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Mimecast Email Security vs Trellix Collaboration Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 5, 2024

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
Ranking in Secure Email Gateway (SEG)
4th
Average Rating
8.0
Reviews Sentiment
6.1
Number of Reviews
31
Ranking in other categories
Office 365 Protection (3rd)
Trellix Collaboration Security
Ranking in Secure Email Gateway (SEG)
8th
Average Rating
8.6
Reviews Sentiment
7.0
Number of Reviews
15
Ranking in other categories
Email Security (18th), Instant Communications Security and Compliance (4th)
 

Mindshare comparison

As of November 2025, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Email Security is 12.8%, down from 14.1% compared to the previous year. The mindshare of Trellix Collaboration Security is 2.2%, down from 2.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Market Share Distribution
ProductMarket Share (%)
Mimecast Email Security12.8%
Trellix Collaboration Security2.2%
Other85.0%
Secure Email Gateway (SEG)
 

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.
BernardLugalia - PeerSpot reviewer
Provides strong data protection with virtual patching and vulnerability assessments
I primarily use it to monitor database access, particularly in banking and similar environments. It ensures that IT personnel and others do not create unauthorized accounts or users. Collaboration security assists in tracking database access and alerts in case of suspicious activity One of the…

Quotes from Members

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

Pros

"The setup was easy."
"Due to our specialized use case, that HIPAA dictionary really comes in handy."
"I recommend Mimecast based on customer requirements and budget."
"The solution is scalable."
"Mimecast certainly helped my customers reduce phishing emails."
"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."
"The initial setup is very straightforward."
"I like FireEye's filtering, spam digests, and its advanced threat review of email flow. It also has a broad range of riskware rules you can deploy."
"Trellix Collaboration Security is valued for being a stable and comprehensive solution that fulfills customer needs."
"FireEye Email Security is easy to use."
"One of the valuable features of the product stems from the fact that it is easy to implement the tool in our environment."
"We can control this solution from the cloud and are able to access it from wherever we are."
"The solution's most valuable feature is its simplicity. It's very user-friendly."
"One of the most valuable features is the protection against vulnerabilities, particularly through virtual patching."
"FireEye Email Security helps us prevent spam and phishing emails and all other business-compromised email attacks."
 

Cons

"The system is not user-friendly because you have to create policies that are mapped in a dictionary."
"The installation is not so straightforward."
"The solution is very expensive."
"We discussed the phishing aspect, the DNS system, and the key rotation."
"Their support should be improved. They are notorious for sending you to knowledge-based articles rather than actually talking to you, but that is, unfortunately, kind of becoming a trend with everything. In terms of features, I haven't had any complaints. However, I don't like the fact they moved to a paid training subscription model. They used to have a lot of free webinars for training, but they have started to charge for them in the past year."
"Mimecast needs to reduce the number of false positive emails; a big pain point for us."
"The attachment scanning feature doesn't work properly."
"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 solution is not easy to set up. However, we have employees that have the knowledge that can do the difficult implementation. It would be better if the process was easier."
"I would like the solution to be able to automatically quarantine the malicious emails before getting to the user's mailbox and continue with regular email operations. This could result in the user clicking the email before the purge operation is completed."
"The custom tailoring is limited."
"The spam detection feature could be better."
"Sometimes, integration can be challenging, impacting its stability, which is why I rate it a five out of ten."
"Sometimes especially zero-day spam emails can be passed to the user's inbox."
"The reporting aspect of the solution needs improvement."
"If they want to be the primary or best solution, they need to have better email management features."
 

Pricing and Cost Advice

"It's an expensive solution."
"On a scale of one to ten, where one is cheap, and ten is expensive, I rate the pricing a ten."
"I'm always going to say the price needs to be lower, but it's reasonable."
"Compared to the other solutions in the market, Mimecast Email Security with Targeted Threat Protection's pricing is fine."
"The product price is moderate. I rate the pricing a five out of ten."
"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."
"For what it is, the product is overpriced."
"The customers can select the license packages as per their requirements."
"I rate the product price as nine out of ten, where ten is the most expensive, and one is the cheapest. There is no need to pay any extra charges apart from the licensing costs."
"The cost is very high."
"The solution requires a license to be purchased for every user."
"The licensing is on a yearly basis."
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Financial Services Firm
7%
Manufacturing Company
6%
Comms Service Provider
6%
Manufacturing Company
18%
Comms Service Provider
11%
Computer Software Company
10%
Government
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business16
Midsize Enterprise7
Large Enterprise11
By reviewers
Company SizeCount
Small Business6
Midsize Enterprise4
Large Enterprise5
 

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 FireEye Email Security?
One of the valuable features of the product stems from the fact that it is easy to implement the tool in our environment.
What needs improvement with FireEye Email Security?
I would like to see the addition of email digital protection features, such as anti-spam and antivirus, not just sandboxing, in the on-premises solution.
What is your primary use case for FireEye Email Security?
I have worked on Email Security ( /categories/email-security ) both on-premises and in the cloud, Web Security, and also on MDR, which is called HX endpoint security for Trellix Collaboration Secur...
 

Also Known As

Mimecast Email Security with Targeted Threat Protection
FireEye Email Security
 

Overview

 

Sample Customers

Azizi Developments, Affinity Credit Union, Aftercare, Al Abbar Group
Northshore Utility District, Luz Technologies, Air Academy Federal Credit Union, Bank Gutmann, Bank of Thailand, Penn State Health Milton S. Hershey Medical Center, State of Missouri, City and County of San Francisco, Denver Public Schools, Vodafone, Go Auto, Stater Bros. Market
Find out what your peers are saying about Mimecast Email Security vs. Trellix Collaboration Security and other solutions. Updated: September 2025.
873,085 professionals have used our research since 2012.