No more typing reviews! Try our Samantha, our new voice AI agent.

Microsoft Defender for Office 365 vs Trustwave Secure Email Gateway comparison

Why PeerSpot?
 

Comparison Buyer's Guide

Executive Summary

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 Secure Email Gateway (SEG)
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Archiving (1st), Email Security (2nd), Advanced Threat Protection (ATP) (3rd), Microsoft Security Suite (9th)
Trustwave Secure Email Gateway
Ranking in Secure Email Gateway (SEG)
15th
Average Rating
7.0
Reviews Sentiment
7.0
Number of Reviews
2
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2026, in the Secure Email Gateway (SEG) category, the mindshare of Microsoft Defender for Office 365 is 14.8%, down from 28.2% compared to the previous year. The mindshare of Trustwave Secure Email Gateway is 1.5%, up from 0.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG) Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 36514.8%
Trustwave Secure Email Gateway1.5%
Other83.7%
Secure Email Gateway (SEG)
 

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.
FA
Cloud & Systems Admin at Service Management Group, Inc.
Offers clear vision on the clear side of what is being blocked and easy to use but a bit old-fashioned GUI
I would rate my experience with the initial setup a four out of ten when one is difficult, and ten is easy. It's difficult initially since it's an on-premise solution. So it's a bit difficult. So the initial assessment took a few days, and then the deployment was a couple of days. It is on-prem. That is also one of the improvements you need to make on the cloud. Most of the people like things to be on the cloud. You don't have the burden of setting up things on-premise.

Quotes from Members

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

Pros

"The stability of Microsoft Defender for Office 365 is fantastic."
"At the moment we are satisfied with this product. It's a stable, scalable, and resilient solution for us."
"Overall, I would rate Microsoft Defender for Office 365 at a ten."
"The most valuable aspect of Microsoft Defender for Office 365 is its ability to protect us from malware."
"Microsoft Defender for Office 365 saves me time; it does save a lot of time, especially with the automation."
"The ability to respond to threats if very important."
"The deployment capability is a great feature, and we're able to activate this feature throughout France with a click."
"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."
"I like that it doesn't hold emails for any reason; it sends out notifications to the user as well as administrators. So we have a clear vision on the clear side of what is being blocked and in time as well."
"The product's most valuable features are spam protection and artificial intelligence."
 

Cons

"Several simulation options are available within 365, and the phishing simulation could be better."
"To improve Microsoft Defender for Office 365, it would be nice to have more accessibility for users to see on their end what they are doing that could cause a threat."
"I am generally satisfied with how it currently is. If I could improve anything, I would reduce the cost."
"Sometimes I have to recategorize things when it takes the wrong step and I do not want it to classify something as suspicious."
"I assess the stability and reliability of the solution as seven out of ten."
"The custom alerts have to improve a lot."
"Microsoft needs to broaden its global support presence by establishing teams of subject-matter experts in all regions."
"One area for improvement is support, in terms of being able to reach them and, especially, technical support for configuration."
"There is room for improvement in GUI because it is a bit old-fashioned."
"The technical support services and stability need improvement as well."
 

Pricing and Cost Advice

"It's a user-base subscription."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."
"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."
"I know that the product is incredibly expensive."
"The product is very expensive."
"The license is expensive because the cost is based on the number of users."
"I was working in the government and it was too expensive for us to use our Microsoft products."
"The pricing is in the middle. Compared to other products, it should be five out of ten, where one is cheap and ten is expensive."
"It is a cost-effective product."
report
Use our free recommendation engine to learn which Secure Email Gateway (SEG) solutions are best for your needs.
911,493 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%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise11
Large Enterprise32
No data available
 

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.
Ask a question
Earn 20 points
 

Also Known As

MS Defender for Office 365
Trustwave SEG
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Information Not Available
Find out what your peers are saying about Microsoft Defender for Office 365 vs. Trustwave Secure Email Gateway and other solutions. Updated: August 2026.
911,493 professionals have used our research since 2012.