"The customers can select the license packages as per their requirements."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"It is a bit expensive."
"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's an expensive solution."
Information not available
report
Use our free recommendation engine to learn which Secure Email Gateway (SEG) solutions are best for your needs.
904,836 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
11%
Financial Services Firm
9%
Construction Company
8%
Outsourcing Company
7%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business19
Midsize Enterprise12
Large Enterprise18
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
No data available
 

Overview

 

Sample Customers

Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Information Not Available
Find out what your peers are saying about Proofpoint, Microsoft, Mimecast and others in Secure Email Gateway (SEG). Updated: June 2026.
904,836 professionals have used our research since 2012.