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Heimdal Email Security vs Mimecast Advanced 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

Heimdal Email Security
Average Rating
9.0
Reviews Sentiment
7.9
Number of Reviews
1
Ranking in other categories
Email Security (66th), Fraud Detection and Prevention (61st)
Mimecast Advanced Email Sec...
Average Rating
8.0
Reviews Sentiment
5.9
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. Heimdal Email Security is designed for Email Security and holds a mindshare of 0.3%, up 0.2% compared to last year.
Mimecast Advanced Email Security, on the other hand, focuses on Secure Email Gateway (SEG), holds 16.5% mindshare, up 11.6% since last year.
Email Security Market Share Distribution
ProductMarket Share (%)
Heimdal Email Security0.3%
Microsoft Defender for Office 3659.1%
Proofpoint Email Protection8.1%
Other82.5%
Email Security
Secure Email Gateway (SEG) Market Share Distribution
ProductMarket Share (%)
Mimecast Advanced Email Security16.5%
Microsoft Defender for Office 36521.4%
Proofpoint Email Protection20.9%
Other41.2%
Secure Email Gateway (SEG)
 

Featured Reviews

Melvin Ong - PeerSpot reviewer
Country Manager at PT Symcaw Solutions Indonesia
Straightforward to set up, reliable, and offers good functionality
We primarily use the solution for email security and general email management.  It's improved our productivity.  The solution works well overall. The functionality is very good.  The setup process is easy.  It is stable and reliable. It's scalable.  I don't have any specific areas that need…
HS
Email Security Engineer at Logic Infosecurity
Experience high detection and user-friendly policies with reliable email security implementation
The system is not user-friendly because you have to create policies that are mapped in a dictionary. As an IT engineer, I understand how it works, but explaining it to another IT person can be difficult. Having more user-friendly dashboards would improve the work experience. In Mimecast Email Security, checking policies in the dictionary or gateway is very complicated, and not everyone understands this process. If you examine the Check Point portal, it's user-friendly with easily accessible tabs that anyone can explore. With Mimecast Email Security, making changes might impact existing mailboxes. The portal is complicated compared to Check Point's user-friendly interface.

Quotes from Members

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

Pros

"It is stable and reliable."
"The setup was easy."
"I recommend Mimecast based on customer requirements and budget."
"The solution is scalable."
"Mimecast certainly helped my customers reduce phishing emails."
"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."
"I have been satisfied with Mimecast Email Security as a good solution."
"The reviewer gave Mimecast Email Security a rating of 10 out of 10."
"It's good, it keeps the spam out."
 

Cons

"The solution could be less expensive."
"I'd like to have better support from the product in the future."
"Lately, Mimecast's outbound mail servers have been regularly blocklisted by spam filters. That didn't happen a few years back, but it seems to be a more frequent problem these days. When a server is blocklisted, it means all of my outgoing mail ends up in the recipient's junk mail. That affects my reputation and business confidence."
"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."
"Mimecast Email Security is somewhat expensive compared to the competition in the Indian market, and the local presence is lacking as they do not have a local representative currently."
"The reaction time between a new threat being identified and Mimecast picking it up needs to be narrowed a bit."
"Their support should be improved. They are notorious for sending you to knowledge-based articles rather than actually talking to you, but that is, unfortunately, kind of becoming a trend with everything. In terms of features, I haven't had any complaints. However, I don't like the fact they moved to a paid training subscription model. They used to have a lot of free webinars for training, but they have started to charge for them in the past year."
"The solution should include more AI features instead of Mimecast's more general static configuration tooling."
"External security features need improvement."
 

Pricing and Cost Advice

Information not available
"I'm always going to say the price needs to be lower, but it's reasonable."
"The licensing costs are per-user for the product that you get with them."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"The solution is expensive."
"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's an expensive solution."
"It is a bit expensive."
"The product has good pricing in terms of return on investment."
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Top Industries

By visitors reading reviews
No data available
Computer Software Company
14%
Financial Services Firm
8%
Manufacturing Company
6%
Comms Service Provider
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business17
Midsize Enterprise7
Large Enterprise11
 

Questions from the Community

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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?
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...
 

Also Known As

MailSentry
Mimecast Email Security with Targeted Threat Protection
 

Overview

 

Sample Customers

Brother, Symbion, CPH West
Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Find out what your peers are saying about Microsoft, Proofpoint, Check Point Software Technologies and others in Email Security. Updated: January 2026.
881,733 professionals have used our research since 2012.