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Mimecast Advanced Email Security vs Sublime 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

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)
Sublime Security
Average Rating
8.4
Reviews Sentiment
7.1
Number of Reviews
3
Ranking in other categories
Email Security (23rd)
 

Mindshare comparison

While both are Messaging and Collaboration solutions, they serve different purposes. Mimecast Advanced Email Security is designed for Secure Email Gateway (SEG) and holds a mindshare of 16.5%, up 11.6% compared to last year.
Sublime Security, on the other hand, focuses on Email Security, holds 1.6% mindshare, up 1.1% since last year.
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)
Email Security Market Share Distribution
ProductMarket Share (%)
Sublime Security1.6%
Microsoft Defender for Office 3659.1%
Proofpoint Email Protection8.1%
Other81.2%
Email Security
 

Featured Reviews

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.
reviewer2764257 - PeerSpot reviewer
Manager Security Operations Center at a educational organization with 10,001+ employees
Improves decision-making with clear verdict explanations and works well across multiple environments
I know that a lot of time has been invested in improving the efficacy of the platform, and it shows; it performs very well. Moving forward, I think our focus should be on how to achieve better integration with other systems. While they do provide API-level access and web hooks, I believe more out-of-the-box integrations with SOAR platforms and SIEM tools would enhance Sublime's value. This would allow it to be integrated more closely with the workflows of various teams and could potentially increase its market appeal. From my perspective, the tool itself functions exceptionally well, which gives me confidence in the system. I want to see this functionality extend to other tools that I use, enabling faster automation and improved workflows for the team, particularly from a security operations standpoint. I have no critiques regarding the tool itself. They've done an outstanding job and are maintaining high quality throughout their development process. They have a great product, and it's essential that they continue to uphold that standard, even though it requires significant effort.

Quotes from Members

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

Pros

"I have been satisfied with Mimecast Email Security as a good solution."
"The piece that is most valuable from the Mimecast standpoint will be the sandboxing feature."
"In terms of efficacy, Proofpoint is better than Mimecast, though it's a little difficult to manage."
"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."
"Its administration console is very easy to use. The administration console is absolutely important because you interact with the platform through it."
"It's really quite user-friendly. In terms of technical superiority and the product itself, there are no complaints. It is really cutting edge."
"The solution offers good technical support."
"Based on overall experience, Mimecast Email Security is the best solution for traditional gateways."
"I like its ability to detect and block."
"So far, I do not see any problem with Sublime Security's support or their customer service."
"Overall, the auditability and the ability to evaluate the information in Sublime through various mechanisms made me very comfortable with setting these capabilities to auto-remediation."
 

Cons

"The filtering needs more flexibility."
"The solution should include more AI features instead of Mimecast's more general static configuration tooling."
"The reaction time between a new threat being identified and Mimecast picking it up needs to be narrowed a bit."
"The price could be better, it should be reduced."
"While it's quick and easy, the initial setup could be more user-friendly."
"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."
"The product's interface could be improved to be more user-friendly."
"The detection rates are an area for improvement."
"The ability for users to look at their own quarantine box needs improvement. So at the moment, it doesn't give you the ability to see every email that has been quarantined. No end-user has the ability to see what's being quarantined. It's only people who have access to the back-end platform that can actually see what has been quarantined. The end user doesn't know if they have an email that has been quarantined, only if they're expecting something that didn't come through."
"With Sublime Security, so far, I have seen a lot of false positives, and it is something that can bring a lot of administrative overhead."
"While they do provide API-level access and web hooks, I believe more out-of-the-box integrations with SOAR platforms and SIEM tools would enhance Sublime's value."
 

Pricing and Cost Advice

"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the pricing a ten."
"The product has good pricing in terms of return on investment."
"The solution is expensive."
"It's an expensive solution."
"It is a bit expensive."
"The licensing costs are per-user for the product that you get with them."
"For what it is, the product is overpriced."
"I would rate the pricing of Sublime Security as a seven out of ten. It is reasonably well-priced."
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Top Industries

By visitors reading reviews
Computer Software Company
14%
Financial Services Firm
8%
Manufacturing Company
6%
Comms Service Provider
5%
Computer Software Company
11%
Financial Services Firm
10%
Marketing Services Firm
8%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business17
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?
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...
What is your experience regarding pricing and costs for Sublime Security?
It's very reasonable. It's competitive with its peers, especially for the number of mailboxes we have.
What needs improvement with Sublime Security?
I know that a lot of time has been invested in improving the efficacy of the platform, and it shows; it performs very well. Moving forward, I think our focus should be on how to achieve better inte...
What is your primary use case for Sublime Security?
The basic functionality provided by Microsoft Defender and its email protections was insufficient for our needs. While it effectively handled common spam and phishing attempts, we required a soluti...
 

Also Known As

Mimecast Email Security with Targeted Threat Protection
No data available
 

Overview

 

Sample Customers

Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Snowflake, Spotify, Anduril, Elastic, Compass, Encompass Health, Zscaler, Ovo Energy, Personio, Beneteler 
Find out what your peers are saying about Microsoft, Proofpoint, Abnormal AI and others in Secure Email Gateway (SEG). Updated: January 2026.
881,665 professionals have used our research since 2012.