Try our new research platform with insights from 80,000+ expert users

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
52
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
7.1
Number of Reviews
52
Ranking in other categories
Email Archiving (1st), Email Security (1st), Advanced Threat Protection (ATP) (1st), Microsoft Security Suite (11th)
 

Mindshare comparison

As of May 2025, in the Secure Email Gateway (SEG) category, the mindshare of Barracuda Email Security Gateway is 6.4%, down from 8.5% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 29.5%, down from 39.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Secure Email Gateway (SEG)
 

Featured Reviews

Mohammed Shah Newaj - PeerSpot reviewer
Instantly blocked and reduced our spam emails
The solution has to improve in a very specific way. When we allow our customers to send or scan email through our Barracuda Email Security Gateway, we are permitting their email server IP address, but not any domain. One of our customers has an email server where they are hosting five domains within their server. They are sending and receiving email through that server by using Barracuda Email Security Gateway. Therefore, we allow their IP address to send email through our Barracuda Email Security Gateway, then we declare MX for receiving email on behalf of our customers. After receiving the email, we deliver it to the specific IP address of the customer. Since we are only allowing the IP address, if an incident happens within a customer's email server or an email server gets compromised, then it starts sending spam. That creates a huge problem for the solution as it allows all emails because the customer's IP address is allowed to relay email through our Barracuda Email Security Gateway. 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.
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

"Barracuda Email Security Gateway has a good feature of email spooling, which acts as a first line of security."
"The most valuable feature of the Barracuda Email Security Gateway is the cloud ATP functionality not available on the on-premise version. Most of the zero-day attacks can be mitigated with ATP. Additionally, the reporting functionality is good."
"Barracuda is good at keeping the garbage from reaching your inbox."
"The spam filtering, in particular, is very important for us. We have a large volume of emails each month, something like 200,000, and Barracuda filters about 85 percent of the spam, malware, and phishing that comes in. It prevents our users from receiving this content on their computers."
"The feature that sets Barracuda apart from other solutions is the Office 365 cloud-to-cloud backup."
"I like Barracuda's cloud sandbox feature."
"With the cloud service, one of the nice things about Barracuda is the quarantine service. It gives the ability for our users to go in and check what has been quarantined, and then connect with our IT staff to release anything that should be fine so that we can test it before we release."
"Before this solution, we didn't have any separate feature for protecting our emails. We used to only have a firewall but now we have email security. It has a graphical interface and we can see the log every time. We can see that the performance is fine."
"The DLP feature of Microsoft Defender for Office 365 is valuable, and we also use the DLP feature for email real-time detection."
"The most valuable aspect of Microsoft Defender for Office 365 is its ability to protect us from malware."
"Defender helps us prioritize threats across our organization."
"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."
"There are several features that I consider valuable."
"The initial setup was easy."
"At the moment we are satisfied with this product. It's a stable, scalable, and resilient solution for us."
"The initial setup is straightforward. You just add the license, click it, and then you can set up the rules. It is quite simple."
 

Cons

"Barracuda Email Security Gateway can improve email detection. We have some emails that are bypassing the threat scanning. There are some impersonation emails passing through."
"Barracuda's spam database isn't on par with its competitors. Users complain about the spam email they're receiving, and we report the issue. Barracuda said they are going to update their system to block the malicious email we received, but we're still getting the same spam. The signatures are not in their database. They need to update their spam signatures because spam is bypassing Barracuda."
"Barracuda Email Security Gateway should add auto-remediation to improve the solution. Additionally, there are times when we have false positives and our general emails get locked, we have mentioned this to Barracuda."
"The dashboard's UI could be improved to make changes to the blocklist."
"Two improvements that are needed include an enhancement in the proxy feature, as well as the ability to more fully automate patches and updates."
"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."
"We had an incident where we didn't want to receive any emails or spam from a certain site and email address. We selected the mail ID, and we send it to Barracuda for analysis to see if it's spam or something like that. As of now, we haven't gotten any update or notification as to what happened with it."
"Barracuda has shown difficulty in providing us with the solutions we sought."
"The custom alerts have to improve a lot."
"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."
"There needs to be an improvement in integrating the product to work across multiple operating systems, and to have better support for non-Microsoft file types."
"Configuration requires going to a lot of places rather than just accessing one tab."
"Specifically, within Microsoft Defender for Office 365, I want it to improve the DLP capabilities."
"The XDR dashboard has room for improvement."
"This product's effectiveness could be improved, in terms of detecting unwanted spam or even malware between the emails, compared to other products."
"Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published."
 

Pricing and Cost Advice

"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 price of Barracuda Email Security Gateway is approximately $17 per user annually."
"We have a long agreement with Barracuda Email Security Gateway. We're very pleased with the cost and the solution. The cost is in the average range for this type of solution."
"The price of the solution should be reduced. The price in the USA is less than where we are. Our local distributor of the solution is manipulating the market."
"e solution's pricing is exceedingly high, and it continues to increase."
"The price of this solution is very high, but it's working fine."
"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 paid for an annual license."
"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 for 365 comes in various plans and licenses, along with other Microsoft security solutions. Purchasing this kind of package or security bundle gives good value for money, and that's what I recommend."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
"I was working in the government and it was too expensive for us to use our Microsoft products."
"The pricing is normal. Considering its popularity, it's not overpriced."
"The license is expensive because the cost is based on the number of users."
"The pricing has become expensive."
"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."
report
Use our free recommendation engine to learn which Secure Email Gateway (SEG) solutions are best for your needs.
851,604 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Educational Organization
48%
Computer Software Company
8%
Financial Services Firm
5%
Manufacturing Company
4%
Computer Software Company
16%
Financial Services Firm
9%
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: April 2025.
851,604 professionals have used our research since 2012.