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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
31st
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 November 2025, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 10.9%, down from 14.4% 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 36510.9%
SonicWall Email Security0.5%
Other88.6%
Email Security
 

Featured Reviews

Vikas Ingle - PeerSpot reviewer
Centralized tenant enables group control but setup process complicates implementation
Actually earlier, I used to have full controls with Trend Micro. Microsoft Defender for Office 365 is now part of a centralized tenant for my entire group. I don't have control on that, as another team is maintaining it. Since I don't have full visibility of the features, I cannot make significant comments.
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

"At the moment we are satisfied with this product. It's a stable, scalable, and resilient solution for us."
"Safe attachments, safe links, policies, and the ability to protect from zero-day threats are the most valuable features."
"We use Microsoft Defender for its ability to integrate with existing business technologies, which is beneficial for protecting business areas."
"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."
"Defender helps us prioritize threats across our organization."
"Microsoft Defender for Office 365's most valuable feature is its performance."
"Scalability-wise, I do not think there are any issues so far."
"The product's scalability is good."
"Setup was easy. It took about 30 minutes."
"This solution provides very good email security that protects us against spamming and malware."
"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."
"According to our customers, the product's most valuable feature is the ability to detect spam and reduce phishing emails."
"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."
"We always get ROI from the product we are using; it is completely flexible and acceptable according to our security requirements over the last four years and currently."
"SonicWall Email Security uses multi-layer cloud security."
 

Cons

"I'd like some additional features any product can give me to protect our environment in a better way."
"About eight months ago, we started to measure the quantity of phishing and spam that we have been receiving, and it has been increasing a lot. That means that protection for our email is not as good as we were expecting."
"The XDR dashboard has room for improvement."
"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 pre-sales cost calculations could be more transparent."
"I am generally satisfied with how it currently is. If I could improve anything, I would reduce the cost."
"Several simulation options are available within 365, and the phishing simulation could be better."
"Microsoft should provide more documentation for users so they can self-educate. I would like to see more documentation for advanced security features."
"They need well-trained partners in Nigeria."
"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"
"The pricing could be improved."
"The reporting needs improvement."
"The pricing could be improved."
"I am not satisfied with phishing protection, as it falls completely under the email domain security."
"We would like to see more information on a dashboard about what is happening when it comes to spamming and malware."
 

Pricing and Cost Advice

"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"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 was working in the government and it was too expensive for us to use our Microsoft products."
"The pricing is normal. Considering its popularity, it's not overpriced."
"The license is expensive because the cost is based on the number of users."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."
"We have a two-year license subscription and the price is very high."
"The platform offers a yearly license."
"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."
"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."
"Our customers purchase the solution's yearly license."
"When compared with Cisco, it is very well priced. Cisco is very expensive."
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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
12%
Educational Organization
10%
Construction Company
10%
Comms Service Provider
6%
 

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.
What needs improvement with SonicWall Email Security?
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 pol...
 

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: November 2025.
873,085 professionals have used our research since 2012.