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Barracuda Email Protection vs Fortra's Clearswift Secure Email Gateway comparison

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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:
 

Categories and Ranking

Microsoft Defender for Offi...
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Ranking in Email Security
1st
Average Rating
8.4
Reviews Sentiment
7.0
Number of Reviews
52
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (2nd), Microsoft Security Suite (10th), Secure Email Gateway (SEG) (1st)
Barracuda Email Protection
Ranking in Email Security
15th
Average Rating
8.8
Reviews Sentiment
7.2
Number of Reviews
18
Ranking in other categories
Email Archiving (2nd), Office 365 Protection (5th)
Fortra's Clearswift Secure ...
Ranking in Email Security
40th
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
0
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 12.3%, down from 16.9% compared to the previous year. The mindshare of Barracuda Email Protection is 3.0%, up from 1.7% compared to the previous year. The mindshare of Fortra's Clearswift Secure Email Gateway is 0.8%, up from 0.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security
 

Featured Reviews

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.
LeeMiles - PeerSpot reviewer
Very good threat protection, spam filtering, and cloud backups
Considering it integrates with Azure, I would like to be able to effectively set up policies where people are by default included in certain settings. For instance, for email quarantine, I can't set up a global setting. Users must go through an induction session where I guide them in configuring quarantine alerts rather than having default settings based on group membership. This seems like an oversight since they already use Active Directory details. They should assign policies based on group membership, which configures these settings by default.
PC
Stable, but malware needs improvement and customer support is poor
They need to improve the malware in the product. I am not satisfied with Clearswift because of the lack of customer support. The support is poor, the supplier takes a lot of time and it's expensive. We have some issues here when I contact the supplier, it takes a lot of time for them to get back to us but there's no solution. I am now looking at Symantec as a possible alternative.

Quotes from Members

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

Pros

"The DLP feature of Microsoft Defender for Office 365 is valuable, and we also use the DLP feature for email real-time detection."
"Microsoft Defender has a feature to protect each and every attachment. Even if it's an encrypted attachment, it will check for any potential threats."
"Our customers are satisfied with Defender for 365 because Microsoft products are easy to use and customize to meet the client's needs. Everything is in one place, so we can adjust policies as needed for phishing, DLP, ATP, or any other security features that our clients want to apply."
"The product's scalability is good."
"Microsoft Defender for Office 365 helps people to work remotely. It is a secure solution. We don't need to use our company's computers or get VPN connections to the networks. I can control how they share screens and what they send to the devices. It keeps our organizations confidential and sensitive information safe."
"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 individuals within our organization who are affected."
"Defender helps us prioritize threats across our organization."
"The two main features that prove most beneficial for us are URL scanning and attachment scanning."
"The most valuable features are security and ease of use."
"I'm quite satisfied with the graphical user interface for Barracuda products."
"We check the reports sometimes to see that frequent attacks and malicious emails are being blocked by the solution."
"When we got the service, it included the email archiver with unlimited storage."
"The most valuable features of Barracuda Essentials are it's a trusted name and is rated very high on review sites. It blocks high percentages of spam and junk email and it's in the cloud. They have hardware appliances, but this is in the cloud. The solution is very effective at blocking malware and blocking spam and this is what we are looking for. There's not a whole lot of complexity, you want a solution that is very good at blocking out all of the unwanted emails."
"The product is easy to deploy and maintain."
"The best feature of Barracuda Email Protection is that it provides protection for Microsoft 365."
"The archiving and search features are very good."
"A stable solution."
"Ability to create your own content-filtering policies with relative ease."
 

Cons

"We still see many false positives from time to time with Microsoft Defender for Office 365, so it would be good if we can reduce those false positives and provide better workflows for our end users, as sometimes they may not know what to do when they encounter a false positive."
"I'd like some additional features any product can give me to protect our environment in a better way."
"Microsoft needs to broaden its global support presence by establishing teams of subject-matter experts in all regions."
"Sometimes, phishing emails manage to pass through the filter, so the system needs to enhance its phishing email detection capabilities."
"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."
"We need to be able to whitelist data at the backend."
"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."
"Barracuda Essentials can improve by continually adding more features."
"There is room for improvement, particularly in reaching out to technical support during deployment."
"Two to three months back, we got fraudulent emails in which someone in the organization was being blamed."
"The policies are set up in Barracuda by default; we don't have any control over them."
"Sometimes it is somewhat laggy, especially on the Archiver side. It should have improved performance on their Message Archiver."
"They could simplify the licensing and the pricing."
"The technology works on a supervised engine, but it would be better if it ran on an unsupervised engine."
"The customer service and support could be improved if the support were available directly in Europe. Currently, the support is often managed from India, so we sometimes need to wait due to the time zone difference. It would be quicker and better if the support were provided by European staff."
"Malware needs improvement."
"FTP server and TRUST Manager functionality."
 

Pricing and Cost Advice

"The pricing is normal. Considering its popularity, it's not overpriced."
"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."
"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."
"The product is expensive."
"The license is expensive because the cost is based on the number of users."
"I know that the product is incredibly expensive."
"The product is very expensive."
"On a scale from one to ten, where one is cheap, and ten is expensive, I rate the solution's pricing a seven out of ten."
"Barracuda licensing model is good."
"The solution's pricing is moderate, where it is neither cheap nor expensive."
"The price of Barracuda Essentials is better than some of the competing products."
"Despite a list price possibly around $40 per user, their market price allows customers to easily buy the solution."
"The product is expensive."
"Price-wise, this product is middle-of-the-road."
"The price is similar to that of Microsoft 365."
Information not available
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
9%
Manufacturing Company
8%
Government
6%
Computer Software Company
19%
Construction Company
8%
Manufacturing Company
7%
University
6%
Computer Software Company
24%
Financial Services Firm
16%
Government
10%
Comms Service Provider
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

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 variou...
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 recor...
What do you like most about Barracuda Email Protection?
Barracuda Email Protection is easy to deploy and maintain. It doesn't require a specialized resource to manage this t...
What is your experience regarding pricing and costs for Barracuda Email Protection?
Their list price is too high, but in India, the selling price is affordable at around $10 per user per year. Despite ...
What needs improvement with Barracuda Email Protection?
Considering it integrates with Azure, I would like to be able to effectively set up policies where people are by defa...
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Also Known As

MS Defender for Office 365
Barracuda Essentials
No data available
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
ACT Government, Acumen Group, AGIP, Delta Dental Plans Association, Desai/Nasr Consulting Engineers, Inc., Equinox Information Systems
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Find out what your peers are saying about Barracuda Email Protection vs. Fortra's Clearswift Secure Email Gateway and other solutions. Updated: June 2025.
860,168 professionals have used our research since 2012.