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Microsoft Exchange Online Protection (EOP) vs Trellix Email Security comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Jan 18, 2026

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
5.9
Microsoft Exchange Online Protection effectively enhances email security, productivity, and cost-efficiency compared to rivals like AppRiver and Trend.
Sentiment score
6.4
Trellix Email Security cuts costs, boosts security, reduces incidents, and simplifies management, offering notable time-saving and ROI benefits.
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
6.4
Microsoft Exchange Online Protection support receives mixed reviews, with response times varying based on issue complexity and service level.
Sentiment score
5.7
Trellix Email Security's customer service is praised for quick responses but criticized for inconsistency and lengthy solution times.
If I had to rate the support I received on a scale of ten, I would give it a ten because he went way beyond what was expected for me.
Business Process Manager/ Educational Technologist at a educational organization with 1,001-5,000 employees
Microsoft offers excellent 24/7 support.
System Administrator at Shubham housing finance
My team is able to get the help they need when necessary.
General Manager at Ambient iT
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
7.6
Microsoft Exchange Online Protection efficiently scales from small businesses to large enterprises, offering seamless cloud migration and regular updates.
Sentiment score
6.1
Trellix Email Security offers scalable cloud and on-premises solutions, efficiently handling large volumes and evolving business needs cost-effectively.
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
Microsoft Exchange Online Protection is reliable and stable, with rare security incidents, benefiting from good maintenance and occasional third-party support.
Sentiment score
8.3
Trellix Email Security is reliable and stable, with high satisfaction in performance despite minor encryption deployment issues.
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

Microsoft Exchange Online Protection needs improved flexibility, security, user experience, intuitive interface, pricing, support, and integration with other platforms.
Trellix Email Security needs improvements in pricing, usability, reporting, and support, plus enhanced features and refined processes.
Improving the search process by allowing searches with different types of parameters and facilitating searches within emails would be advantageous.
General Manager at Ambient iT
The user interface of Microsoft Exchange Online Protection (EOP) has room for improvement.
Director at a tech services company with 11-50 employees
From an end-user point of view, I am quite happy with Microsoft Exchange Online Protection (EOP) because my favorite feature is the ease with which I can identify if an email is a phishing email or spam email.
Business Process Manager/ Educational Technologist at a educational organization with 1,001-5,000 employees
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

Microsoft Exchange Online Protection pricing is seen as generally high, but justified by security features and Microsoft's reputation.
Trellix Email Security is affordable, cost-effective, competitive against rivals, with minimal setup, user/mail-based licensing, and high satisfaction.
The pricing is reasonable.
General Manager at Ambient iT
Microsoft Exchange is more expensive compared to other services like Gmail.
System Administrator at Shubham housing finance
I find the price of Microsoft Exchange Online Protection (EOP) to be fairly reasonable, and I have no problems with it.
Director at a tech services company with 11-50 employees
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

Microsoft Exchange Online Protection offers robust security features including anti-spam, anti-phishing, malware protection, scalability, and seamless Windows integration.
Trellix Email Security offers advanced AI detection, real-time scanning, and integration to enhance threat protection and email infrastructure security.
We've benefited from the anti-phishing features of Microsoft Exchange Online Protection (EOP), as it has been quite accurate and has eliminated most of our phishing emails, making it really impressive.
Director at a tech services company with 11-50 employees
The security features provided by Microsoft are robust.
General Manager at Ambient iT
It offers more features and better security, making it the best option for corporate environments.
System Administrator at Shubham housing finance
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 consultancy with 201-500 employees
 

Categories and Ranking

Microsoft Exchange Online P...
Ranking in Email Security
9th
Average Rating
8.2
Reviews Sentiment
6.6
Number of Reviews
42
Ranking in other categories
Anti-Malware Tools (14th)
Trellix Email Security
Ranking in Email Security
14th
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 September 2026, in the Email Security category, the mindshare of Microsoft Exchange Online Protection (EOP) is 2.9%, down from 5.3% compared to the previous year. The mindshare of Trellix Email Security is 0.5%, up from 0.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Microsoft Exchange Online Protection (EOP)2.9%
Trellix Email Security0.5%
Other96.6%
Email Security
 

Featured Reviews

NancyHartman - PeerSpot reviewer
Business Process Manager/ Educational Technologist at a educational organization with 1,001-5,000 employees
Layered email security has protected sensitive research and still flags phishing in real time
The valuable features of Microsoft Exchange Online Protection (EOP) include providing an additional layer of protection, as it builds on the basic Exchange level of security that allows us to get our work done. Another feature I appreciate is the ability to question things, as our Exchange server allows us to identify in real-time if an email is a phishing email or spam email. It really helps us identify risks, especially through our external exchanges via email or through our cloud-based platforms. Our Exchange system blocks any embedded AI from all our applications and products, so we cannot use embedded AI in our daily work from our official laptops because we have secure information. The system is quite locked down.
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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Top Industries

By visitors reading reviews
Financial Services Firm
11%
Manufacturing Company
9%
Comms Service Provider
9%
Computer Software Company
8%
Outsourcing Company
13%
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 Business23
Midsize Enterprise6
Large Enterprise13
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise4
Large Enterprise7
 

Questions from the Community

What needs improvement with Microsoft Exchange Online Protection?
From an end-user point of view, I am quite happy with Microsoft Exchange Online Protection (EOP) because my favorite feature is the ease with which I can identify if an email is a phishing email or...
What is your primary use case for Microsoft Exchange Online Protection?
Microsoft Exchange Online Protection (EOP) serves as the main use case for my company because, as a research company, we require a very high level of security. We use multiple authentication method...
What advice do you have for others considering Microsoft Exchange Online Protection?
My experience with Microsoft Exchange Online Protection (EOP) is from an end-user perspective, and I do not have admin management experience. I am not familiar with the Advanced Threat Protection f...
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

Microsoft EOP, MS Exchange Online Protection
No data available
 

Overview

Find out what your peers are saying about Microsoft Exchange Online Protection (EOP) vs. Trellix Email Security and other solutions. Updated: September 2026.
914,109 professionals have used our research since 2012.