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Fortra's Clearswift Secure Email Gateway vs Sophos Email 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...
Sponsored
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
Sophos Email
Ranking in Email Security
9th
Average Rating
8.2
Reviews Sentiment
7.1
Number of Reviews
32
Ranking in other categories
Office 365 Protection (1st)
 

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 Sophos Email is 2.1%, down from 2.7% 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.
Ahmed_Fahmy - PeerSpot reviewer
Provides a powerful and simple email protection with proven management benefits
Sophos Email is integrated with Office 365 and Google Workspace. It offers anti-spam functionality, which is easy to manage and comes with documentation on how to integrate it with Office 365 and Google Workspace. It provides a defense layer for email protection, scanning every incoming and outbound email for malware and spam. It can also function temporarily as an email solution if my vendor from Office 365 or Google Workspace is out of service.

Quotes from Members

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

Pros

"The most valuable feature is protection against malicious links, fishing, and impersonation. You can train people to be aware of these threats, but they're not always careful. When they're using their phones between meetings, they click on a link, and it's game over."
"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."
"Some of the valuable features on the email side are anti-phishing, anti-malware, and Safe Links."
"Since we have started using the solution, there have been fewer compromises."
"Does a thorough job of examining email and URLs for malicious content."
"Scalability-wise, I do not think there are any issues so far."
"The initial setup was easy."
"The most valuable aspect of Microsoft Defender for Office 365 is its ability to protect us from malware."
"A stable solution."
"Ability to create your own content-filtering policies with relative ease."
"Sophos Email offers encryption and malware protection, provides visibility into emails, has 99% accuracy in catching spam, enhances organizational safety, integrates with various vendors like Microsoft, is deployable with any email service, prevents data loss, features authentication rules, synchronizes with Active Directory and Azure, and includes a self-service portal. The product is very flexible."
"The filtering capabilities are precious and far superior to others I've used. It's intuitive in what it pushes to quarantine, and users can quickly review, free, or delete items without needing an administrator, making it ideal for a multi-user environment."
"The tool's most valuable feature is the anti-spam detection filter. Its threat email intelligence features help to identify email data."
"I would recommend Sophos Email to both end-users and other entities that want to protect their emails."
"The feature of Sophos Email that we find most effective for detecting suspicious emails is primarily based on their signatures."
"It's easy to use and the configuration is straightforward."
"The deployment is very easy. It's quite straightforward."
"It is a stable solution...It is a scalable solution."
 

Cons

"Configuring the default strategies and policies in Microsoft Defender for Cloud Apps generates a lot of noise and false positives."
"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."
"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."
"Several simulation options are available within 365, and the phishing simulation could be better."
"In the areas of improvement for Microsoft Defender for Office 365, the console is the biggest challenge for me."
"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."
"The UI needs to be more user-friendly."
"Microsoft Defender for Office 365 should be more proactive."
"Malware needs improvement."
"FTP server and TRUST Manager functionality."
"The installation of Sophos Email could be easier. It's a bit difficult because setting up the email virtually requires some bit of technical knowledge."
"Servicing and support are areas with shortcomings where the solution needs to improve."
"Enhancing rule creation and customization features would provide users with greater control over their email security settings."
"The main drawback is regarding the technical support."
"Sophos Email does not work with split delivery. If I have a domain with 100 mailboxes and want to protect only 50, it is not recommended by Sophos or not possible to configure."
"Email installation could be more user-friendly so that it can be done without involving the partner"
"There have been some issues with compatibility and effectiveness, particularly when integrating it with our firewall. The main challenge has been email protection, especially due to compatibility issues and difficulties with log access and email relay configuration."
"It was sometimes hard to find the settings in the solution's interface."
 

Pricing and Cost Advice

"I was working in the government and it was too expensive for us to use our Microsoft products."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
"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."
"It's a user-base subscription."
"The pricing is normal. Considering its popularity, it's not overpriced."
"I know that the product is incredibly expensive."
"The license is expensive because the cost is based on the number of users."
"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."
Information not available
"The pricing is quite reasonable, with a fixed cost and no additional charges."
"The pricing is affordable, so I’d rate it around a four out of ten on the pricing scale. We pay about fifty pounds a month, including hardware so that costs may differ without it."
"I rate the product's pricing a seven out of ten."
"Most of our clients are on a perpetual license. If there is a budget issue, they can choose a subscription. However, most of the clients choose the perpetual license."
"Sophos Email is a little expensive for us, but it's necessary. We have a subscription and renew it every three years."
"The pricing is fair."
"Licensing is paid on a yearly basis."
"We use exchange licenses, for which we get immediate support from Sophos."
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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
10%
Comms Service Provider
7%
Financial Services Firm
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...
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What do you like most about Sophos Email?
The solution's identity proxy feature is very good and reliable.
What is your experience regarding pricing and costs for Sophos Email?
Sophos Email pricing is a bit high, especially since I purchase through a partner, and they sell it at a higher price...
What needs improvement with Sophos Email?
Sophos Email does not work with split delivery. If I have a domain with 100 mailboxes and want to protect only 50, it...
 

Also Known As

MS Defender for Office 365
No data available
Sophos Email Security
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Information Not Available
Del Monte Foods, Terra Verde, spicerhaart, RIVERLITE, Dataprise, SureBridge, Reed's School, Sayfol International School
Find out what your peers are saying about Fortra's Clearswift Secure Email Gateway vs. Sophos Email and other solutions. Updated: June 2025.
858,469 professionals have used our research since 2012.