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Microsoft Defender for Office 365 vs Trellix Advanced Threat Defense comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Dec 1, 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

Microsoft Defender for Offi...
Ranking in Advanced Threat Protection (ATP)
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Archiving (1st), Email Security (2nd), Microsoft Security Suite (8th), Secure Email Gateway (SEG) (2nd)
Trellix Advanced Threat Def...
Ranking in Advanced Threat Protection (ATP)
23rd
Average Rating
7.8
Reviews Sentiment
5.6
Number of Reviews
9
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of June 2026, in the Advanced Threat Protection (ATP) category, the mindshare of Microsoft Defender for Office 365 is 6.5%, down from 14.6% compared to the previous year. The mindshare of Trellix Advanced Threat Defense is 2.0%, up from 1.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Advanced Threat Protection (ATP) Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3656.5%
Trellix Advanced Threat Defense2.0%
Other91.5%
Advanced Threat Protection (ATP)
 

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.
PP
RSSI at SDIS49
Ensuring long-term reliability while seeking internal email management enhancements
Prisma is a commercial name of the firewall now, but we don't work with the cloud product. Only our company is using it and we do not recommend it to customers. For us, it's transparent because it's a cloud product, so we don't really know the version as it's always updated. We have not had any problem, but it's difficult to report on what's going on because some days they can wash out perhaps 100 mails, and then it's difficult to say how many attacks you have reached. The right email has been washed out and then nobody has complained. We do not use the Threat Visualization feature; as we are in MX, the mail is washed out before it is in the mail inbox of the user, thus avoiding any problem requiring a reservation. In fact, there is no integration with existing security frameworks. The only problem we can have is that as we have no API interface, there is no inspection of internal mail. I rate Trellix Advanced Threat Defense a nine out of ten.

Quotes from Members

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

Pros

"The most valuable feature of Microsoft Defender for Office 365 is the ease of use."
"Defender is a SaaS platform, so it offers more flexibility. Managing the permissions is easier. The solution's automated detection and response features are scalable."
"One of our clients didn't have the budget to invest in a SOC team, but we deployed the solution for them, and they now run a SOC with only one analyst."
"Overall, I would rate Microsoft Defender for Office 365 at a ten."
"There are several features that I consider valuable."
"I would say that 90% of the spam and phishing attack emails get blocked right off the bat."
"The coolest feature of Microsoft Defender for Office 365 is its ability to look for phishing emails."
"The stability of Microsoft Defender for Office 365 is fantastic."
"I recommend this solution because of its ease of use."
"The features I find most valuable are: the management, the ability for automatic remediation of threats and it can successfully detect a threat, and to act upon it."
"Its greatest strength is the DXL client which can rapidly disseminate attack information to all clients via the McAfee Agent instead of going through the ePO server."
"I see ROI, as it stops in excess of twenty-five malware events per month, all of which could be critical to the business."
"Provides good exfiltration, and is an all-in-one product."
"If a system admin can put in the patience to read and constantly update the ePO system in terms of rules, enforcing them at regular intervals, you can safely go to sleep every night."
"It was easy to set up initially."
"The most valuable features are the administration console and its detection and response module."
 

Cons

"From a development point of view, if I wanted to do development on my actual machine where Defender is, the organization can set certain policies or Defender makes that prohibitive."
"The visibility for the weaknesses in the system and unauthorized access can be improved."
"Microsoft Defender for Office 365 must improve the overall management style, including the GUI. It also needs to change the filters so that it is easy to whitelist and blacklist data."
"Microsoft Defender for Office 365 could improve by giving customers information on techniques to prevent threats. For example, information about best practices on how to protect their own devices against hackers and scammers, such as educational information or training. This would help others have a better understanding of cyber security. Additionally, there can be more security features added."
"The cost of Security Copilot is up there right now, and I think it needs to come down for more people to adopt."
"They have moved features from one console to another. Things have been moved around in the interface and it takes me time to find where certain features are."
"One area for improvement is integration. For example, when it comes to external SaaS platforms, we were not able to get a lot of information on integrations with such apps for security and authentication."
"The only thing they should improve is the licensing model. They should stop changing it. A year ago, the five features I mentioned were included in one product. Now, three of them are bundled into one product, and you have to pay extra for the other two. I don't mind paying extra, but I don't want them to change it every year or every six months. I need to know what I'm looking at and not worry about it next year."
"Lacks remote capabilities not dependent on the internet."
"It was not complex, but there are things to look out for, because it's an intense product. It scans intensely and there are major obstacles to overcome if it scans while users are using a network, then it is not a good thing."
"The support on their side is not readily available. It takes a while."
"Some of our customers have mentioned the lack of a tool that would allow for remote capabilities without being attached to the internet."
"The only problem we can have is that as we have no API interface, there is no inspection of internal mail."
"This solution needs to be made "cloud ready"."
"I would like to see future versions of the solution incorporate artificial intelligence technology."
"This product does the job, but it is not flexible enough to do new environments yet."
 

Pricing and Cost Advice

"The license is expensive because the cost is based on the number of users."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"The pricing has become expensive."
"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"While Microsoft Defender for Office 365 necessitates pricier E3 or E5 subscriptions, the extensive functionality offered by these licenses across various Microsoft products justifies the investment."
"Defender is a little bit more expensive as compared to others. We are in the manufacturing environment. So, we don't have a high budget for all of our endpoint devices. Its cost is a major concern for us."
"The product is very expensive."
"The pricing is normal. Considering its popularity, it's not overpriced."
"The product is expensive, but it is better than the rest of them in the industry."
"Our licensing fees for this solution are approximately one million dollars per year."
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Top Industries

By visitors reading reviews
Computer Software Company
12%
Manufacturing Company
9%
Financial Services Firm
9%
Comms Service Provider
7%
Construction Company
17%
Financial Services Firm
12%
Comms Service Provider
10%
Outsourcing Company
10%
 

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 Business3
Midsize Enterprise4
Large Enterprise5
 

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 McAfee Advanced Threat Defense?
I would like to see an API interface for internal email and control of outgoing email to make it closer to 10. It's necessary; today we have an MX interface, and it would be interesting to have an ...
What is your primary use case for McAfee Advanced Threat Defense?
We are working with Palo Alto products, specifically firewalls. We are only using Palo Alto Firewalls and not Cortex. With FireEye and Trellix, we only work with ETP now because the NDR function wh...
What advice do you have for others considering McAfee Advanced Threat Defense?
Prisma is a commercial name of the firewall now, but we don't work with the cloud product. Only our company is using it and we do not recommend it to customers. For us, it's transparent because it'...
 

Also Known As

MS Defender for Office 365
McAfee Advanced Threat Defense
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
The Radicati Group, Florida International University, MGM Resorts International, County Durham andDarlington NHS Foundation Trust
Find out what your peers are saying about Microsoft Defender for Office 365 vs. Trellix Advanced Threat Defense and other solutions. Updated: June 2026.
902,456 professionals have used our research since 2012.