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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
4.8
Mimecast Advanced Email Security offers strong protection but ROI is hard to quantify, with mixed value perceptions and stability concerns.
Sentiment score
4.5
Sublime Security reduces security risks and costs, enhances efficiency, and streamlines email investigations, improving organizational operations.
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
The biggest impact Mimecast Advanced Email Security has had is on the cybersecurity environment, being the first to scan emails for malicious content.
Information Security Sepcialist at Transnet
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
I think the ROI for us is primarily in reduced security risk and reduced analyst time.
Technical Lead at a consultancy with 11-50 employees
 

Customer Service

Sentiment score
5.7
Mimecast's technical support is effective and timely, but some users desire faster responses and more direct communication.
Sentiment score
6.3
Sublime Security offers highly rated customer support with efficient responses, expert teams, and excellent communication channels for quick resolutions.
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
They're able to understand the context of an incident rather than just treating it as a generic support ticket.
Technical Lead at a consultancy with 11-50 employees
I would rate customer support ten out of ten.
Soc Analyst at a manufacturing company with 10,001+ employees
 

Scalability Issues

Sentiment score
6.8
Mimecast Advanced Email Security offers scalable solutions for businesses, efficiently handling growth and changes with minimal disruptions.
Sentiment score
7.1
Sublime Security is highly scalable and resource-efficient, effectively handling large email volumes across Microsoft 365 and Google Workspace.
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
We have a fairly large Microsoft 365 environment and haven't had any problems with the platform keeping up with our email volume.
Technical Lead at a consultancy with 11-50 employees
 

Stability Issues

Sentiment score
7.6
Mimecast Advanced Email Security is praised for its stability and reliability, with minimal issues and efficient resolution of login troubles.
Sentiment score
8.7
Sublime Security offers stable, reliable email security with quick performance, efficient threat detection, and no downtime or crashes.
Mimecast Advanced Email Security is very stable, reliable, and quite accurate.
SOC L2 Analyst at a tech services company with 51-200 employees
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
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 Advanced Email Security needs better support, usability, flexible filtering, AI integration, and competitive pricing for improved user experience.
Sublime Security should enhance user onboarding, integration, customization, and reporting while addressing pricing and reducing false positives.
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
These days, traditional email security does not work as effectively. With AI emerging, traditional email security is less effective.
Cybersecurity Account Manager at a tech services company with 51-200 employees
Often I have to prepare reports for our CEOs, and they want it in a less technical way, a simpler view of things such as threats blocked, incidents investigated, and overall risk reduction.
Technical Lead at a consultancy with 11-50 employees
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
 

Setup Cost

Enterprise buyers find Mimecast's pricing relatively high, with discounts available for larger organizations and yearly subscriptions.
Sublime Security's pricing is higher but justified by effective threat prevention, with competitive AWS Marketplace setup and licensing.
The pricing is higher for Mimecast, particularly for the Indian market, where it is considered expensive.
Senior Tech. Lead at WE
We focus on the security side of it, but we do not have a massive IT team, and the product really reduces any issues where IT has to step in and handle something.
System Architect at ECPTA
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
I can also understand why some people might say it's expensive.
Technical Lead at a consultancy with 11-50 employees
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 excels in phishing prevention, seamless Microsoft 365 integration, and offers strong threat detection and security features.
Sublime Security offers advanced phishing detection, AI analysis, and automated threat responses, enhancing email security and reducing manual efforts.
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
The best features of Mimecast Advanced Email Security are strong phishing and spam filtering, URL malicious link protection, attachment inspection, impersonation and business email compromise protection, flexible email security policies, and good visibility into the email activity.
SOC L2 Analyst at a tech services company with 51-200 employees
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
4th
Average Rating
8.2
Reviews Sentiment
5.9
Number of Reviews
49
Ranking in other categories
Email Archiving (1st), Office 365 Protection (2nd), Secure Email Gateway (SEG) (3rd)
Sublime Security
Ranking in Email Security
14th
Average Rating
9.0
Reviews Sentiment
6.5
Number of Reviews
7
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2026, in the Email Security category, the mindshare of Mimecast Advanced Email Security is 3.9%, down from 5.5% compared to the previous year. The mindshare of Sublime Security is 1.1%, 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 Security3.9%
Sublime Security1.1%
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.
reviewer2891127 - PeerSpot reviewer
Technical Lead at a consultancy with 11-50 employees
Email defenses have reduced manual phishing work and now give clear visibility into threats
I'd say the best features Sublime Security offers are the threat detection and investigation capabilities, which are probably the most valuable part for us. I particularly appreciate the visibility into the email activity and the ability to investigate suspicious messages and understand why something was flagged. I'd say the protection against more sophisticated phishing and business email compromise attacks is also important. Those are difficult to deal with because they don't always contain obvious malware. The investigation capabilities of Sublime Security stand out because they surface themselves in a very nice, obvious way. So when we are investigating, they're just easy to spot and easy to identify. The UI is very clear for us, and overall it's just what we would expect. Regarding Sublime Security's AI capabilities, I think it's honestly pretty good. I haven't had any issues with either the governance side or the security side. I think Sublime Security has been very accurate. For us, it's certainly stopped a lot of the manual investigation that we often do for phishing emails or malicious emails. Occasionally, it does give us false positives, but that's just a five-minute review of something, so it still cuts a lot of time down.
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Top Industries

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

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business23
Midsize Enterprise12
Large Enterprise23
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise5
Large Enterprise11
 

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?
Pricing for Sublime Security seems appropriate for an enterprise security product. It's not really the cheapest option, but it benefits us. The overall cost does need to be considered against the s...
What needs improvement with Sublime Security?
The product is powerful, but I suppose there are areas where someone new to the platform needs some time to understand all of the available functionality. It can be quite a lot as a new user to abs...
What is your primary use case for Sublime Security?
Our primary use case for Sublime Security is email security, so we use Sublime Security to protect Microsoft 365 email against phishing, business email compromise, any malicious links and attachmen...
 

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: September 2026.
918,169 professionals have used our research since 2012.