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 #18 with an average rating of 7.3, while Microsoft is ranked #2 with an average rating of 8.4. Cisco holds a 1.1% mindshare in Email Security, compared to Microsoft’s 6.9% 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: April 2026).

Buyer's Guide

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

April 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 May 2026, in the Email Security category, the mindshare of Cloudflare One is 1.7%, up from 1.6% 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 6.9%, down from 12.9% 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	6.9%
Cisco Secure Email Threat Defense	1.1%
Cloudflare One	1.7%
Other	90.3%

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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reviewer2541525

Principal Cyber Prevent and Defense Engineer at a comms service provider with 1,001-5,000 employees

Clawback feature performs well but analytics and integration capabilities need improvement

The integration capability with other threat intelligence platforms is not optimal, as I have experienced difficulty in sending logs to our SIEM. Cisco Secure Email Threat Defense's flexibility could be enhanced while it mostly integrates with cloud solutions, but not on-premise. The behavioral analysis capability of Cisco Secure Email Threat Defense is not particularly helpful for identifying new, evolving threats within my company, as it keeps flagging legitimate emails as malicious. Regarding room for improvement, the significant number of false positives should be addressed. The solution does not adapt to behavioral analytics and does not make changes when it sees a pattern.

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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

"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."

"Cloudflare One has assisted in securing my remote workforce through a SASE solution with Cloudflare One and the Workers part, although I am not currently using the Workers component."

"The tool also offers good scalability, and the dashboard, along with real-time analytics, is very good."

"Cloudflare Access is a stable solution."

"For Cloudflare Access, I am using the free plan...The most valuable feature is their protection."

"It will take the blow rather than our applications should an attack occur."

"It is a stable solution."

"Clover is the best product globally."

More Cloudflare One 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."

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

"The features and functionalities are much better than Microsoft's in-built Defender plan."

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

"This solution is easy to use."

"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."

"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."

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

More Cisco Secure Email Threat Defense pros

"The insights provided with Microsoft Defender for Office 365 are helpful because it comes with the E5 license, and by default, we can use a lot of capabilities."

"It’s easy to handle integrations, and we don't need a lot of people in our IT team."

"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."

"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."

"The DLP feature of Microsoft Defender for Office 365 is valuable, and we also use the DLP feature for email real-time detection."

"The most valuable feature is the integration. It's a single console, so we don't have to switch around between multiple products. Another valuable feature is the ease of operations and maintenance."

"One of the best features of the tool is its capability to aggregate insights from different workloads, basically from the Office 365 and endpoints part."

"It also gives me good visibility because, with Defender, I'm using a Microsoft product to defend Microsoft products. The integration was really seamless and I have wide visibility because it picks up almost everything. Literally, I can see almost every activity that happens, from the e-mail to the workstation itself."

More Microsoft Defender for Office 365 pros

Cons

"Our customers no longer use Cloudflare because its service is subpar."

"The software has automated alerts, but the automated alerts are not available in the mobile app."

"The initial onboarding was causing us some confusion."

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

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

"I would like them to include a VPN feature to provide a secure connection to the data center."

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

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

More Cloudflare One cons

"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."

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

"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 physical appliance has been discontinued, although the platform still exists."

"There is still room for improvement in terms of integrations with other Cisco tools and non-Cisco tools. There is also some room for improvement needed in terms of the reporting."

"The behavioral analysis capability of Cisco Secure Email Threat Defense is not particularly helpful for identifying new, evolving threats within my company, as it keeps flagging legitimate emails as malicious."

"This solution could be improved by integration with Sandbox."

"Cisco's multiple product lines and verticals made this just one of their many verticals, and we could see a shift in focus."

More Cisco Secure Email Threat Defense cons

"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."

"They can improve their security in a way where a customer can know if all their attachments are safe or not to open through a report. The solution does its job perfectly, but it never reports to the customer whether those attachments have been stopped before or not."

"We are waiting for better software to block viruses."

"I believe Microsoft Defender for Office 365 can be improved as the policy tuning can get complex, so better baseline templates and clearer impact simulation before enforcement would help avoid trial and error."

"I am generally satisfied with how it currently is. If I could improve anything, I would reduce the cost."

"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."

"You should be able to deploy Defender for every subscription without the need to add servers."

More Microsoft Defender for Office 365 cons

Pricing and Cost Advice

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

"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."

"The prices are slightly expensive."

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

"The solution is not that 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 solution's pricing lacks transparency."

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

"The solution’s pricing is manageable."

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

"It is expensive compared to other vendors."

"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."

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

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

"Defender is a little bit more expensive as compared to others. We are in the manufacturing environment. So, we don't have a high budget for all of our endpoint devices. Its cost is a major concern for us."

"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 is normal. Considering its popularity, it's not overpriced."

"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."

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

More Microsoft Defender for Office 365 pricing and cost advice

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Top Industries

By visitors reading reviews

Construction Company

21%

Comms Service Provider

10%

Financial Services Firm

Manufacturing Company

Marketing Services Firm

12%

Manufacturing Company

Healthcare Company

Computer Software Company

12%

Financial Services Firm

Manufacturing Company

Comms Service Provider

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	10
Midsize Enterprise	2
Large Enterprise	11

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

By reviewers
Company Size	Count
Small Business	25
Midsize Enterprise	12
Large Enterprise	31

Questions from the Community

What needs improvement with Cloudflare Access?

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What is your primary use case for Cloudflare Access?

Cloudflare Access provides secure access to internal applications for employees, external members of the organization...

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What advice do you have for others considering Cloudflare Access?

Cloudflare Access is one of the best integrations available. While about two hundred vendors offer similar services, ...

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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 ...

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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...

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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...

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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 ...

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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

May 2026

Download Cloudflare One product report

Buyer's Guide

Cisco Secure Email Threat Defense

May 2026

Cisco Secure Email Threat Defense report

Download Cisco Secure Email Threat Defense product report

Buyer's Guide

Microsoft Defender for Office 365

April 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

April 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: April 2026.

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