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Microsoft Defender for Office 365 vs Symantec Advanced Threat Protection comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Dec 1, 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 Advanced Threat Protection (ATP)
2nd
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
53
Ranking in other categories
Email Archiving (1st), Email Security (1st), Microsoft Security Suite (10th), Secure Email Gateway (SEG) (1st)
Symantec Advanced Threat Pr...
Ranking in Advanced Threat Protection (ATP)
20th
Average Rating
7.8
Reviews Sentiment
7.1
Number of Reviews
16
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2025, in the Advanced Threat Protection (ATP) category, the mindshare of Microsoft Defender for Office 365 is 8.0%, down from 13.2% compared to the previous year. The mindshare of Symantec Advanced Threat Protection is 2.1%, down from 2.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Advanced Threat Protection (ATP)
 

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.
TapabrataSamanta - PeerSpot reviewer
Reliable platform with effective integration capabilities
Our primary use case for the product is to provide advanced threat protection to our clients, primarily in the banking and financial sectors Symantec ATP has been beneficial in ensuring robust security for our clients. Its effectiveness in detecting and mitigating threats has improved customer…

Quotes from Members

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

Pros

"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."
"The stability of Microsoft Defender for Office 365 is fantastic."
"My experience with customer support and technical support for Microsoft Defender for Office 365 has been excellent."
"The initial setup was easy."
"The deployment capability is a great feature."
"The product's scalability is good."
"Microsoft Defender for Office 365 is a stable solution."
"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."
"Currently we have 800-plus nodes connected with this solution, without any issues. The solution is scalable."
"Technical support is very responsive. You just have to open a ticket. They respond in a timely manner. Their response is good. I'm satisfied."
"They manage to solve detection quite nicely. There is some rather elaborate detection compared to other providers."
"Endpoint to network protects the line."
"The Application Control code and the easy integration are valuable features."
"It has certainly helped out our audit efforts because we each stay compliant in terms of various security standards."
"The most valuable feature is Click-time URL protection."
"Symantec Endpoint Protection provides end-to-end protection. Along with antivirus protection, it has a lot of key areas, including intrusive prevention, firewall features, and application and device control."
 

Cons

"Too many false positives and lacks an accurate capability to detect malicious SharePoint sites."
"Sometimes, phishing emails manage to pass through the filter, so the system needs to enhance its phishing email detection capabilities."
"Microsoft sometimes has downtime, and we'll get several incidents coming in back to back. We have a huge backlog of notifications, many of which may be false positives. However, there might be serious alerts, so we can't risk dismissing all of them at once."
"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."
"This product's effectiveness could be improved, in terms of detecting unwanted spam or even malware between the emails, compared to other products."
"The only thing they should improve is the licensing model. They should stop changing it. A year ago, the five features I mentioned were included in one product. Now, three of them are bundled into one product, and you have to pay extra for the other two. I don't mind paying extra, but I don't want them to change it every year or every six months. I need to know what I'm looking at and not worry about it next year."
"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."
"The changes to customer service, specifically the new model for support agreements, are not favorable."
"The security features need to be improved."
"The support has dropped down to a five out of ten."
"The cloud platform needs to have improvement in terms of the user interface and the different capabilities it has available. It needs to match the other leading next-gen EDR products that are available in the market. That's the reason why we are stepping away from Symantec. Their cloud environment is just generally lacking in comparison to others."
"Symantec appliances need improvement. The whole appliance environment is a robust system and it needs a massive amount of storage space. If you have to increase or speed up the background storage it's a pretty complicated process. The scalability and sizing is critical, and if you do it wrong you run into issues pretty quickly."
"The support for new OSs and older OSs could be a little tighter. They need to be more upfront about what protection services they're going to provide on new OSs. I haven't seen the Windows 11 version out yet. It is either already released in Beta, or the Beta will be released soon. There could be a little bit more advanced updates on what they're doing to help protect Windows 11 environments. They can let us know in advance so that we know it is going to be protected. We can't roll out the new OS without putting end-point protection on it. So, they should tell us what is their support model for that, and what are they doing to protect Windows 11. They're not telling me, and that's a criticism. The same issue is applicable to all the other antivirus tools. It is not just Symantec; all of them have this problem."
"It should be able to collect information if the agent is disabled."
"Not ideal for advanced threat protection."
"There are some ‎features that would add value to this product. One of them would be a graphical presentation of threats that the system has encountered."
 

Pricing and Cost Advice

"The product is very expensive."
"I know that the product is incredibly expensive."
"Defender for 365 comes in various plans and licenses, along with other Microsoft security solutions. Purchasing this kind of package or security bundle gives good value for money, and that's what I recommend."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"It is much more expensive than using another solution because we have had to include some options and upgrade our license."
"The product is expensive."
"It's a user-base subscription."
"Symantec Advanced Threat Protection's pricing is comparable."
"The pricing of this solution is inexpensive and affordable."
"The price is quite expensive."
"Symantec Endpoint Protection has an average price."
"Pricing is good. It is nice to have a great product at a fair price."
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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%
Financial Services Firm
13%
Manufacturing Company
12%
University
10%
Insurance Company
6%
 

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 Symantec Advanced Threat Protection?
Symantec Endpoint Protection provides end-to-end protection. Along with antivirus protection, it has a lot of key areas, including intrusive prevention, firewall features, and application and devic...
What is your experience regarding pricing and costs for Symantec Advanced Threat Protection?
The price is quite expensive because a different entity has taken over the company.
What needs improvement with Symantec Advanced Threat Protection?
One area for improvement could be the pricing model. Future releases could further enhance integration capabilities with other platforms and simplify the licensing model to compete more with Micros...
 

Also Known As

MS Defender for Office 365
No data available
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
ECI
Find out what your peers are saying about Microsoft Defender for Office 365 vs. Symantec Advanced Threat Protection and other solutions. Updated: July 2025.
865,384 professionals have used our research since 2012.