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

Cisco and Microsoft are both solutions in the Email Security category. Cisco is ranked #19 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 6.1% mindshare. Additionally, 93% of Cisco users are willing to recommend the solution, compared to 96% of Microsoft users who would recommend it.

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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: June 2026).

Buyer's Guide

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

June 2026

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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

Cloudflare One

Mindshare comparison

As of July 2026, in the Email Security category, the mindshare of Cloudflare One is 1.7%, up from 1.5% compared to the previous year. The mindshare of Cisco Secure Email Threat Defense is 1.1%, up from 1.1% compared to the previous year. The mindshare of Microsoft Defender for Office 365 is 6.1%, down from 12.3% 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	6.1%
Cisco Secure Email Threat Defense	1.1%
Cloudflare One	1.7%
Other	91.1%

Email Security

Featured Reviews

Cobe Van Coller

Network Architect at IP Dimension

Cloud security has improved remote access and has reduced costs for smaller client sites

I have used Cloudflare One's Identity-Aware Proxy, and it is quite straightforward from what I have seen so far. The app registration on the Azure side integrates fully into Cloudflare, and I am very satisfied with that part because it is easy to set up. The integration of Cloudflare One's Secure Web Gateway and Zero Trust Network Access works without any issues. That part is pretty automatic, and if you complete the rest of the setup, it comes together by itself with no issues from my side. What makes it nice is that we can actually start replacing on-site firewalls at this stage for the smaller clients because it does not matter if they go to a coffee shop or work from home; they are still secured by the same connection. The hops get shorter and you get better latency. We have done testing to see if it is better. One thing that we did notice with our proof of concept with our current client is that they have people connecting from the UK. When they used their previous VPN solution, uploading CAD drawings and other files to the server took a long time. They mentioned that it is much quicker on Cloudflare One's solution. I definitely believe that is part of the improved performance, and I am satisfied with that as well. What is nice about Cloudflare One is that it makes the setup easier and also easier to train technicians to maintain it. Compared to legacy systems, we do not need to get fancy firewalls in place that are costly. That is definitely also a cost-saver with Cloudflare One.

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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.

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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.

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Quotes from Members

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

Pros

"Cloudflare is by far the most effective solution that I have come across."

"Clover is the best product globally."

"Cloudflare Zero Trust Platform removes the risk of exposing the applications to the public."

"It's the endpoint exposition. We don't need to expose our VPN server to the internet and need a zero-test solution. I can apply some conditional access to the endpoint that's connecting to our network to check their security policies or the security condition of their workstation. Once the workstation is trying to connect to my internal network, then I would like to check the discrete condition of these endpoints that are trying to access my internal network. We created some conditional access. We have CrowdStrike, to check if the CrowdStrike is installed, to check if it's updated, and to check for Windows updates. We created some conditional policies to check it."

"Cloudflare DDoS mitigates DDoS attacks."

"Enables me to work from two locations."

"It is a stable solution."

"The capabilities of the software are strong enough for me to do what it's supposed to do. For me, we don't need to do a lot of configuration on our site. We just enable it and monitor it."

More Cloudflare One pros

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

"On ease of use, it rates very high. It's something that I was able to get into without really looking at any documentation. I wanted to see what it felt like before I started looking at any documentation on how to use it, and it was very easy to use. It works very smoothly. The user experience is very intuitive. They did an amazing job on that."

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

"Regarding stability, Cisco Secure Email Threat Defense is very stable."

"The solution is stable."

"The advanced threat analytics and URL filtering in threat detection are good features that are working well."

"The features and functionalities are much better than Microsoft's in-built Defender plan, and this product has helped us to protect our organization from any malware attack in the past."

"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."

More Cisco Secure Email Threat Defense pros

"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."

"Since we have started using the solution, there have been fewer compromises."

"Technical support is very good. They are knowledgeable and respond quickly."

"One of our clients didn't have the budget to invest in a SOC team, but we deployed the solution for them, and they now run a SOC with only one analyst."

"Microsoft Defender for Office 365 facilitates efficient management and updates through the cloud. We do not have to worry about incompatibilities. It just works."

"Defender is a SaaS platform, so it offers more flexibility. Managing the permissions is easier. The solution's automated detection and response features are scalable."

"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."

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

More Microsoft Defender for Office 365 pros

Cons

"They don't have a person to provide support for customers using the solution under their free plan."

"Cloudflare Zero Trust Platform needs to improve its documentation. It took time to do the implementation."

"The response time for support must be reduced."

"The onboarding process can be improved a little bit."

"Our subscription plan for the solution has a limitation of bot signatures."

"The pricing is an area that can be improved. Pricing, as far as I recall, was the source of our problems."

"The tool should provide on-premise versions. Currently, all versions are cloud-based."

"Automation could be improved where you can easily add a TLS and SSL certificate to an application or web app if the developer did not include it."

More Cloudflare One cons

"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."

"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."

"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."

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

"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."

"We encounter issues while searching for missing emails."

More Cisco Secure Email Threat Defense cons

"I think Microsoft Defender for Office 365 can be improved by creating more educational pieces about not just looking for malware."

"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?"

"Microsoft Defender for Office 365 could improve by giving customers information on techniques to prevent threats."

"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 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."

"In the areas of improvement for Microsoft Defender for Office 365, the console is the biggest challenge for me."

"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."

"The changes to customer service, specifically the new model for support agreements, are not favorable."

More Microsoft Defender for Office 365 cons

Pricing and Cost Advice

"The solution's pricing lacks transparency."

"The solution is not that expensive."

"Cloudflare Zero Trust Platform's pricing is good."

"The price tag is no longer $200,000, but rather $300,000 to $400,000. It's twice."

"The prices are slightly expensive."

"My company has to make yearly payments towards the licensing costs attached to the solution. There are no hidden charges apart from the licensing costs of the solution."

"The pricing is somewhere in the middle. I would rate the pricing a seven out of ten."

"The pricing of the solution is cheap. The licensing cost is also very low. I rate the cost and pricing a three out of ten."

"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."

"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 is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."

"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."

"The pricing has become expensive."

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

"While Microsoft Defender for Office 365 necessitates pricier E3 or E5 subscriptions, the extensive functionality offered by these licenses across various Microsoft products justifies the investment."

"The product is very expensive."

More Microsoft Defender for Office 365 pricing and cost advice

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Top Industries

By visitors reading reviews

Construction Company

19%

Comms Service Provider

10%

Financial Services Firm

Manufacturing Company

Marketing Services Firm

12%

Manufacturing Company

Government

Construction Company

Computer Software Company

12%

Manufacturing Company

Financial Services Firm

Comms Service Provider

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	10
Midsize Enterprise	1
Large Enterprise	12

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 Cloudflare Zero Trust Platform?

Pricing is competitive. Akamai is more expensive, in my view.

See all answers

What needs improvement with Cloudflare Zero Trust Platform?

In my opinion, Cloudflare One can be improved mainly through compatibility, as the integration should be much simpler...

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What is your primary use case for Cloudflare Zero Trust Platform?

Cloudflare One's primary use case for my organization is to protect servers and to provide remote access with the VPN...

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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, ...

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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 ...

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 De...

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...

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 ...

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

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Product Reports

Buyer's Guide

Cloudflare One

July 2026

Download Cloudflare One product report

Buyer's Guide

Cisco Secure Email Threat Defense

July 2026

Cisco Secure Email Threat Defense report

Download Cisco Secure Email Threat Defense product report

Buyer's Guide

Microsoft Defender for Office 365

June 2026

Microsoft Defender for Office 365 report

Download Microsoft Defender for Office 365 product report

Also Known As

Cloudflare Area 1 Email Security, Cloudflare Bot Management, Cloudflare Gateway, Cloudflare Zero Trust Platform, Cloudflare DDoS, Cloudflare SASE & SSE Platform

Cisco Secure Email Cloud Mailbox, Cisco CMD, Cisco Cloud Mailbox Defense

MS Defender for Office 365

Overview

Cloudflare One is a comprehensive platform for security, performance, and connectivity. It provides features like rate limiting, DDoS protection, and application access, tailored to enhance user experience while securing internet access and accelerating communications.

Designed to integrate security measures with ease of use and scalability, Cloudflare One offers a secure web gateway and zero trust network access. These features ensure seamless setup and operation, making connectivity reliable and protected. Users appreciate its integrated console, intuitive interface, and the ability to manage risk effectively. It offers straightforward deployment, improves latency, and boasts cost-effectiveness. While its onboarding process and documentation need enhancement, its value in content delivery and application shielding is notable. Despite challenges in integrating Cloudflare Access with existing VPNs and the need for better automation and support, it remains vital for DNS and infrastructure protection.

What features make Cloudflare One stand out?

Rate Limiting: Controls the traffic rate to prevent abuse.
DDoS Protection: Shields applications from distributed denial-of-service attacks.
Secure Web Gateway: Provides secure internet access with seamless operation.
Zero Trust Network Access: Ensures secure, application-based connectivity without relying on traditional VPNs.
Access for Connectivity: Facilitates access to internal applications securely.

What benefits should users look for in reviews?

Security: Robust measures for DNS and browsing protection.
Performance: Enhanced site accessibility and communication speed.
Cost-Effectiveness: Offers competitive pricing for its features.
Ease of Deployment: Straightforward and efficient setup process.

In industries like finance, retail, and technology, Cloudflare One is crucial for enabling secure remote access and protecting web applications against dynamic threats. It supports compliance access policies and enhances content delivery, playing a key role in safeguarding digital infrastructure.

Cloudflare

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

23andMe

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

June 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: June 2026.

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