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Microsoft Defender for Office 365 vs Trellix Collaboration Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Dec 3, 2024

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
7.1
Microsoft Defender for Office 365 boosts efficiency, cuts phishing, integrates security, reduces tool costs, and mitigates risk.
Sentiment score
8.0
Trellix Collaboration Security boosts ROI by reducing incidents, improving efficiency, and lowering manual workload and false positives.
It has also decreased our time to detection and response by about 15 to 20 percent.
Technology support manager at Alfred State College
Overall, cost of owning and operating our system goes down.
Designation Chief Consultant at Avtow
It's hard to quantify the return on investment we've seen from Microsoft Defender for Office 365.
Chief Architect at a tech vendor with 1,001-5,000 employees
I have seen a return on investment with Trellix Collaboration Security; specifically, money was saved and fewer employees were needed because I do not need employees on different sites.
Network & Security Lead at Net-International
I observe that the return on investment is hindered by the lack of adequate training opportunities, with Trellix's own training being quite costly, ranging from 2,000 to 4,000 dollars, which many small or medium-sized businesses cannot afford.
Endpoint Security Analyst at BNP Paribas
I have seen a return on investment from using Trellix Collaboration Security as we have saved time and reduced security incidents, improving our overall effectiveness.
Sr Network & System Engineer at a tech services company with 11-50 employees
 

Customer Service

Sentiment score
5.7
Microsoft Defender for Office 365 support is reliable but varies with subscription level and complexity of issues.
Sentiment score
6.8
Trellix Collaboration Security support is mixed; praised for knowledgeable service but criticized for inconsistent response times globally.
Over the past two years, there have been no critical problems.
Solution Consultant at BIM Group of Companies
we opened tickets, and they typically resolve them quickly.
Chief Architect at a tech vendor with 1,001-5,000 employees
With a subscription for Microsoft Defender for Office 365, it is an eight. Without it, it is a six.
Manager at a tech services company with 10,001+ employees
My experience with the Indian support team was not as satisfactory since they did not provide adequate support to rectify issues.
Network & Security Lead at Net-International
They have dedicated email security support engineers.
Security Engineer at itsipl
Very knowledgeable engineers on the product who have addressed any questions or issues.
Technical Specialist at VDA Infosolutions Pvt. Ltd.
 

Scalability Issues

Sentiment score
7.8
Microsoft Defender for Office 365 efficiently scales with cloud-native design, ensuring reliable performance and seamless integration for diverse organizations.
Sentiment score
8.0
Trellix Collaboration Security is highly scalable, adaptable, and efficiently manages environments, but licensing may impact scaling.
We have never faced scalability problems, and Microsoft manages it effectively.
Solution Consultant at BIM Group of Companies
Microsoft Defender for Office 365 scales transparently for us, as we grew from 1,000 users to 3,000 users, and we didn't notice much difference.
Chief Architect at a tech vendor with 1,001-5,000 employees
Microsoft Defender for Office 365 scales with the growing needs of my company well.
Senior Client Director and Advisory Service Leader at Crossfuze
Scalability benefits me by allowing for growth.
Cyber Security Engineer at a tech services company with 11-50 employees
Trellix Collaboration Security scalability allows me to use sensors on-cloud, on-premises, inside premises, and in a hybrid environment.
Network & Security Lead at Net-International
Trellix Collaboration Security is very good when it comes to scalability, demonstrating impressive capacity for growth.
Endpoint Security Analyst at BNP Paribas
 

Stability Issues

Sentiment score
7.8
Microsoft Defender for Office 365 offers consistently reliable performance with minimal downtime, high user ratings, and manageable minor issues.
Sentiment score
8.2
Trellix Collaboration Security offers high stability and reliability, with rare issues primarily during complex API integrations across environments.
I would rate the stability of Microsoft Defender for Office 365 as 10 over 10 because it's highly available, it works, and it does the job it is meant to do.
Cloud Solutions Architect at a tech services company with 201-500 employees
I have not experienced any downtime, crashes, or performance issues because of Defender.
Technology Associate at a financial services firm with 51-200 employees
The solution is stable, as we have been using it for the past two years.
Solution Consultant at BIM Group of Companies
Sometimes, integration can be challenging, impacting its stability.
Cyber Security Engineer at a tech services company with 11-50 employees
 

Room For Improvement

Microsoft Defender for Office 365 needs improvements in usability, false positive reduction, phishing detection, scalability, and reporting capabilities.
Trellix Collaboration Security needs improved reporting, customization, interface, language support, and stronger data loss prevention capabilities.
The main area for improvement is simplifying the implementation and rollout process.
Infrastructure and Security Lead at Vedanta
Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published.
Solution Consultant at BIM Group of Companies
There is a different console for different things; I just want one consolidated console.
Senior Director, Security Architecture & Engineering at a leisure / travel company with 10,001+ employees
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.
Senior Team Leader at BMB
To improve vulnerabilities, Trellix can use an automation process to check if the system is vulnerable.
Network & Security Lead at Net-International
Trellix Collaboration Security is working smoothly.
Technical Specialist at VDA Infosolutions Pvt. Ltd.
 

Setup Cost

Microsoft Defender for Office 365 is cost-effective with E5, costly standalone, requiring careful planning for subscription-based licensing.
Trellix Collaboration Security's pricing varies, seen as affordable by some but costly for smaller businesses, with flexible licensing options.
We've likely saved 30% of costs.
Designation Chief Consultant at Avtow
Money-wise, it is a part of the Office 365 suite, making it slightly more expensive compared to Trend Micro.
Infrastructure and Security Lead at Vedanta
Microsoft is quite affordable with a lot of features available for any size organization.
Solution Consultant at BIM Group of Companies
It is quite expensive and should be reconsidered.
Cyber Security Engineer at a tech services company with 11-50 employees
The setup cost was very cheap.
Network & Security Lead at Net-International
My experience with pricing, setup cost, and licensing for Trellix Collaboration Security is that pricing and setup were reasonable and licensing was straightforward.
Sr Network & System Engineer at a tech services company with 11-50 employees
 

Valuable Features

Microsoft Defender for Office 365 enhances security with AI-driven phishing detection and robust protection across Microsoft 365 services.
Trellix Collaboration Security offers comprehensive threat prevention and management with advanced features for enhanced protection and streamlined user experience.
It ranks the threats and allows us to prioritize those hitting us the hardest, such as email threats.
Technology support manager at Alfred State College
It provides end-to-end visibility on email threats such as phishing, extending beyond Exchange Online Protection.
Solution Consultant at BIM Group of Companies
The value of the DLP feature is significant to us because we have internal data, sometimes sensitive, and the users may not always be aware of security and privacy, which might lead them to send out information mistakenly to external parties.
Chief Architect at a tech vendor with 1,001-5,000 employees
Trellix Email Security protects at the gateway level, while Trellix Collaboration Security ensures protection from insider users and enhances cyber resilience.
Security Engineer at itsipl
This positive impact has led to measurable outcomes, such as threats being blocked automatically that could have caused real problems, and the team feels much safer using collaboration tools now than they did before.
Technical Specialist at VDA Infosolutions Pvt. Ltd.
One of the most valuable features is the protection against vulnerabilities, particularly through virtual patching.
Cyber Security Engineer at a tech services company with 11-50 employees
 

Categories and Ranking

Microsoft Defender for Offi...
Ranking in Email Security
2nd
Ranking in Secure Email Gateway (SEG)
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (3rd), Microsoft Security Suite (9th)
Trellix Collaboration Security
Ranking in Email Security
12th
Ranking in Secure Email Gateway (SEG)
7th
Average Rating
8.8
Reviews Sentiment
6.9
Number of Reviews
21
Ranking in other categories
Instant Communications Security and Compliance (2nd), AI Security (14th)
 

Mindshare comparison

As of August 2026, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 5.7%, down from 11.6% compared to the previous year. The mindshare of Trellix Collaboration Security is 2.4%, up from 1.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3655.7%
Trellix Collaboration Security2.4%
Other91.9%
Email Security
 

Featured Reviews

Emeka Ndulu - PeerSpot reviewer
Cloud Solutions Architect at a tech services company with 201-500 employees
Improves threat visibility and response while reducing manual tasks and training users against phishing
I appreciate the attack simulation feature whereby I get to train users and educate them on how to identify phishing emails and spam emails, as well as the anti-spam protection. It gives me visibility into my threat environment and threat landscape to ensure that I am one step ahead of any likelihood of threats within my environment. I get to detect it and respond, so the threat intelligence is very effective. Microsoft security solutions save my time. It saves money because once I protect my environment, I don't lose money. It has decreased my detection time and my time to respond.
Jorge Abalo - PeerSpot reviewer
Endpoint Security Analyst at BNP Paribas
Endpoint protection has strengthened network control and has simplified global threat response
In my opinion, the best features Trellix Collaboration Security offers include the firewall, the on-access scan, and the ability to obtain daily signatures for the latest malware. These daily signatures, referred to as content, ensure that we are protected against the most recent malware threats recognized by other companies. Another feature I particularly enjoy is the capability to maintain different locations that can communicate with the fabric, or DXL fabric as I refer to it, allowing me to create something akin to an EDR for immediate responses to resolve issues. The DXL fabric has helped my organization by enabling communication between different locations, such as one in Europe, another in South America, and one here. This fabric communicates with a broker that interacts with the TIE servers, which maintain the reputation of files, certificates, and known signatures from various regions including Europe, South America, and Canada. When something suspicious occurs, such as a certificate appearing malicious on an application, I can easily click and indicate that I trust this file, and through the fabric, I can apply an exclusion for that application across all locations simultaneously. Other features I find valuable include the SSO integration with Trellix EPO, specifically SAML SSO, allowing people not to have to manage usernames and passwords if they already utilize an SSO service for SAML; I consider this functionality to be quite beneficial.
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Use our free recommendation engine to learn which Email Security solutions are best for your needs.
909,725 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
11%
Manufacturing Company
9%
Financial Services Firm
9%
Comms Service Provider
7%
Construction Company
15%
Healthcare Company
13%
Comms Service Provider
9%
Manufacturing Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise11
Large Enterprise32
By reviewers
Company SizeCount
Small Business15
Midsize Enterprise7
Large Enterprise17
 

Questions from the Community

What is your experience regarding pricing and costs for Microsoft Defender for Office 365?
My experience with pricing, setup, and licensing is that it's actually quite reasonable even on the licensing side as a standalone product. It's very competitive compared to what competitors are ch...
What needs improvement with Microsoft Defender for Office 365?
I think Microsoft Defender for Office 365 can be improved by creating more educational pieces about not just looking for malware. We are seeing a lot more malware-less emails that Defender for Offi...
What is your primary use case for Microsoft Defender for Office 365?
My main use cases for Microsoft Defender for Office 365 include email hygiene.
What needs improvement with FireEye Email Security?
I believe no improvements are needed for Trellix Collaboration Security as we are already using more tools from Trellix. I don't think any improvements are necessary or there are features missing i...
What is your primary use case for FireEye Email Security?
My main use case for Trellix Collaboration Security is to protect our platforms like Slack, Microsoft Teams, Google Workspace, Drive, OneDrive, and Google Drive. With the help of Trellix Collaborat...
What advice do you have for others considering FireEye Email Security?
My advice for others looking into using Trellix Collaboration Security is to prevent insider threat vectors because a colleague may unknowingly share infected files. You need to be vigilant and ens...
 

Also Known As

MS Defender for Office 365
FireEye Email Security
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
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 Microsoft Defender for Office 365 vs. Trellix Collaboration Security and other solutions. Updated: August 2026.
909,725 professionals have used our research since 2012.