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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
35th
Average Rating
7.6
Reviews Sentiment
6.8
Number of Reviews
14
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 11.5%, down from 15.4% 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 Market Share Distribution
ProductMarket Share (%)
Microsoft Defender for Office 36511.5%
SonicWall Email Security0.5%
Other88.0%
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.
Swapnil Kulkarni - PeerSpot reviewer
Has consistently supported security needs for mid-sized teams with affordable deployment
I do not work with Cloud Secure Edge, CSE, or SMA apart from SonicWall NSA. I am not satisfied with phishing protection, as it falls completely under the email domain security. The customizable policy configuration does not help to tailor email security overall because our systems are not integrated with SonicWall Email Security. We are not using reporting and analytics because it requires completely different software. While all required features are available in SonicWall Email Security for SMBs and startups, we lack analytics features. They provide an option to purchase a complete separate product for analytics, but despite initially having purchased the paper license, due to technical limitations or changes, we cannot use that product. Now they require additional fees to access the analytics feature.

Quotes from Members

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

Pros

"Defender for Office 365 has helped eliminate having to look at multiple dashboards and that is the aspect I like most about it. It is simpler, effective, and convenient. The users like the process efficiency."
"Microsoft Defender for Office 365 has improved my organization's security. It makes it easier to manage the infrastructure without the help of third-party applications."
"The product's scalability is good."
"It gives us visibility into threats and, for endpoints, it helps us to prioritize threats. We used to have a lack of visibility, but now our time to detect and respond has decreased."
"It also gives the vulnerability status according to the versions you have selected. Let's say you have Google Chrome. It mentions the versions it has, and it updates. Within two hours of an update, it is reflected in the dashboard. That's really nice to have."
"The solution is very easy to use. All you have to do is to assign the license to the end-user and it's done. The customer will only have the feature activated, and the solution will monitor the emails to determine if they are a threat or not."
"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 most valuable aspect of Microsoft Defender for Office 365 is its ability to protect us from malware."
"The product is easy to manage in terms of configurations."
"According to our customers, the product's most valuable feature is the ability to detect spam and reduce phishing emails."
"There are no wasted extras and the interface is really simple."
"Setup was easy. It took about 30 minutes."
"The anti-spam aspect of the solution is its most valuable feature."
"Beside a few issues with specificity in the email protection controls, this product is very good at handling email security."
"SonicWall Email Security uses multi-layer cloud security."
"The most valuable features are the anti-spam, anti-phishing, anti-virus, and anti-spoofing."
 

Cons

"One area for improvement is integration. For example, when it comes to external SaaS platforms, we were not able to get a lot of information on integrations with such apps for security and authentication."
"We need to be able to whitelist data at the backend."
"Several simulation options are available within 365, and the phishing simulation could be better."
"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."
"They can improve their security in a way where a customer can know if all their attachments are safe or not to open through a report. The solution does its job perfectly, but it never reports to the customer whether those attachments have been stopped before or not."
"Specifically, within Microsoft Defender for Office 365, I want it to improve the DLP capabilities."
"Microsoft Defender for Office 365 could improve by giving customers information on techniques to prevent threats. For example, information about best practices on how to protect their own devices against hackers and scammers, such as educational information or training. This would help others have a better understanding of cyber security. Additionally, there can be more security features added."
"The custom alerts have to improve a lot."
"There could be definition updates included in the subscription."
"The platform's control panel needs enhancement."
"They need well-trained partners in Nigeria."
"The reporting needs improvement."
"The pricing could be improved."
"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."
"A lot of spoofed emails are still coming to the end-user, so the configuration for this option needs to be improved."
"Updates could be released more frequently."
 

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."
"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."
"The product is expensive."
"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"I know that the product is incredibly expensive."
"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."
"The product is very expensive."
"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."
"When compared with Cisco, it is very well priced. Cisco is very 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."
"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."
"The cost is cheaper than Sophos. I would rate it as five out of ten."
"We have a two-year license subscription and the price is very high."
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Financial Services Firm
8%
Manufacturing Company
8%
Comms Service Provider
6%
Computer Software Company
14%
Construction Company
10%
Educational Organization
10%
Manufacturing Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business23
Midsize Enterprise8
Large Enterprise27
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise2
Large Enterprise3
 

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?
I think that Microsoft Defender for Office 365 could be improved if it could use VirusTotal to compare the programs or anything that I download. VirusTotal helps to identify viruses, malware, troja...
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: September 2025.
867,783 professionals have used our research since 2012.