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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
32
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 (5th)
 

Mindshare comparison

As of September 2025, in the Secure Email Gateway (SEG) category, the mindshare of Mimecast Email Security is 12.6%, down from 15.4% compared to the previous year. The mindshare of Trellix Collaboration Security is 2.3%, down from 2.4% 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 Security12.6%
Trellix Collaboration Security2.3%
Other85.1%
Secure Email Gateway (SEG)
 

Featured Reviews

ShaheenKapery - PeerSpot reviewer
Provides valuable security features and has a straightforward setup process
The initial setup process is straightforward and takes a weekend at most. A .com domain can take up to forty-eight hours, while a local domain takes about four to eight hours because it has to propagate through the international DNS records. It is a cloud-only solution. If you're managing email security on-premises, you use your bandwidth to download emails, including spam, and then use your servers to clean it up. For example, say a third of your email is spam; this consumes significant bandwidth and resources. However, if you use Mimecast, they filter the emails on their servers before delivering them to you. It can be a major selling point in regions with expensive bandwidth, such as Africa. You can save bandwidth and improve overall efficiency by offloading the spam filtering to Mimecast.
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 solution is pretty straightforward to use and easy to set up."
"Based on overall experience, Mimecast Email Security is the best solution for traditional gateways."
"We like Mimecast's spam filtering. The email signature feature is also a big plus for our users."
"Due to our specialized use case, that HIPAA dictionary really comes in handy."
"It's good, it keeps the spam out."
"I would rate Mimecast Email Security a nine out of ten."
"The initial setup is very straightforward."
"I recommend Mimecast based on customer requirements and budget."
"One of the most valuable features is the protection against vulnerabilities, particularly through virtual patching."
"We can control this solution from the cloud and are able to access it from wherever we are."
"The product protects my email."
"FireEye is good for malware depicting and security."
"The solution's most valuable feature is its simplicity. It's very user-friendly."
"We have had very good results from the use of FireEye Email Security. We are very comfortable with this technology, but I don't know if it's necessary to move into the cloud, we will check other technologies and study them. Additionally, the solution has good integration."
"Trellix Collaboration Security is valued for being a stable and comprehensive solution that fulfills customer needs."
"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."
 

Cons

"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 feature that should be included is to remove the block on the encrypted files."
"The solution is very expensive."
"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."
"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."
"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."
"I'd like to have better support from the product in the future."
"The product's interface could be improved to be more user-friendly."
"The solution needs better support."
"Sometimes especially zero-day spam emails can be passed to the user's inbox."
"In general, our company should make the tool more robust to protect our systems."
"If they want to be the primary or best solution, they need to have better email management features."
"Sometimes, integration can be challenging, impacting its stability, which is why I rate it a five out of ten."
"There is a need for improved integration with totally different products, such as a rapid server."
"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."
"FireEye needs single sign-on. They say it's on their roadmap. They should also implement support for Microsoft Authenticator app for 2FA."
 

Pricing and Cost Advice

"The product has good pricing in terms of return on investment."
"The licensing costs are per-user for the product that you get with them."
"The customers can select the license packages as per their requirements."
"For what it is, the product is overpriced."
"We pay monthly fees to our provider."
"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."
"It's an expensive solution."
"The solution is expensive."
"The cost is very high."
"The licensing is on a yearly basis."
"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 solution requires a license to be purchased for every user."
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Top Industries

By visitors reading reviews
Computer Software Company
14%
Financial Services Firm
7%
Manufacturing Company
7%
Comms Service Provider
6%
Manufacturing Company
19%
Computer Software Company
11%
Comms Service Provider
9%
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?
If I ask you about the room for improvement, we discussed the phishing aspect, the DNS system, and the key rotation. Apart from that, are there any other areas that you would like to see improved o...
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: July 2025.
867,370 professionals have used our research since 2012.