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Cisco Secure Email Threat Defense vs Microsoft Defender for Office 365 comparison

Why PeerSpot?
Cisco and Microsoft are both solutions in the Email Security category. Cisco is ranked #23 with an average rating of 7.3, while Microsoft is ranked #2 with an average rating of 8.5. Cisco holds a 1.1% mindshare in Email Security, compared to Microsoft’s 5.1% mindshare. Additionally, 93% of Cisco users are willing to recommend the solution, compared to 96% of Microsoft users who would recommend it.
Cisco Secure Email Threat D...
Read 16 Cisco Secure Email Threat Defense reviews
  • 2,730 Views
  • 2,730 Comparison Views
93% willing to recommend
Microsoft Defender for Offi...
Read 61 Microsoft Defender for Office 365 reviews
  • 18,434 Views
  • 12,904 Comparison Views
96% willing to recommend
 

Comparison Buyer's Guide

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Executive SummaryUpdated on Dec 3, 2024

Cisco Secure Email Threat Defense and Microsoft Defender for Office 365 compete in the email security space. Cisco Secure Email Threat Defense excels in customer support and pricing, while Microsoft Defender for Office 365 offers superior features, making it appealing for comprehensive security.

Features: Cisco Secure Email Threat Defense provides advanced threat protection, anti-spam filters, and detailed reporting. Microsoft Defender for Office 365 is noteworthy for its integration with the Office suite and advanced threat intelligence, offering comprehensive protection against sophisticated threats. It enhances value through seamless security integration within the Microsoft productivity ecosystem.

Room for Improvement: Cisco Secure Email Threat Defense could improve by enhancing its integration capabilities with third-party platforms, providing more advanced phishing detection, and simplifying its user interface further. Microsoft Defender for Office 365 might benefit from offering more personalized support, addressing complex deployment challenges for non-Office 365 environments, and reducing its high initial setup costs.

Ease of Deployment and Customer Service: Cisco Secure Email Threat Defense offers straightforward deployment and robust customer support, tailoring solutions for various environments. Microsoft Defender for Office 365 is streamlined for existing Office 365 users but may require extra support for complex integrations. Its customer service is known for quick resolutions but may lack personalized support like Cisco.

Pricing and ROI: Cisco Secure Email Threat Defense provides competitive pricing with a focus on strong ROI through reliable security and excellent service. Microsoft Defender for Office 365 has potentially higher setup costs but justifies its pricing with rich features that integrate well with Microsoft infrastructures, leading to higher long-term ROI through enhanced productivity and security.

DOWNLOAD THE COMPLETE REPORT
To learn more, read our detailed Cisco Secure Email Threat Defense vs. Microsoft Defender for Office 365 Report (Updated: September 2026).
Buyer's Guide
Cisco Secure Email Threat Defense vs. Microsoft Defender for Office 365
September 2026
Download the complete report
Helped 915,341 peers since 2012

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

Cisco Secure Email Threat D...
Ranking in Email Security
23rd
Average Rating
8.0
Reviews Sentiment
6.7
Number of Reviews
16
Ranking in other categories
No ranking in other categories
Microsoft Defender for Offi...
Ranking in Email Security
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
61
Ranking in other categories
Email Archiving (2nd), Advanced Threat Protection (ATP) (3rd), Microsoft Security Suite (9th), Secure Email Gateway (SEG) (2nd)
 

Mindshare comparison

As of October 2026, in the Email Security category, the mindshare of Cisco Secure Email Threat Defense is 1.1%, up from 1.0% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 5.1%, down from 11.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Office 3655.1%
Cisco Secure Email Threat Defense1.1%
Other93.8%
Email Security
 

Featured Reviews

GC
Glenn-Camilien
Senior Cybersecurity Engineer at a financial services firm with 11-50 employees
Provides robust email security features but requires improved modernization and complexity management
Modernization is an area that could be improved for Cisco Secure Email Threat Defense, as some features have lagged behind newer competitors, potentially offering more advanced analysis capabilities. The initial setup is not straightforward and requires expertise and time to master configurations such as spoofing and DLP. More control over backend functionalities and simplifying rule management could enhance user experience. The product's complexity at times results in redundant rule sets that are difficult to untangle, highlighting the need for streamlined management systems and a more user-centric approach to system configuration. Furthermore, the pricing might deter new users who could opt for alternative, more cost-effective solutions.
Read full review
Emeka Ndulu - PeerSpot reviewer
Emeka Ndulu
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.
Read full review

Quotes from Members

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

Pros

"Cisco Cloud Mailbox is used for copying emails, anti-spamming, and securing the company's email, and we really enjoy the anti-spamming capabilities as well as the rejecting of bulk emails, which we can customize by adjusting the variables, and it is very user-friendly."
"The advanced threat analytics and URL filtering in threat detection are good features that are working well."
"The solution is stable."
"On ease of use, it rates very high."
"Currently, the ease of deployment is the low-hanging fruit for Cisco email security."
"It's very easy to deploy and configure."
"Cisco Secure Email Threat Defense's best features include user management of graymail, enhancing security awareness by allowing users to manage cold calls, sales-based items, and ensuring email compliance."
"Secure Email Threat Defense's scalability is good."
More Cisco Secure Email Threat Defense pros
"The two main features that prove most beneficial for us are URL scanning and attachment scanning."
"Microsoft Defender for Office 365 saves me time; it does save a lot of time, especially with the automation."
"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."
"Does a thorough job of examining email and URLs for malicious content."
"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."
"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."
"Defender for 365 is a comprehensive cloud-based solution. The value of the cloud is that you aren't alone. Threat intelligence and analytics are shared in the cloud. We don't have to find the solution alone. If you face an unknown threat with traditional solutions like Trend Micro and Symantec, you need to open a case and send your information to them to analyze forensically and identify the source of the attack."
"The DLP feature of Microsoft Defender for Office 365 is valuable, and we also use the DLP feature for email real-time detection."
More Microsoft Defender for Office 365 pros
 

Cons

"Cisco's multiple product lines and verticals made this just one of their many verticals, and we could see a shift in focus."
"Cisco Secure Email Cloud Mailbox can improve by adding advanced phishing, then the solution would become the best in the market. However, this could increase the price even more. Additionally, if CES with domain protection could be added it would be an even better solution."
"Customers will benefit greatly from monthly billing because the majority of customers today use the cloud, be it Office 365, or Google Cloud."
"This solution could be improved by integration with Sandbox."
"From a technical point of view, Cisco is far behind in terms of cybersecurity, and it has to improve very much."
"We encounter issues while searching for missing emails."
"The solution is a bit expensive. It could be cheaper."
"The search area has room for improvement. When you go to the next page, it remains at the bottom of the current page that you're on. Also, under the reports section, it allows you to see any "convictions," but if you want to search for those convictions you have to remember when they all came in and go back and edit the search accordingly. You cannot click on the list of convictions to actually see if you had a spike at a certain time."
More Cisco Secure Email Threat Defense cons
"We noticed that from time to time, Microsoft's stability does have problems. Sometimes the service goes up and down. Sometimes they change without prior notice."
"Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published."
"In the areas of improvement for Microsoft Defender for Office 365, the console is the biggest challenge for me."
"The UI needs to be more user-friendly."
"The visibility for the weaknesses in the system and unauthorized access can be improved."
"I was looking for some advanced features, like if I would receive an email that contains a legitimate file type, but the content is malicious, how I can protect against that?"
"The phishing and spam filters could use some improvement."
"I think Microsoft Defender for Office 365 can be improved by creating more educational pieces about not just looking for malware."
More Microsoft Defender for Office 365 cons
 

Pricing and Cost Advice

"It is expensive compared to other vendors."
"The feedback from vendors and customer is that it is expensive."
"The solution’s pricing is manageable."
"Cisco Secure Email Cloud Mailbox does not have any competition with Sophos, Trend Micro, or other vendors of the world. However, there is a pricing premium for the solution. One has to look at it from that angle that while they are buying Cisco, there will be a premium, and Cisco justifies that premium value. That's why they're charging a high price."
"It is much more expensive than using another solution because we have had to include some options and upgrade our license."
"The pricing has become expensive."
"I know that the product is incredibly expensive."
"The product is very expensive."
"The license is expensive because the cost is based on the number of users."
"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 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."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
More Microsoft Defender for Office 365 pricing and cost advice
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Top Industries

By visitors reading reviews
Marketing Services Firm
11%
Outsourcing Company
9%
Comms Service Provider
8%
Healthcare Company
8%
Computer Software Company
11%
Manufacturing Company
10%
Financial Services Firm
8%
Comms Service Provider
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business4
Midsize Enterprise6
Large Enterprise7
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise11
Large Enterprise32
 

Questions from the Community

What is your experience regarding pricing and costs for Secure Email Threat Defense?
Comparatively with other products, the pricing of Cisco Secure Email Threat Defense is normal. As a technical guide, I am not very aware of the pricing details.
See all answers
What needs improvement with Secure Email Threat Defense?
We have deployed Cisco Secure Email Threat Defense in two customer environments. It is still in development as a new product. Some customer requirements, such as sending logs to a Syslog server, ar...
See all answers
What is your primary use case for Secure Email Threat Defense?
We are working with Cloud Mail Gateway and on-premise mail gateways. We have worked with Cisco Secure Email Threat Defense.
See all answers
What is your experience regarding pricing and costs for Microsoft Defender for Office 365?
My experience with pricing, setup, and licensing is that it's actually quite reasonable even on the licensing side as a standalone product. It's very competitive compared to what competitors are ch...
See all answers
What needs improvement with Microsoft Defender for Office 365?
I think Microsoft Defender for Office 365 can be improved by creating more educational pieces about not just looking for malware. We are seeing a lot more malware-less emails that Defender for Offi...
See all answers
What is your primary use case for Microsoft Defender for Office 365?
My main use cases for Microsoft Defender for Office 365 include email hygiene.
See all answers
 

Comparisons

Cisco Secure Email vs Cisco Secure Email Threat Defense Logo
Cisco Secure Email vs Cisco Secure Email Threat Defense
Compared 18% of the time
Check Point Anti-Spam and Email Security Software Blade vs Cisco Secure Email Threat Defense Logo
Check Point Anti-Spam and Email Security Software Blade vs Cisco Secure Email Threat Defense
Compared 17% of the time
Kiteworks vs Cisco Secure Email Threat Defense Logo
Kiteworks vs Cisco Secure Email Threat Defense
Compared 11% of the time
Comodo Secure Email Gateway vs Cisco Secure Email Threat Defense Logo
Comodo Secure Email Gateway vs Cisco Secure Email Threat Defense
Compared 8% of the time
Proofpoint Email Protection vs Cisco Secure Email Threat Defense Logo
Proofpoint Email Protection vs Cisco Secure Email Threat Defense
Compared 6% of the time
More Cisco Secure Email Threat Defense Competitors
Proofpoint Email Protection vs Microsoft Defender for Office 365 Logo
Proofpoint Email Protection vs Microsoft Defender for Office 365
Compared 5% of the time
Check Point Email Security (formerly Harmony Email & Collaboration) vs Microsoft Defender for Office 365 Logo
Check Point Email Security (formerly Harmony Email & Collaboration) vs Microsoft Defender for Office 365
Compared 4% of the time
Mimecast Advanced Email Security vs Microsoft Defender for Office 365 Logo
Mimecast Advanced Email Security vs Microsoft Defender for Office 365
Compared 3% of the time
Cisco Secure Email vs Microsoft Defender for Office 365 Logo
Cisco Secure Email vs Microsoft Defender for Office 365
Compared 3% of the time
Perception Point Advanced Email Security vs Microsoft Defender for Office 365 Logo
Perception Point Advanced Email Security vs Microsoft Defender for Office 365
Compared 2% of the time
More Microsoft Defender for Office 365 Competitors
 

Product Reports

Buyer's Guide
Cisco Secure Email Threat Defense
October 2026
Cisco Secure Email Threat Defense reportDownload Cisco Secure Email Threat Defense product report
Buyer's Guide
Microsoft Defender for Office 365
September 2026
Microsoft Defender for Office 365 reportDownload Microsoft Defender for Office 365 product report
 

Also Known As

Cisco Secure Email Cloud Mailbox, Cisco CMD, Cisco Cloud Mailbox Defense
MS Defender for Office 365
 

Overview

Cisco Secure Email Threat Defense offers robust email security with features like east-west traffic visibility and seamless SaaS deployment. It enhances cloud email protection by integrating Threat Grid sandboxing and AMP for malware defense, supported by Cisco Talos threat intelligence.

Enhancing email security for Microsoft 365 and cloud emails, Cisco Secure Email Threat Defense acts as an email gateway, blocking phishing, malware, and business email compromise. Users benefit from a centralized management console, efficient graymail administration, and strong filtering capabilities. Despite its strengths, it requires improvements in integration, spam detection accuracy, and enhances phishing protection.

What are the most important features of Cisco Secure Email Threat Defense?
  • East-West Traffic Visibility: Offers insight into email tenant interactions.
  • SaaS Application Deployment: Simplifies deployment processes.
  • Threat Grid Sandboxing: Provides advanced malware protection.
  • AMP Integration: Enhances malware defense capabilities.
  • Anti-Spam and Antivirus: Powered by Cisco Talos threat intelligence.
  • Cloud Mailbox Features: Includes robust email filtering and management.
What benefits or ROI should be evaluated in reviews?
  • Enhanced Security: Provides protection against advanced threats.
  • Operational Efficiency: Reduces reliance on help desk services.
  • User-Friendly Management: Streamlines email administration tasks.
  • Improved Email Filtering: Ensures effective threat blocking.

Cisco Secure Email Threat Defense is highly applicable in industries requiring stringent data protection, such as finance and healthcare. It serves cloud-based environments by closely monitoring email activity to prevent unauthorized access and breaches. Tailored deployment options cater to both on-premise and cloud architectures, allowing flexible integration in existing workflows.

Cisco

Microsoft Defender for Office 365 offers real-time email security, enhancing threat detection through integration within the Microsoft ecosystem. Its user-friendly interface and central management streamline operations, providing robust protection against phishing, ransomware, and malware.

Defender for Office 365 is focused on efficiently securing email communication by safeguarding against phishing, malware, and spam threats. With its strong integration with other Microsoft services, it is tailored to improve endpoint security and identity protection. Its centralized management tools simplify threat prioritization, while the automated threat response capabilities ensure swift actions against potential risks. Organizations leverage its capabilities to efficiently manage their cybersecurity efforts, particularly in remote work environments, while maintaining a secure system across Office 365 applications and Azure-hosted services.

What are the key features?
  • Real-time Email Protection: Continuously monitors and protects email communications.
  • Safe Attachments and Links: Scans attachments and links for potential threats.
  • Anti-Phishing Measures: Provides tools to detect and block phishing attempts.
  • Integration with Microsoft Services: Seamlessly connects with other Microsoft applications for enhanced security.
  • Automated Threat Responses: Activates immediate responses to detected threats.
What benefits should users expect from reviews?
  • Time Savings: Automates processes to reduce manual threat management efforts.
  • Improved Cybersecurity: Strengthens organizational defenses against various cyber threats.
  • Efficient Remote Work: Enhances protection for remote teams and virtual collaborations.
  • Comprehensive Coverage: Extends protection across Office 365 and Azure services.

Implementations of Defender for Office 365 vary across industries, optimizing email security for sectors such as finance, healthcare, and education. In finance, it aids in protecting sensitive financial data from phishing and fraud. Healthcare benefits from secure communications, ensuring patient data privacy. Educational institutions use it to maintain secure virtual learning environments against cyber threats.

Microsoft
 

Sample Customers

Luiss University, Lone Star College, T-Systems, Magyar Telekom
Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Buyer's Guide
Cisco Secure Email Threat Defense vs. Microsoft Defender for Office 365
September 2026
Free Report: Cisco Secure Email Threat Defense vs. Microsoft Defender for Office 365
Find out what your peers are saying about Cisco Secure Email Threat Defense vs. Microsoft Defender for Office 365 and other solutions. Updated: September 2026.
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