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Fortra's Clearswift Secure Email Gateway vs SonicWall Email Security 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
7.1
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)
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
SonicWall Email Security
Ranking in Email Security
35th
Average Rating
7.6
Reviews Sentiment
6.8
Number of Reviews
13
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of June 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 12.6%, down from 17.6% 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. The mindshare of SonicWall Email Security is 0.5%, down from 0.6% 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.
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.
Constantnos Achilleos - PeerSpot reviewer
Provides strong email filtering and threat intelligence but pricing needs improvement
I work with SonicWall Email Security SonicWall Email Security uses multi-layer cloud security. It filters emails before they come to my provider, such as Office 365. It has real-time threat intelligence and provides strong data loss prevention. Additionally, it filters emails before they reach my…

Quotes from Members

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

Pros

"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."
"The initial setup was easy."
"The most valuable aspect of Microsoft Defender for Office 365 is its ability to protect us from malware."
"At the moment we are satisfied with this product. It's a stable, scalable, and resilient solution for us."
"Some of the valuable features on the email side are anti-phishing, anti-malware, and Safe Links."
"Safe attachments, safe links, policies, and the ability to protect from zero-day threats are the most valuable features."
"Overall, I would rate Microsoft Defender for Office 365 at a ten."
"Ability to create your own content-filtering policies with relative ease."
"A stable solution."
"It is a very scalable solution."
"SonicWall Email Security uses multi-layer cloud security."
"The most valuable features are the anti-spam, anti-phishing, anti-virus, and anti-spoofing."
"The most valuable feature is that it protects from spam."
"The product is easy to manage in terms of configurations."
"There are no wasted extras and the interface is really simple."
"SonicWall Email Security uses multi-layer cloud security."
"The most valuable feature of SonicWall Email Security is the blocking of emails using keywords. If there are any particular keywords in the subject, that we want to block from receiving from a particular person we can do it. Additionally, the blocking of emails is easy. we can release that one and we can block some of the keywords also like that."
 

Cons

"One area for improvement is support, in terms of being able to reach them and, especially, technical support for configuration."
"The GUI is sometimes slow to fetch the device report and could be improved."
"The XDR dashboard has room for improvement."
"Microsoft should provide more documentation for users so they can self-educate. I would like to see more documentation for advanced security features."
"Microsoft Defender for Office 365's Mac functionality requires improvement to deliver the same level of protection found on Windows devices."
"The certification training for Defender for 365 needs to be deeper and incorporate Sentinel. I took all the security courses except one, and Sentinel isn't included."
"The custom alerts have to improve a lot."
"Configuration at the mid-level could be improved for the support team."
"Malware needs improvement."
"FTP server and TRUST Manager functionality."
"There could be definition updates included in the subscription."
"A lot of spoofed emails are still coming to the end-user, so the configuration for this option needs to be improved."
"They should integrate the solution with third-party platforms."
"Updates could be released more frequently."
"The protection level for email security isn't 100%. I'm still getting some spam and junk mail."
"SonicWall Email Security could improve by making the file blocking and the release feature easier to use"
"We would like to see more information on a dashboard about what is happening when it comes to spamming and malware."
"The pricing could be improved."
 

Pricing and Cost Advice

"It's a user-base subscription."
"I know that the product is incredibly expensive."
"I was working in the government and it was too expensive for us to use our Microsoft products."
"The license is expensive because the cost is based on the number of users."
"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."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
Information not available
"We have a two-year license subscription and the price is very high."
"The cost is cheaper than Sophos. I would rate it as five out of ten."
"The overall price of SonicWall Email Security should be reduced and there should be an option to purchase one or two licenses more instead of their current policy of bulk increases only. There should be more flexibility in the licensing model. Each license cost approximately $33 annually."
"When compared with Cisco, it is very well priced. Cisco is very expensive."
"Our customers purchase the solution's yearly license."
"I rate the application’s pricing a five out of ten."
"The platform offers a yearly license."
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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
24%
Financial Services Firm
15%
Government
10%
Comms Service Provider
6%
Computer Software Company
14%
Manufacturing Company
11%
Financial Services Firm
10%
Construction Company
9%
 

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...
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What do you like most about SonicWall Email Security?
According to our customers, the product's most valuable feature is the ability to detect spam and reduce phishing ema...
 

Also Known As

MS Defender for Office 365
No data available
Dell SonicWALL Email Security Platform, SonicWall Hosted Email Security
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Information Not Available
Star Kay White, Locala Community Partnerships
Find out what your peers are saying about Fortra's Clearswift Secure Email Gateway vs. SonicWall Email Security and other solutions. Updated: June 2025.
858,469 professionals have used our research since 2012.