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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
6.8
Number of Reviews
60
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
30th
Average Rating
7.8
Reviews Sentiment
6.6
Number of Reviews
15
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of February 2026, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 9.1%, down from 13.7% compared to the previous year. The mindshare of SonicWall Email Security is 0.6%, up from 0.5% 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 3659.1%
SonicWall Email Security0.6%
Other90.3%
Email Security
 

Featured Reviews

Emeka Ndulu - PeerSpot reviewer
Cloud Solutions Architect at a tech services company with 201-500 employees
Improves threat visibility and response while reducing manual tasks and training users against phishing
I appreciate the attack simulation feature whereby I get to train users and educate them on how to identify phishing emails and spam emails, as well as the anti-spam protection. It gives me visibility into my threat environment and threat landscape to ensure that I am one step ahead of any likelihood of threats within my environment. I get to detect it and respond, so the threat intelligence is very effective. Microsoft security solutions save my time. It saves money because once I protect my environment, I don't lose money. It has decreased my detection time and my time to respond.
Swapnil Kulkarni - PeerSpot reviewer
System Administrator at Ador Powertron Ltd.
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."
"The benefit that stands out to me is the ability for multiple individuals to collaborate simultaneously within the same document. Additionally, there is the option to save the document directly in the integrated OneDrive or SharePoint."
"Overall, I would rate Microsoft Defender for Office 365 at a ten."
"The most valuable feature of Microsoft Defender for Office 365 is the ease of use."
"I like its investigation capabilities, as that is what is most important to me. It is fairly simple with a user-friendly interface."
"I appreciate the attack simulation feature whereby I get to train users and educate them on how to identify phishing emails and spam emails, as well as the anti-spam protection."
"The features I appreciate most about Microsoft Defender for Office 365 are admin notifications for potential threats along with protecting our Microsoft apps such as Outlook from potential phishing attacks."
"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."
"The anti-spam aspect of the solution is its most valuable feature."
"This solution provides very good email security that protects us against spamming and malware."
"There are no wasted extras and the interface is really simple."
"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."
"Setup was easy. It took about 30 minutes."
"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."
"SonicWall Email Security uses multi-layer cloud security."
 

Cons

"The inbuilt analysis of false positives can be faster. It's not slow, but it can be faster."
"The visibility into threats is not up to the mark, as I do not have control. I rate my experience with Microsoft Defender for Office 365 as six out of ten due to troubleshooting and pricing concerns."
"It would be better if it were more scalable. It depends on the architecture, but we would like to make it more scalable for both data centers."
"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."
"It is not up to the mark in comparison with Wiz or Palo Alto."
"If you look at other products, such as Wiz or Palo Alto's cloud, because they also have similar components in terms of how they protect cloud infrastructure or enable cloud security, Microsoft Defender for Office 365 is not up to that extent."
"Configuring the default strategies and policies in Microsoft Defender for Cloud Apps generates a lot of noise and false positives."
"There is room for improvement in terms of reporting."
"The reporting needs improvement."
"We would like to see more information on a dashboard about what is happening when it comes to spamming and malware."
"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."
"The pricing could be improved."
"I am not satisfied with phishing protection, as it falls completely under the email domain security."
"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"
 

Pricing and Cost Advice

"The license is expensive because the cost is based on the number of users."
"The solution could be better by simplifying the business model of their licensing. It was hard to figure out how to get the licensing done for the environment, initially."
"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"It is much more expensive than using another solution because we have had to include some options and upgrade our license."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
"The pricing has become 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."
"When compared with Cisco, it is very well priced. Cisco is very expensive."
"I rate the application’s pricing a five out of ten."
"The platform offers a yearly license."
"Our customers purchase the solution's yearly license."
"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."
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Top Industries

By visitors reading reviews
Computer Software Company
13%
Financial Services Firm
8%
Manufacturing Company
8%
Comms Service Provider
6%
Financial Services Firm
10%
Computer Software Company
10%
Marketing Services Firm
10%
Manufacturing Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business23
Midsize Enterprise10
Large Enterprise31
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise3
Large Enterprise3
 

Questions from the Community

What needs improvement with Microsoft Defender for Office 365?
The inbuilt analysis of false positives can be faster. It's not slow, but it can be faster.
What is your primary use case for Microsoft Defender for Office 365?
My use case for Microsoft Defender for Office 365 is for email protection, safe links, protection of links, documents, protecting my documents, and protecting attachments. I also use it to conduct ...
What needs improvement with SonicWall Email Security?
Policy deployment could be time consuming and represents an area for improvement in SonicWall Email Security.
What is your primary use case for SonicWall Email Security?
SonicWall Email Security was used for security purposes, which aligns with the product's core function.
 

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: February 2026.
881,733 professionals have used our research since 2012.