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Mimecast Advanced Email Security vs Sublime Security comparison

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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:
 

ROI

Sentiment score
5.0
Organizations find it hard to measure ROI from Mimecast's security, despite strong threat protection and appreciated features.
Sentiment score
4.3
Sublime Security boosts ROI by reducing phishing risks, optimizing efficiency, and automating responses, lowering operational costs significantly.
There is definitely a return on investment when using Mimecast, as it blocks phishing emails, reducing the risk of significant financial losses.
Senior Tech. Lead at WE
The ROI which companies see should be able to justify buying Mimecast Advanced Email Security.
Solution Architect Cybersecurity at Microland Limited
Importantly, we didn’t need to hire any additional staff; we were able to absorb this responsibility using our existing team.
Manager Security Operations Center at a educational organization with 10,001+ employees
I estimate that we have improved our efficiency, especially for phishing campaigns where we can handle multiple similar emails together, which has reduced repetitive analyst work and improved our response time.
Soc Analyst at a manufacturing company with 10,001+ employees
 

Customer Service

Sentiment score
5.5
Mimecast Advanced Email Security's customer service is generally rated highly, with prompt support but some concerns about flexibility and communication.
Sentiment score
6.2
Sublime Security is praised for accessible, knowledgeable support, ensuring smooth integration and efficiently resolving issues through effective communication.
Support personnel are hesitant to engage in remote sessions, preferring to share documentation via email.
Senior Tech. Lead at WE
The customer support for Mimecast Advanced Email Security is excellent.
Manager - EUC at Finthrive
We instantly get customer support from Mimecast Advanced Email Security whenever there is a requirement.
System Engineer II at a media company with 5,001-10,000 employees
We were able to get in touch with the person who constructed the LLM and its agentic aspects relatively quickly to address our questions.
Manager Security Operations Center at a educational organization with 10,001+ employees
I would rate customer support ten out of ten.
Soc Analyst at a manufacturing company with 10,001+ employees
 

Scalability Issues

Sentiment score
7.1
Mimecast Advanced Email Security offers high scalability, managing large user increases and email volumes efficiently across various organization sizes.
Sentiment score
7.1
Sublime Security efficiently scales with growing email volumes and evolving threats, supporting enterprise expansion while maintaining performance.
It handles email flow very smoothly, and we never face any issues with email delivery as our organization grows or email volume increases.
System Engineer II at a media company with 5,001-10,000 employees
If Mimecast Email Security introduces API solutions, it will dominate the market.
Email Security Engineer at Logic Infosecurity
While our user base remains around 2,200, I believe it can adapt to much larger requirements as needed, based on discussions with others managing larger organizations.
Manager - EUC at Finthrive
Despite nearly doubling the number of mailboxes and adding significantly more detection rules, the service remains just as fast as it was when we first implemented it.
Manager Security Operations Center at a educational organization with 10,001+ employees
Its scalability is also good, as it can scale with the number of protected mailboxes or users, or as email volume grows, supporting enterprise development across Microsoft 365 or Google Workspace.
Soc Analyst at a manufacturing company with 10,001+ employees
 

Stability Issues

Sentiment score
7.6
Mimecast Advanced Email Security is praised for stability and effectiveness, despite occasional downtime and login issues.
Sentiment score
8.6
Sublime Security is highly praised for stability, reliability, zero-crash performance, efficient threat handling, and scalable infrastructure.
They confirm it's a good solution where only one or two rare emails get through, while the rest are properly blocked without any issues.
Email Security Engineer at Logic Infosecurity
When it comes to stability and reliability, we have not faced any notable issues with Mimecast Advanced Email Security for our customers.
Senior Consultant at a tech vendor with 10,001+ employees
The issues we did have were causing quite a lot of problems.
IT Manager at a logistics company with 201-500 employees
Sublime Security acted quickly; once Microsoft alerted Outlook about the incoming email, Sublime Security managed to pull it from the stream before it had a chance to appear in the user's inbox.
Manager Security Operations Center at a educational organization with 10,001+ employees
 

Room For Improvement

Mimecast needs improvements in customer support, interface, spam filtering, training resources, pricing, and administrative simplicity to enhance user experience.
Sublime Security requires enhanced reporting, better integration, improved automation, and accessible pricing to appeal to mid-sized businesses.
When you buy an XDR provider, they give you a complete holistic story around it, showing what has happened, which email somebody has clicked on, whether there have been any changes, and whether there is any network activity.
Solution Architect Cybersecurity at Microland Limited
Instead of reactive measures, it could proactively identify spam domains and prevent them from derailing mail flow.
Senior Consultant at a tech vendor with 10,001+ employees
A lot of emails were missed despite being known samples.
Senior Tech. Lead at WE
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.
Manager Security Operations Center at a educational organization with 10,001+ employees
One breach could potentially put a small company out of business, so having a tool such as this might save them from that fate.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
Sublime Security could be improved by enabling more integration, better customization of alerts, and more detailed reporting.
Soc Analyst at a manufacturing company with 10,001+ employees
 

Setup Cost

Mimecast Advanced Email Security is seen as costly, compared to competitors, particularly in price-sensitive markets like India.
Sublime Security offers cost-effective email protection via AWS Marketplace, praised for its value despite higher subscription fees.
The pricing is higher for Mimecast, particularly for the Indian market, where it is considered expensive.
Senior Tech. Lead at WE
Regarding the price, I think that in terms of similar products, it is pretty much in the same line, so I think it's reasonable.
IT Manager at a logistics company with 201-500 employees
Overall, my experience with pricing, setup costs, and licensing was smooth.
Manager - EUC at Finthrive
It's competitive with its peers, especially for the number of mailboxes we have.
Manager Security Operations Center at a educational organization with 10,001+ employees
 

Valuable Features

Mimecast Advanced Email Security offers robust threat protection, easy configuration, scalability, and seamless integration with Microsoft 365 for enhanced security.
Sublime Security enhances email protection with advanced threat detection, AI analytics, seamless integrations, and automated remediation.
There was a signature phishing scam on the internet, but Mimecast Advanced Email Security caught it before it came to fruition and instantly blocked that signature-based phishing scam.
System Engineer II at a media company with 5,001-10,000 employees
It easily generates reports about the kinds of emails coming in weekly and classifies them into various categories, making it very helpful to analyze and ensure our email gateway remains safe and secure by updating all security patches.
Senior Managing Consultant at a tech vendor with 10,001+ employees
A distinct advantage of Mimecast is its ability to block phishing and impostor attacks, which are significant threats currently.
Senior Tech. Lead at WE
This level of detail is essential for analysts and anyone conducting evaluations, as it helps them understand the specific circumstances of their environment.
Manager Security Operations Center at a educational organization with 10,001+ employees
It adds a smarter layer that catches anything missed by Microsoft 365 or Google Workspace protection.
Partner Account Manager at a wholesaler/distributor with 51-200 employees
The best features of Sublime Security are advanced phishing and BEC detection, campaign grouping, threat hunting, and automated remediation.
Soc Analyst at a manufacturing company with 10,001+ employees
 

Categories and Ranking

Mimecast Advanced Email Sec...
Ranking in Email Security
5th
Average Rating
8.0
Reviews Sentiment
5.9
Number of Reviews
45
Ranking in other categories
Email Archiving (2nd), Office 365 Protection (2nd), Secure Email Gateway (SEG) (3rd)
Sublime Security
Ranking in Email Security
15th
Average Rating
9.0
Reviews Sentiment
6.5
Number of Reviews
6
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2026, in the Email Security category, the mindshare of Mimecast Advanced Email Security is 3.8%, down from 5.6% compared to the previous year. The mindshare of Sublime Security is 1.2%, down from 1.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Mimecast Advanced Email Security3.8%
Sublime Security1.2%
Other95.0%
Email Security
 

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.
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.
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Top Industries

By visitors reading reviews
Computer Software Company
10%
Outsourcing Company
9%
Financial Services Firm
9%
Construction Company
8%
Outsourcing Company
11%
Computer Software Company
9%
Financial Services Firm
9%
Marketing Services Firm
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business19
Midsize Enterprise13
Large Enterprise21
By reviewers
Company SizeCount
Small Business8
Midsize Enterprise5
Large Enterprise10
 

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...
What is your experience regarding pricing and costs for Sublime Security?
My experience with pricing, setup cost, and licensing is limited, but I noticed that Sublime Security was slightly more expensive than Avanan or Defender, as Defender comes included with other Micr...
What needs improvement with Sublime Security?
I would say there are very minimal changes needed regarding Sublime Security; for first-time users, it can be difficult knowing how to write the tool. Having some templates available would improve ...
What is your primary use case for Sublime Security?
My main use case for Sublime Security is to test how this product works, so I am using this for that purpose. For a quick specific example of what I tested with Sublime Security, it detects the ema...
 

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

Hewlett-Packard Company (HP), Cushman and Wakefield, PIB Group, Swissport
Snowflake, Spotify, Anduril, Elastic, Compass, Encompass Health, Zscaler, Ovo Energy, Personio, Beneteler 
Find out what your peers are saying about Mimecast Advanced Email Security vs. Sublime Security and other solutions. Updated: August 2026.
911,994 professionals have used our research since 2012.