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

Cisco Secure Email Threat D...

Microsoft Defender for Offi...

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.

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

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Helped 918,970 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

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

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
Product	Mindshare (%)
Microsoft Defender for Office 365	5.1%
Cisco Secure Email Threat Defense	1.1%
Other	93.8%

Email Security

Featured Reviews

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

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

"On ease of use, it rates very high."

"Cisco has a threat mechanism called cloud-based Talos, where all the threats are inbuilt."

"Currently, the ease of deployment is the low-hanging fruit for Cisco email security."

"Cisco Secure Email Cloud Mailbox can handle a complete portfolio, which is required to protect any kind of attack coming from emails. However, it does not have advanced phishing, but it is available through Cisco. If you compare Cisco Secure Email Cloud Mailbox with the competition, in the competition you have to have one or two solutions together to address the customer's requirement, whereas Cisco Secure Email Cloud Mailbox is addressing everything, such as web domain and email protection. If there is any kind of challenge it will come across through email."

"I highly recommend it as one of the best choices."

"Overall, it's certainly a very good idea to integrate another layer on top of Microsoft Advanced Threat Protection."

"The product offers protection, email security, anti-spam, and antivirus."

"It's very easy to deploy and configure."

More Cisco Secure Email Threat Defense pros

"Microsoft Defender for Office 365 is a cloud-based email filtering service that helps protect our organization against unknown malware and viruses by providing robust zero-day protection and includes features to safeguard our organization from harmful links in real-time."

"The two main features that prove most beneficial for us are URL scanning and attachment scanning."

"The email protection is excellent, especially in terms of anti-phishing policies."

"It definitely is a must for email protection and O365 app DLP, and combined with Microsoft Defender for Endpoint, Microsoft Defender for Identity, and MCAS, it provides a holistic solution for threat protection, email protection, O365 apps protection, and DLP for both internal and external risks."

"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."

"Overall, I would rate Microsoft Defender for Office 365 at a ten."

"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."

"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."

More Microsoft Defender for Office 365 pros

Cons

"The solution is a bit expensive. It could be cheaper."

"The tool gives false positives and it needs to be more accurate. I would like to see AI as a new feature."

"The pricing could always be better."

"I wouldn't recommend Cisco to others because I think Fortinet is better."

"The learning curve shows that in the beginning, there are numerous false positives. For one month, we had to reclassify the false positives manually until the system learned."

"From a technical point of view, Cisco is far behind in terms of cybersecurity, and it has to improve very much."

"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."

"The search area has room for improvement."

More Cisco Secure Email Threat Defense cons

"Configuration at the mid-level could be improved for the support team."

"Several simulation options are available within 365, and the phishing simulation could be better."

"The custom alerts have to improve a lot."

"The UI needs to be more user-friendly."

"To improve Microsoft Defender for Office 365, it would be nice to have more accessibility for users to see on their end what they are doing that could cause a threat."

"Microsoft wants its well-paying customers to finish testing some of its half-baked products, find bugs, and report bugs back to Microsoft's team, which is a little frustrating for those who have to manage it and roll it up to thousands of people across the organization."

"In one of the reports I can get the exact place where a vulnerable file resides. But for that, I need to explicitly go into the device and check. If they could include that file part in the report, without my having to go to the device itself, that would help."

"This is quite an expensive solution and understanding the pricing model and features is quite complicated and it can, in fact, be a nightmare when dealing with Microsoft."

More Microsoft Defender for Office 365 cons

Pricing and Cost Advice

"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 expensive compared to other vendors."

"The feedback from vendors and customer is that it is expensive."

"The solution’s pricing is manageable."

"From the pricing point of view, like any other product in the market, there is scope for negotiation."

"For large enterprise organizations, they can definitely afford it, but for small and medium organizations, they might struggle to cover the expenses."

"Microsoft Defender for Office 365 comes with Microsoft Windows. It is free with the operating system."

"It's a user-base subscription."

"The product is 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."

"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."

"Microsoft Defender for Office 365 is an add-on to the Office license. Many customers are purchasing this solution."

More Microsoft Defender for Office 365 pricing and cost advice

See which vendors are best for you

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Top Industries

By visitors reading reviews

Marketing Services Firm

11%

Outsourcing Company

Comms Service Provider

Healthcare Company

Computer Software Company

11%

Manufacturing Company

10%

Financial Services Firm

Comms Service Provider

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	4
Midsize Enterprise	6
Large Enterprise	7

By reviewers
Company Size	Count
Small Business	24
Midsize Enterprise	11
Large Enterprise	32

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

Compared 18% of the time

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

Compared 10% of the time

Comodo Secure Email Gateway vs Cisco Secure Email Threat Defense

Compared 8% of the time

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

Compared 5% of the time

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

Compared 3% of the time

Cisco Secure Email vs Microsoft Defender for Office 365

Compared 3% 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 report

Download Cisco Secure Email Threat Defense product report

Buyer's Guide

Microsoft Defender for Office 365

October 2026

Microsoft Defender for Office 365 report

Download 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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