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Barracuda Email Security Gateway vs Microsoft Defender for Office 365 comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Apr 20, 2025

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

Barracuda Email Security Ga...
Ranking in Secure Email Gateway (SEG)
5th
Average Rating
8.0
Reviews Sentiment
7.6
Number of Reviews
54
Ranking in other categories
DMARC Authentication Software (4th)
Microsoft Defender for Offi...
Ranking in Secure Email Gateway (SEG)
1st
Average Rating
8.4
Reviews Sentiment
7.0
Number of Reviews
52
Ranking in other categories
Email Archiving (1st), Email Security (1st), Advanced Threat Protection (ATP) (2nd), Microsoft Security Suite (10th)
 

Mindshare comparison

As of July 2025, in the Secure Email Gateway (SEG) category, the mindshare of Barracuda Email Security Gateway is 6.2%, down from 8.6% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 28.5%, down from 37.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG)
 

Featured Reviews

RobertSmith15 - PeerSpot reviewer
Email security offers superior protection with good personalization
I have experienced the Barracuda team as very cooperative, and they are readily available for calls with technical support via email. I have had no issues with ongoing support throughout the product's lifecycle. Assistance was provided to me when transferring archived information from a legacy email service. They also recommended an additional service to streamline the process, making it as easy as possible.
Tolu Omolaja - PeerSpot reviewer
Great URL scanning and attachment scanning, but I would like more proactive threat analysis
The two main features that prove most beneficial for us are URL scanning and attachment scanning. URL scanning involves an automatic scan of links and emails. When a user clicks on a link within an email, the system promptly checks the link's safety. If the link is deemed safe, access is granted automatically. However, if it is flagged as unsafe, we receive feedback and notification to caution us about the potentially harmful link. At this point, we are presented with the option to proceed or return. I have personally witnessed the system identify a few unsafe links, making this the primary advantage of using the solution. The second crucial aspect is the scanning of attachments. When an email containing an attachment arrives, we receive a notification of the new email, along with information that the attachment is being scanned for threats. This additional layer of security provides peace of mind for our organization. While Microsoft Defender for Office 365 offers numerous features, these two stand out as particularly impressive and valuable to us.

Quotes from Members

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

Pros

"Customer support is the solution's strongest point."
"The security protection is the best and it's GUI is user-friendly."
"It can scale."
"The most important features of Barracuda Email Security Gateway are the simple and quick configuration, interactive console, and easy-to-understand logs."
"All features it provides on the cloud environment are very, very useful, including the antivirus that is enabled on it."
"This product is powerful and quite simple to use."
"It is lightweight, and we can filter all of our inbound and outbound emails. We have controls for rate control, quarantine, and tagging. We can see whether an email is a spam email or a phishing email."
"The solution is scalable."
"The benefit that stands out to me is the ability for multiple individuals to collaborate simultaneously within the same document. Additionally, there is the option to save the document directly in the integrated OneDrive or SharePoint."
"The stability of Microsoft Defender for Office 365 is fantastic."
"The most valuable aspect of Microsoft Defender for Office 365 is its ability to protect us from malware."
"Since we have started using the solution, there have been fewer compromises."
"The most valuable feature is the integration. It's a single console, so we don't have to switch around between multiple products. Another valuable feature is the ease of operations and maintenance."
"Defender for 365 is a comprehensive cloud-based solution. The value of the cloud is that you aren't alone. Threat intelligence and analytics are shared in the cloud. We don't have to find the solution alone. If you face an unknown threat with traditional solutions like Trend Micro and Symantec, you need to open a case and send your information to them to analyze forensically and identify the source of the attack."
"The most valuable feature of Microsoft Defender for Office 365 is the ease of use."
"Safe attachments, safe links, policies, and the ability to protect from zero-day threats are the most valuable features."
 

Cons

"Artificial intelligence improvement could be used to help block spam and phishing mail that is directly delivered to users."
"Barracuda should add an option where it can add multiple domains, such as abc.com, bbc.com, and cbc.com. Therefore, this domains' emails will be allowed and other domains' emails will not be relayed through Barracuda Email Security Gateway. Whereas, if you allow the IP address, then any of the domain's emails will be relayed through Barracuda Email Security Gateway. That is the drawback that I have observed. So, Barracuda should work on this."
"Barracuda Email Security Gateway should include ATP in the next release."
"Barracuda isn't catching everything. We're still getting quite a few phishing emails, so we're looking for something else."
"My customers were sending OPT bulk emails and Barracuda Email Security Gateway was not able to handle it. We have to go with another different solution, such FortiMail for the task. We are implementing these combinations of the Barracuda and FortiGate, for email security. The FortiGate FortiMail security gateway we use to send only the bulk email, not for receiving emails."
"The reporting can be improved."
"Barracuda should have a sandbox feature in the appliances."
"The UI could be a little cleaner and require less clicking around in different modules. They give the illusion of a single pane of glass, but as you click around to different products, you're actually being transferred into a different system."
"Specifically, within Microsoft Defender for Office 365, I want it to improve the DLP capabilities."
"One area for improvement is support, in terms of being able to reach them and, especially, technical support for configuration."
"Several simulation options are available within 365, and the phishing simulation could be better."
"The custom alerts have to improve a lot."
"The UI needs to be more user-friendly."
"Microsoft Defender for Office 365 should improve the troubleshooting tools. It's unclear whether the device is blocked at the firewall level or at the device itself. The granularity needed for troubleshooting is currently lacking. From my perspective, Microsoft should address this issue to benefit many users who likely share the same sentiment."
"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."
"Microsoft wants its well-paying customers to finish testing some of its half-baked products, find bugs, and report bugs back to Microsoft's team, which is a little frustrating for those who have to manage it and roll it up to thousands of people across the organization."
 

Pricing and Cost Advice

"Barracuda Email Security Gateway is a cost-effective solution."
"We find the solution's pricing okay."
"For overall value and cost, Barracuda came in as most appropriate, price as well as services provided. In terms of price, it's average . It's not the most expensive, it's not the least expensive but it works well."
"This is one of the major points for integrating this solution in any organization. Barracuda Email Security Gateway needs to make it a bit more tolerable for customers because it is increasing every year. They should create a plan for reducing the cost."
"We pay between $8 and $10 USD per user per month."
"The solution is priced low. We have received a good price discount here in Sri Lanka. There are additional licenses we have to purchase a license for the ATP."
"Barracuda has the best price. Every year we need to renew our license, and every year I need to compare Barracuda to two or three other players in the market. Barracuda always has a price that is 30 to 40 percent less than the other players' prices."
"The licensing fees are part of a bundled support package that we pay for."
"I know that the product is incredibly expensive."
"The pricing is normal. Considering its popularity, it's not overpriced."
"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"The product is very expensive."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
"It is much more expensive than using another solution because we have had to include some options and upgrade our license."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
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Top Industries

By visitors reading reviews
Educational Organization
21%
Computer Software Company
12%
Financial Services Firm
8%
Manufacturing Company
7%
Computer Software Company
16%
Financial Services Firm
8%
Manufacturing Company
8%
Government
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

What do you like most about Barracuda Email Security Gateway?
Barracuda Email Security Gateway is very simple to use.
What needs improvement with Barracuda Email Security Gateway?
Barracuda Email Security Gateway should include ATP in the next release.
What do you like most about Microsoft Defender for Office 365?
Threat Explorer is an invaluable tool for me, and it plays a crucial role in helping me discern the origins of various email campaigns, pinpointing where they emanate from, and identifying the indi...
What is your experience regarding pricing and costs for Microsoft Defender for Office 365?
Microsoft is quite affordable with a lot of features available for any size organization.
What needs improvement with Microsoft Defender for Office 365?
Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published. It's essential to enhan...
 

Also Known As

Barracuda Spam and Virus Firewall, Barracuda Sentinel
MS Defender for Office 365
 

Overview

 

Sample Customers

Evolution Recruitment Solutions, Evans Delivery Company, Osoyoos Credit Union, Synovis Life Technologies, Camden County Technical Schools, DEK, Evans Delivery Company, Colgate Rochester Crozer, Hemmera, South Carolina Heart Center, Ferma Corporation, Major League Baseball (MLB), Healy Brothers Automotive Group
Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Find out what your peers are saying about Barracuda Email Security Gateway vs. Microsoft Defender for Office 365 and other solutions. Updated: June 2025.
861,390 professionals have used our research since 2012.