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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
6.8
Number of Reviews
60
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)
21st
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 January 2026, in the Advanced Threat Protection (ATP) category, the mindshare of Microsoft Defender for Office 365 is 9.7%, down from 16.8% compared to the previous year. The mindshare of Symantec Advanced Threat Protection is 1.9%, up from 1.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Advanced Threat Protection (ATP) Market Share Distribution
ProductMarket Share (%)
Microsoft Defender for Office 3659.7%
Symantec Advanced Threat Protection1.9%
Other88.4%
Advanced Threat Protection (ATP)
 

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.
TapabrataSamanta - PeerSpot reviewer
Lead Architect at Zones
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 initial setup was easy."
"The product's scalability is good."
"Microsoft Defender for Office 365's most valuable feature is its performance."
"The good part is that you don't have to configure it, which is very convenient."
"The most valuable feature of Microsoft Defender for Office 365 is data backups that we can provide through ticket requests."
"Defender enables us to secure all 365-related activity from a single place. It gives us visibility into everything happening in Outlook, protecting us against phishing and other email-based threats. Defender helps us detect any suspicious behaviors."
"Microsoft Defender has a feature to protect each and every attachment. Even if it's an encrypted attachment, it will check for any potential threats."
"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."
"What I like most about Symantec Advanced Threat Protection is its notification capability."
"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."
"The great advantage in using this product is it creates multiple services."
"The incident management on the solution is very good. You get a lot of detailed information about an incident. You also get a lot of documentation in connection with the CVI or integration."
"The technical support services are excellent."
"The most valuable feature is Click-time URL protection."
"All of the solution's features are quite valuable for us. We especially like the threat protection it provides."
"It has certainly helped out our audit efforts because we each stay compliant in terms of various security standards."
 

Cons

"The product must provide better malware detection."
"Microsoft Defender for Office 365 should improve the troubleshooting tools. It's unclear whether the device is blocked at the firewall level or at the device itself. The granularity needed for troubleshooting is currently lacking. From my perspective, Microsoft should address this issue to benefit many users who likely share the same sentiment."
"Microsoft Defender for Office 365 should be more proactive."
"Microsoft needs to broaden its global support presence by establishing teams of subject-matter experts in all regions."
"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."
"There needs to be an improvement in integrating the product to work across multiple operating systems, and to have better support for non-Microsoft file types."
"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 inbuilt analysis of false positives can be faster. It's not slow, but it can be faster."
"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."
"They could enhance the solution to work across all devices, including Android, iOS, and Mac, and make it more user-friendly."
"It should be able to collect information if the agent is disabled."
"An improvement could be made on the reporting because then it would be easier to collect information and submit it for compliance."
"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."
"One area for improvement could be the pricing model."
"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."
"The product's support services need improvement."
 

Pricing and Cost Advice

"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
"It's a user-base subscription."
"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."
"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."
"It is much more expensive than using another solution because we have had to include some options and upgrade our license."
"I was working in the government and it was too expensive for us to use our Microsoft products."
"From the pricing point of view, like any other product in the market, there is scope for negotiation."
"Symantec Advanced Threat Protection's pricing is comparable."
"Symantec Endpoint Protection has an average price."
"The price is quite expensive."
"The pricing of this solution is inexpensive and affordable."
"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
14%
Financial Services Firm
8%
Manufacturing Company
8%
Comms Service Provider
6%
University
9%
Manufacturing Company
9%
Financial Services Firm
9%
Insurance Company
6%
 

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 Business9
Midsize Enterprise3
Large Enterprise13
 

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 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...
What is your primary use case for Symantec Advanced Threat Protection?
Our primary use case for the product is to provide advanced threat protection to our clients, primarily in the banking and financial sectors.
 

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: December 2025.
881,282 professionals have used our research since 2012.