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Mimecast Advanced Email Security vs Trellix Email 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
5.1
Mimecast Advanced Email Security provides cost-effective, high-level protection, with acknowledged ROI and justified purchasing despite support and stability issues.
Sentiment score
6.4
Trellix Email Security cuts costs, boosts security, reduces incidents, and simplifies management, offering notable time-saving and ROI benefits.
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
It reduces costs by almost 40% or 45% compared to other security solutions.
Senior Technical Support Engineer at Digitaltrack
The question is what would happen if an organization did not have this security measure in place and got hit by ransomware.
Security Consultant at Trinexia
One of the main positive impacts of Trellix Email Security is its ability to detect and respond to phishing and suspicious email activity much faster.
Technical Business Analyst at a financial services firm with 10,001+ employees
 

Customer Service

Sentiment score
5.6
Mimecast Advanced Email Security provides responsive support but could improve flexibility; subscribers appreciate fast responses despite reduced direct interaction.
Sentiment score
5.7
Trellix Email Security's customer service is praised for quick responses but criticized for inconsistency and lengthy solution times.
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
Solutions take three to four weeks maximum if you want something fixed.
Associate Cybersecurity Analyst at a tech vendor with 10,001+ employees
Trellix should have a dedicated center for the African market due to the unique dynamics and challenges within this region.
Partner Account Manager at a consumer goods company with 11-50 employees
We raise a case on the customer portal, and our engineer will be aligned with us, and the engineer resolves the issue.
Security Engineer at itsipl
 

Scalability Issues

Sentiment score
7.0
Mimecast Advanced Email Security offers seamless scalability and adaptability for organizations of all sizes, efficiently handling diverse user demands.
Sentiment score
6.1
Trellix Email Security offers scalable cloud and on-premises solutions, efficiently handling large volumes and evolving business needs cost-effectively.
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
The scalability rates at nine out of ten.
Senior Technical Support Engineer at Digitaltrack
I would rate scalability between eight and nine because Trellix Email Security can be deployed in the cloud or on-premises, and in terms of scale, it can handle any size.
Security Consultant at Trinexia
The scalability of Trellix Email Security is excellent.
Senior Soc Analyst at a consultancy with 11-50 employees
 

Stability Issues

Sentiment score
7.7
Mimecast Advanced Email Security offers high stability with minimal issues, maintaining fast, reliable, and effective threat protection over time.
Sentiment score
8.3
Trellix Email Security is reliable and stable, with high satisfaction in performance despite minor encryption deployment issues.
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
In terms of product stability, I would rate Trellix Email Security between eight and nine because the solution is quite stable.
Security Consultant at Trinexia
Trellix Email Security is very stable, with no downtime noticed.
Team Manager at Ford
Whenever we deploy the product from the ePO console to that particular machine, it shows that the product is inactive.
Information Security Engineer at Nhq Distribution Ltd
 

Room For Improvement

Mimecast Advanced Email Security needs better user interface, customer support, pricing, and improved handling of false positives and phishing.
Trellix Email Security needs improvements in pricing, usability, reporting, and support, plus enhanced features and refined processes.
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
If they provide better customization options, it would be easier to understand everything in a single dashboard instead of navigating through dropdown menus to see reports.
Senior Technical Support Engineer at Digitaltrack
I think there is a high number of false positives that also need attention.
Team Manager at Ford
They want to get the actual report on that, why they are sending and which way they are sending these emails.
Information Security Engineer at Nhq Distribution Ltd
 

Setup Cost

Mimecast Advanced Email Security is often viewed as expensive, with costs per user and extra charges for features.
Trellix Email Security is affordable, cost-effective, competitive against rivals, with minimal setup, user/mail-based licensing, and high satisfaction.
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
I am satisfied with the secure licensing cost because compared to other solutions, Trellix Email Security is cheaper and provides most features.
Senior Technical Support Engineer at Digitaltrack
In my case, it is somewhat cost-effective and affordable.
Team Manager at Ford
The licensing is per user.
Security Engineer at itsipl
 

Valuable Features

Mimecast Advanced Email Security provides comprehensive email protection with AI-driven analysis and seamless Microsoft 365 integration for enhanced safety.
Trellix Email Security offers advanced AI detection, real-time scanning, and integration to enhance threat protection and email infrastructure security.
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
If users try to open links that have converted to phishing after some time, those need to be blocked.
Senior Technical Support Engineer at Digitaltrack
My experience with the malware analysis and quarantine features is that they are easy to manage and they have been very effective because we have been able to quarantine any suspicious emails or prevent any attempt before it affects our systems.
Team Manager at Ford
Monitoring and threat tracking in Trellix Email Security have the potential to reduce significantly the threats because I am able to review and analyze in real-time any potential threats to my environment and tackle them immediately.
Sr. Service Delivery Consultant at a recruiting/HR firm with 11-50 employees
 

Categories and Ranking

Mimecast Advanced Email Sec...
Ranking in Email Security
4th
Average Rating
8.0
Reviews Sentiment
5.9
Number of Reviews
48
Ranking in other categories
Email Archiving (1st), Office 365 Protection (2nd), Secure Email Gateway (SEG) (3rd)
Trellix Email Security
Ranking in Email Security
13th
Average Rating
8.8
Reviews Sentiment
6.2
Number of Reviews
13
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 Trellix Email Security is 0.5%, up from 0.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Mimecast Advanced Email Security3.9%
Trellix Email Security0.5%
Other95.6%
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.
Anastasia Wairimu - PeerSpot reviewer
Team Manager at Ford
Gateway filtering has protected our organization and provides complete email threat prevention
In my opinion, the best features Trellix Email Security offers include its use for malware analysis as well as the enterprise-wide email quarantine system. My experience with the malware analysis and quarantine features is that they are easy to manage and they have been very effective because we have been able to quarantine any suspicious emails or prevent any attempt before it affects our systems. It is also very user-friendly and has a simple interface. Policies and rules are easy to create and they work with very little downtime or operational impact. Email delivery issues are easy to investigate and troubleshoot. Trellix Email Security has positively impacted my organization as it is user-friendly and does a good job detecting malicious attachments in email, providing complete email protection against all users and working well to stop advanced threats. The price is relatively the same as other competitors.
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915,341 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Outsourcing Company
10%
Computer Software Company
9%
Financial Services Firm
9%
Construction Company
8%
Outsourcing Company
14%
Construction Company
12%
Financial Services Firm
10%
Computer Software Company
10%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise13
Large Enterprise23
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise3
Large Enterprise7
 

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 Trellix Email Security?
My experience with pricing, setup cost, and licensing for Trellix Email Security is that everything good has a price. When we look at the cost relative to what it secures, I think that is acceptabl...
What needs improvement with Trellix Email Security?
Trellix Email Security can be improved in several areas. Although it has almost all the features that an email security tool should have, it could advance further with different types of attacks th...
What is your primary use case for Trellix Email Security?
My main use case for Trellix Email Security is for external communication, where we use the IOCs that we already have for phishing domains to capture phishing emails. For internal emails and outbou...
 

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
Information Not Available
Find out what your peers are saying about Mimecast Advanced Email Security vs. Trellix Email Security and other solutions. Updated: September 2026.
915,341 professionals have used our research since 2012.