Cisco Secure Email vs Microsoft Defender for Office 365 comparison

Cisco and Microsoft are both solutions in the Email Security category. Cisco is ranked #5 with an average rating of 8.3, while Microsoft is ranked #2 with an average rating of 8.5. Cisco holds a 4.7% 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.

Comparison Buyer's Guide

Download the report

Executive SummaryUpdated on Feb 8, 2026

Cisco Secure Email and Microsoft Defender for Office 365 are key players in the email security category. Cisco Secure Email delivers superior threat intelligence integration, which distinguishes it in threat blocking, while Microsoft Defender for Office 365 excels in seamless integration within the Microsoft suite, enhancing its overall protection.

Features: Cisco Secure Email is notable for features like IronPort, Advanced Malware Protection, and DKIM/DMARC security. It effectively handles threats such as ransomware, spam, and spear-phishing and offers a customizable configuration. Microsoft Defender for Office 365 provides integrated protection with advanced features like Safe Attachments and Safe Links. Its integration with other Microsoft security solutions enhances threat visibility and user protection.

Room for Improvement: Cisco Secure Email needs enhancements in its user interface, license management, and integration capabilities. Users have suggested improvements in its configuration process and the addition of AI-driven anti-phishing features. Microsoft Defender for Office 365 requires better phishing detection, improved threat visibility, and more straightforward licensing models. Users seek greater transparency in pricing and improved documentation for advanced features.

Ease of Deployment and Customer Service: Cisco Secure Email offers deployment options, including on-premises and hybrid solutions, and is praised for its responsive customer support. Microsoft Defender for Office 365, primarily cloud-based, integrates well within its ecosystem but could enhance support clarity and response times. Both products provide reliable technical support, though Cisco occasionally faces feedback on delays.

Pricing and ROI: Cisco Secure Email is often viewed as expensive but justifies its cost with robust security and a solid ROI due to effective threat blocking. Microsoft Defender for Office 365, part of Office 365 licensing, is seen as competitively priced, especially for users of Microsoft products, though some find its add-on costs challenging. Both solutions offer good value for comprehensive security benefits, with Cisco having higher expenses compared to Microsoft.

To learn more, read our detailed Cisco Secure Email vs. Microsoft Defender for Office 365 Report (Updated: June 2026).

Buyer's Guide

Cisco Secure Email vs. Microsoft Defender for Office 365

June 2026

Download the complete report

Helped 903,807 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

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 is 4.7%, down from 6.2% 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	4.7%
Cloudflare One	1.7%
Other	87.5%

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.

Read full review

Karthik Sathivel

Technical Associate Network Security at Valuepoint Systems

Email security has protected financial data and provides clear tracking for every branch message

The areas of Cisco Secure Email that could be improved or enhanced are the slowness in the console. I don't think it was a database error or something, but we feel some slowness in configuring DLP and other content filters compared to other consoles. It may have been due to on-premises, but it was much noisy at some times while configuring DLP. When we tried to configure a DLP policy, the console became much slower. In that case, we cannot see what had happened in the mail which was blocked at that time. It may take nearly an hour to get back to normal while configuring policies. That is the major issue in the product.

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

"Using Cloudflare One makes my work quite easy because for DDoS protection, all I need to do is understand the OSI model and click; it makes it easier than trying to write a command line or use a Linux command."

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

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

"The solution has different options that can be used to differentiate DDoS attacks."

"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."

"It's a perfect solution from my perspective; it's easy to understand and easy to configure."

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

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

More Cloudflare One pros

"It blocks bulk marketing messages, graymail, spam, and provides advanced malware protection."

"It's a bit easy to handle Cisco Secure Email; it's not that difficult. For the logs, which are in PDF format, it's not hard to read them. We don't need Wireshark much to analyze the logs."

"The tool has a DLP solution which we can implement. Its database is updated regularly."

"Anti-Spam and Advanced Malware Protection are the most valuable features; they provide protection from most email threats and we also have the option to block Zero-day attacks."

"I love the Advanced Malware Protection feature. It works very well... The appliance has more security such as SDF, DKIM, DMARC, and encryption."

"We like the in-built features, like the email filtering based on the IP and domain, and Cisco has its own blacklisted domains and IPs, which is very good because this filters around 70 percent of emails from spam and we are seeing fewer false positives with this."

"The return here is more security and fewer interruptions; it's more stability and productivity versus less productivity, and you could say that you're minimizing your costs by $65,000."

"It does a great job of preventing spam, malware, and ransomware."

More Cisco Secure Email pros

"The technical support is good and quick to resolve issues."

"Threat Explorer is an invaluable tool for me, and it plays a crucial role in helping me discern the origins of various email campaigns, pinpointing where they emanate from, and identifying the individuals within our organization who are affected."

"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."

"Defender has reduced the time our security team spends on tasks by 10 to 15 percent, allowing us to focus on other areas."

"With Defender for Office 365, we have been able to increase the security posture across our organization."

"The initial setup was easy."

"The deployment capability is a great feature."

"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

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

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

"For the topic of improvement, providing some training material is one of my suggestions."

"Cloudflare One is not very powerful, but for what we require, it is basic and sufficient."

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

"The response time for support must be reduced."

"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."

"When there are any dynamic changes in complex applications, the tool takes a lot of time, making its analytics-related area a major matter of concern where improvements are needed."

More Cloudflare One cons

"I am not satisfied with the solution's reporting and logging."

"The management features of the product are not up to date."

"The interface is dated. It has looked pretty much the same for 15 years or so."

"The area of license renewal should be improved. We normally renew our license every year."

"The user interface could be updated."

"We use the CLI for management, but it's not very good. It's based on Java and it's very difficult to use."

"The UI is definitely one area of improvement because it doesn't match other interfaces and the navigation can be a little clunky."

"Don't neglect that because if you just try to rely on Cisco support you're going to notice pretty consistent slowdowns."

More Cisco Secure Email cons

"There's room for improvement regarding the time frame for retrieving emails."

"Configuring the default strategies and policies in Microsoft Defender for Cloud Apps generates a lot of noise and false positives."

"The pre-sales cost calculations could be more transparent."

"The phishing and spam filters could use some improvement."

"We still see many false positives from time to time with Microsoft Defender for Office 365, so it would be good if we can reduce those false positives and provide better workflows for our end users, as sometimes they may not know what to do when they encounter a false positive."

"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."

"The inbuilt analysis of false positives can be faster. It's not slow, but it can be faster."

"One area for improvement is support, in terms of being able to reach them and, especially, technical support for configuration."

More Microsoft Defender for Office 365 cons

Pricing and Cost Advice

"The solution's pricing lacks transparency."

"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."

"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."

"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 prices are slightly expensive."

"The solution is not that expensive."

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

"We were using Proofpoint and then we switched to Cisco... reportability was one of the main reasons we switched, but the biggest one was cost. If you can get an equivalent functionality for a better price it's wise to do so. That's what our primary decision came down to: We could get equivalent functionality at a lower price point."

"It is an expensive product. I rate its pricing an eight or nine."

"The licensing is a mess and needs sorting out. I am not really concerned about the pricing because I only make recommendations, not buying decisions."

"Pricing depends on your environment and which model you want to buy."

"The license was not per user, the license model was per feature. You could choose anti-virus, anti-spam, etc. It was feature-based and charged yearly."

"As per market availability, this solution is more expensive than other vendors."

"It is a relatively expensive option compared to other alternatives."

"It's adapted to the market. It's similar to other vendors. We at least don't have many problems regarding that because Cisco is adaptable on that side. When we present the solutions to the customers, we tend to achieve the goals that the customer has in terms of the budget for such implementations."

More Cisco Secure Email pricing and cost advice

"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."

"It's a user-base subscription."

"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."

"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."

"I know that the product is incredibly expensive."

"The product is expensive."

"The pricing has become expensive."

"It is much more expensive than using another solution because we have had to include some options and upgrade our license."

More Microsoft Defender for Office 365 pricing and cost advice

See which vendors are best for you

Use our free recommendation engine to learn which Email Security solutions are best for your needs.

See recommendations

903,807 professionals have used our research since 2012.

Top Industries

By visitors reading reviews

Construction Company

19%

Comms Service Provider

10%

Financial Services Firm

Manufacturing Company

Financial Services Firm

12%

Manufacturing Company

Computer Software Company

Outsourcing 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	22
Midsize Enterprise	18
Large Enterprise	27

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...

See all answers

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...

See all answers

What is your experience regarding pricing and costs for Cisco Secure Email?

The pricing structure is good as it is user-based or email client-based, which is positive for clients.

See all answers

What needs improvement with Cisco Secure Email?

The areas of Cisco Secure Email that could be improved or enhanced are the slowness in the console. I don't think it ...

See all answers

What is your primary use case for Cisco Secure Email?

We are using Cisco Secure Email to monitor the outgoing and incoming mail traffic in our financial institute. We have...

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

Comparisons

Cato SASE Cloud Platform vs Cloudflare One

Compared 4% of the time

Prisma Access by Palo Alto Networks vs Cloudflare One

Compared 3% of the time

Zscaler Zero Trust Exchange Platform vs Cloudflare One

Compared 3% of the time

Twingate vs Cloudflare One

Compared 3% of the time

FortiSASE vs Cloudflare One

Compared 3% of the time

More Cloudflare One Competitors

Trellix Collaboration Security vs Cisco Secure Email

Compared 30% of the time

Proofpoint Email Protection vs Cisco Secure Email

Compared 6% of the time

Check Point Anti-Spam and Email Security Software Blade vs Cisco Secure Email

Compared 4% of the time

Fortinet FortiMail vs Cisco Secure Email

Compared 4% of the time

Microsoft Exchange Online Protection (EOP) vs Cisco Secure Email

Compared 4% of the time

More Cisco Secure Email Competitors

Proofpoint Email Protection vs Microsoft Defender for Office 365

Compared 6% 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 4% of the time

Barracuda Email Protection vs Microsoft Defender for Office 365

Compared 3% of the time

Microsoft Defender for Business vs Microsoft Defender for Office 365

Compared 2% of the time

More Microsoft Defender for Office 365 Competitors

Product Reports

Buyer's Guide

Cloudflare One

July 2026

Download Cloudflare One product report

Buyer's Guide

Cisco Secure Email

July 2026

Download Cisco Secure Email 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 Email Security, IronPort, Cisco Email Security, ESA, Email Security Appliances

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 provides email security with advanced threat protection, spam filtering, and easy integration with Cisco Talos, ensuring comprehensive protection against cyber threats like phishing and malware.

Cisco Secure Email offers a comprehensive platform for organizations seeking robust email security. With advanced threat protection and seamless integration with Cisco Talos, it enhances threat intelligence. The tool provides easy-to-use spam blocking and granular policy customization. Effective ransomware, phishing, and malware protection ensures stable network performance. It includes logging and reporting features, along with Active Directory integration, delivering enhanced security without extra hardware. Although it addresses threats efficiently, improvements in synchronization with reporting tools and phishing detection are needed. Organizations find cost and licensing complexities challenging for smaller networks and seek more intuitive configuration, advanced AI threat detection, and comprehensive reporting. Enhanced support, documentation, and cross-platform compatibility are desirable for better management and scalability.

What are the most important features?

Advanced Threat Protection: Guards against cyber threats like malware and phishing
Spam Blocking: Efficiently filters unwanted emails to maintain inbox integrity
Policy Customization: Allows granular control over email security policies
Integration with Cisco Talos: Enhances threat intelligence with global insights
Active Directory Integration: Simplifies user management and enhances security

What benefits and ROI should users consider?

Ease of Use: Intuitive interface provides a straightforward user experience
Network Performance: Maintains speed and reliability while securing emails
Comprehensive Reporting: Offers detailed insights into email threats and responses
No Additional Hardware: Provides complete email security without hardware costs
Enhanced Email Security: Protects against a wide range of email-based threats

In industries like finance, healthcare, and IT, Cisco Secure Email is key to securing email communications. It serves as the primary email gateway in datacenters, scanning and filtering emails to defend against phishing, malware, and spam. Many organizations integrate it with Sophos Antivirus and Talos Threat Intelligence for heightened protection. It plays a crucial role in outbound message control and data loss prevention, ensuring compliance with security policies.

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

SUNY Old Westbury, CoxHealth, City of Fullerton, Indra

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.

Buyer's Guide

Cisco Secure Email vs. Microsoft Defender for Office 365

June 2026

Free Report: Cisco Secure Email vs. Microsoft Defender for Office 365

Find out what your peers are saying about Cisco Secure Email vs. Microsoft Defender for Office 365 and other solutions. Updated: June 2026.

DOWNLOAD NOW

903,807 professionals have used our research since 2012.

See our Cisco Secure Email vs. Microsoft Defender for Office 365 report.

See our list of best Email Security vendors.

We monitor all Email Security reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.