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Mimecast 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 Email Security
Average Rating
8.0
Reviews Sentiment
6.1
Number of Reviews
31
Ranking in other categories
Office 365 Protection (3rd), Secure Email Gateway (SEG) (4th)
Sublime Security
Average Rating
9.0
Reviews Sentiment
7.5
Number of Reviews
2
Ranking in other categories
Email Security (21st)
 

Mindshare comparison

While both are Messaging and Collaboration solutions, they serve different purposes. Mimecast Email Security is designed for Secure Email Gateway (SEG) and holds a mindshare of 12.5%, down 15.0% compared to last year.
Sublime Security, on the other hand, focuses on Email Security, holds 1.6% mindshare, up 0.9% since last year.
Secure Email Gateway (SEG) Market Share Distribution
ProductMarket Share (%)
Mimecast Email Security12.5%
Microsoft Defender for Office 36527.6%
Proofpoint Email Protection21.0%
Other38.9%
Secure Email Gateway (SEG)
Email Security Market Share Distribution
ProductMarket Share (%)
Sublime Security1.6%
Microsoft Defender for Office 36511.4%
Proofpoint Email Protection8.2%
Other78.8%
Email Security
 

Featured Reviews

Frank Rawson - PeerSpot reviewer
It gives clients peace of mind and helps them educate their users about threats
A few years ago, our team found the implementation to be somewhat challenging. It has gotten easier as we've grown more experienced. The difficulty depends on the expertise of the person doing it. I don't work with Mimecast every day, so it might be more difficult for me than it is for one of my techs who regularly does Mimecast implementations. It requires some specific in-depth product knowledge and an understanding of email solutions. The deployment time varies. In South Africa, it depends on who you use to deploy it. If you use one of Mimecast's local partners, it can take up to two weeks because of their process. However, it's only about four to eight hours of work. After deployment, there isn't much maintenance aside from supporting and educating your customers. Users require constant education on how to use the Mimecast client and release an email that has been blocked.
LARK IT - PeerSpot reviewer
Easy to setup, stable and highly scalable
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. In future releases, I would just like to see that ability for users to see what's being quarantined and what's not quarantined but safe. Just those genuine false positives.

Quotes from Members

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

Pros

"Email security is the most valuable feature of the solution."
"Its administration console is very easy to use. The administration console is absolutely important because you interact with the platform through it."
"In the current environment that the world is in, everyone is trying to hack everyone else, so Project+ definitely helps a lot there."
"Due to our specialized use case, that HIPAA dictionary really comes in handy."
"It does a good job for us, and its admin console is easy to use."
"The product's most valuable features are impersonation protection and phishing countermeasures."
"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."
"The piece that is most valuable from the Mimecast standpoint will be the sandboxing feature."
"I like its ability to detect and block."
"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 solution's console interface was recently changed for the admins, but the previous one was much better because we could open tabs on it."
"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 detection rates are an area for improvement."
"Mimecast needs to reduce the number of false positive emails; a big pain point for us."
"The tool can be challenging because it relies on rule-based configurations, especially for addressing impersonation threats. This approach requires setting up numerous rules to ensure filtering. It should work based on behavior-based analytics."
"Mimecast need to ensure that the body text format is correctly handled and that images are properly embedded in the body text."
"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."
"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 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."
"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

"The product has good pricing in terms of return on investment."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"It is a bit 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."
"The customers can select the license packages as per their requirements."
"The solution is expensive."
"We pay monthly fees to our provider."
"It's an expensive solution."
"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
15%
Financial Services Firm
7%
Manufacturing Company
7%
Comms Service Provider
6%
Computer Software Company
13%
Financial Services Firm
9%
Marketing Services Firm
8%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business16
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?
Mimecast Email Security can be improved by adding some API integrations. Instead of remaining a traditional gateway, Mimecast Email Security needs to provide API solutions similar to Check Point.
What do you like most about Sublime Security?
I like its ability to detect and block.
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...
 

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
Information Not Available
Find out what your peers are saying about Microsoft, Abnormal AI, Proofpoint and others in Secure Email Gateway (SEG). Updated: October 2025.
872,706 professionals have used our research since 2012.