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Microsoft Defender for Office 365 vs SonicWall Email Security comparison

 

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...
Ranking in Email Security
1st
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
53
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (2nd), Microsoft Security Suite (10th), Secure Email Gateway (SEG) (1st)
SonicWall Email Security
Ranking in Email Security
36th
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 August 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 12.1%, down from 16.1% 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.
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

"The ability to respond to threats if very important."
"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 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."
"Some of the valuable features on the email side are anti-phishing, anti-malware, and Safe Links."
"The product's scalability is good."
"Microsoft Defender for Office 365 facilitates efficient management and updates through the cloud. We do not have to worry about incompatibilities. It just works."
"At the moment we are satisfied with this product. It's a stable, scalable, and resilient solution for us."
"The two main features that prove most beneficial for us are URL scanning and attachment scanning."
"This solution provides very good email security that protects us against spamming and malware."
"According to our customers, the product's most valuable feature is the ability to detect spam and reduce phishing emails."
"It is a very scalable solution."
"Beside a few issues with specificity in the email protection controls, this product is very good at handling email security."
"The most valuable feature is that it protects from spam."
"Setup was easy. It took about 30 minutes."
"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

"I'd like some additional features any product can give me to protect our environment in a better way."
"The UI needs to be more user-friendly."
"Microsoft security solutions work as expected. They are constantly updating the solutions to make them better. At the same time, the changes can impact a customer's environment, and we need to adjust settings. Sometimes we aren't aware of the changes, and nothing is pushed from the backend automatically."
"The custom alerts have to improve a lot."
"In the areas of improvement for Microsoft Defender for Office 365, the console is the biggest challenge for me."
"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."
"Configuration at the mid-level could be improved for the support team."
"The product must provide better malware detection."
"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."
"The pricing could be improved."
"There could be definition updates included in the subscription."
"The technical support from the company is not always very good at solving issues, but they offer access to a good community of users where problems are easily solved."
"SonicWall Email Security could improve by making the file blocking and the release feature easier to use"
"The platform's control panel needs enhancement."
"They need well-trained partners in Nigeria."
 

Pricing and Cost Advice

"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."
"The license is expensive because the cost is based on the number of users."
"It's a user-base subscription."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"I was working in the government and it was too expensive for us to use our Microsoft products."
"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."
"For licensing, it's usually a yearly package for customers who are subscribed to Office 365, but they can also pay on a monthly basis."
"I know that the product is incredibly expensive."
"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."
"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."
"I rate the application’s pricing a five out of ten."
"Our customers purchase the solution's yearly license."
"The platform offers a yearly license."
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
8%
Manufacturing Company
8%
Comms Service Provider
6%
Computer Software Company
12%
Manufacturing Company
12%
Educational Organization
10%
Construction Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

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 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...
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 emails.
 

Also Known As

MS Defender for Office 365
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.
Star Kay White, Locala Community Partnerships
Find out what your peers are saying about Microsoft Defender for Office 365 vs. SonicWall Email Security and other solutions. Updated: July 2025.
865,295 professionals have used our research since 2012.