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Cisco Duo vs Cisco Secure Email comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

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

ROI

Sentiment score
6.7
Cisco Duo enhances security, reduces threats, lowers costs, and boosts morale with efficient multifactor authentication, yielding substantial ROI.
Sentiment score
6.4
Cisco Secure Email enhances ROI with robust security, reducing disruptions and downtime from cyber threats, despite perceived high costs.
I think Cisco Duo offers a good return on investment for startups, newer organizations, or those utilizing cloud-based applications.
Identity and Access Management Principal at Mobily
I have not seen ROI with Cisco Duo; probably the opposite, because it impedes productivity time to be able to get into the system.
Network Engineer at West Kentucky Rural Electric Cooperative Corporation, Inc.
From my point of view, the biggest return on investment when using Cisco Duo is the security and the ease of setting it up.
Chief Technology Officer at University of Redlands
 

Customer Service

Sentiment score
7.1
Cisco Duo's customer service is generally positive, with quick responses and strong documentation, but some users note delays.
Sentiment score
7.3
Cisco Secure Email support is praised for its responsiveness and expertise, though experiences can vary based on assigned engineers.
They got back to us quickly, were nice, and gave us what we needed.
Infrastructure Engineer at a government with 501-1,000 employees
I would rate their support 10 out of 10.
Senior Network Engineer Specialist at Zenith Comp Co.,Ltd.
I would rate support for Cisco Duo a 10, as I have never had a negative experience.
Information Technology Contractor at Insight global
Cisco's tech support can be hit or miss, depending on the engineer you get.
Cloud Partner & Solutions Architect at a tech vendor with 1,001-5,000 employees
The support is pretty decent, with a rating of eight out of ten.
Chief Information Security Officer at Abcl
 

Scalability Issues

Sentiment score
8.1
Cisco Duo is highly regarded for its scalability, flexibility, and seamless integration, efficiently supporting diverse organizational needs.
Sentiment score
7.2
Cisco Secure Email provides scalable solutions for seamless user migration and system growth, with reliable cloud service options.
In my last contracting position, it was a large one for a major worldwide airline that had hundreds of thousands of devices that could use Cisco Duo, and it scaled very well.
Information Technology Contractor at Insight global
I believe Cisco Duo is very scalable because it is cloud-based.
Identity and Access Management Principal at Mobily
We started out with just the basics, getting a token, and then we changed to push, and now, we have added the offline mode.
Network Engineer at West Kentucky Rural Electric Cooperative Corporation, Inc.
The on-premises hardware is not very scalable, but switching to the SaaS offering is expected to improve scalability.
Chief Information Security Officer at Abcl
 

Stability Issues

Sentiment score
8.3
Cisco Duo is highly stable, with rare outages, positive user feedback, effective communication, and proactive updates ensuring reliability.
Sentiment score
8.0
Cisco Secure Email is praised for reliability, consistent performance, easy maintenance, and high user satisfaction with stable uptime.
We have not had any Cisco Duo outages across all the companies I have worked for that utilize Cisco Duo.
Senior Engineer at Frontline Fighter Ltd
When there is a bigger problem, we get notifications from Cisco Duo saying, 'Hey, we have a problem,' and that has helped us.
Network Engineer at West Kentucky Rural Electric Cooperative Corporation, Inc.
We have never experienced any downtime.
Vice President at Next Info Tech Solutions Inc
Based on my experience, the stability of Cisco Secure Email is very strong.
Systems Engineer at a non-tech company with 51-200 employees
 

Room For Improvement

Cisco Duo users seek improvements in telephony, integration, pricing, on-premise support, authentication speed, and legacy system compatibility.
Cisco Secure Email's high cost, complexity, poor interface, and limited integration impact usability, requiring AI and service enhancements.
If you don't have internet access, you can't access your computer, only local access is available.
Security and Network Team Lead
It lacks some dynamic identity management features compared to other products such as SailPoint.
Senior Iam Associate at Cognizant
Cisco should allow easier integration with third-party equipment because Cisco's own equipment is expensive.
Procurement Officer at Emerging Systems
The solution should better analyze the actual content rather than only focusing on the email header or origin.
Chief Information Security Officer at Abcl
It would be beneficial to have the functionality of the Email Threat Defense integrated into the Email Security Gateway so customers don't have to buy two products for full email protection.
Systems Engineer at a non-tech company with 51-200 employees
 

Setup Cost

Cisco Duo offers affordable, flexible pricing for enterprises, balancing cost-effectiveness with premium features and scalability for user needs.
Cisco Secure Email is priced higher, but users find its extensive features and security benefits justify the cost.
The pricing is acceptable to them.
Vice President at Next Info Tech Solutions Inc
Their website lists $3 per month per user for the Essential license.
Senior Network Engineer Specialist at Zenith Comp Co.,Ltd.
One of my customers recently received a billing statement charging 3,600 US dollars for 100 users for one year.
Sr. Network Security Engineer at Topnet Internet Services Provider. Riyadh, Saudi A
Its cost is bundled with other Cisco products.
Chief Information Security Officer at Abcl
The licensing is a mess and needs sorting out.
Cloud Partner & Solutions Architect at a tech vendor with 1,001-5,000 employees
The pricing structure is good as it is user-based or email client-based, which is positive for clients.
Systems Engineer at a non-tech company with 51-200 employees
 

Valuable Features

Cisco Duo offers seamless integration, multi-factor authentication, geo-locking, and intuitive management for robust network security and identity verification.
Cisco Secure Email provides comprehensive threat management with advanced filtering, intuitive management, and seamless integration, enhancing email security effectively.
From a management perspective, I appreciate that we can enroll or control devices on the back end for people who get a new phone and forget to handle Cisco Duo properly and need to add a new device.
Network Engineer at a educational organization with 501-1,000 employees
Our company benefits from all those features of Cisco Duo with confidence, and we feel very secure with it in terms of authentication of our logins.
Vice President at Next Info Tech Solutions Inc
The benefit of having a complete passwordless environment in our organization is that it's gotten people away from using the sticky note under their keyboard - which is a huge problem.
Director, Technology at Deer Creek High School
It also possesses multiple modules for spam detection, malware detection, and threat intelligence, which are valuable in categorizing emails and determining actions.
Chief Information Security Officer at Abcl
It is highly effective in catching phishing and spam emails.
Systems Engineer at a non-tech company with 51-200 employees
It covers everything through email, like antivirus, IDS, and IPS.
Cloud Partner & Solutions Architect at a tech vendor with 1,001-5,000 employees
 

Categories and Ranking

Cisco Duo
Ranking in Cisco Security Portfolio
2nd
Average Rating
8.8
Reviews Sentiment
7.2
Number of Reviews
86
Ranking in other categories
Single Sign-On (SSO) (3rd), Authentication Systems (2nd), Access Management (4th), ZTNA as a Service (3rd), Multi-Factor Authentication (MFA) (1st)
Cisco Secure Email
Ranking in Cisco Security Portfolio
6th
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
62
Ranking in other categories
Email Security (5th)
 

Mindshare comparison

As of January 2026, in the Cisco Security Portfolio category, the mindshare of Cisco Duo is 8.0%, up from 4.4% compared to the previous year. The mindshare of Cisco Secure Email is 3.7%, up from 1.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Cisco Security Portfolio Market Share Distribution
ProductMarket Share (%)
Cisco Duo8.0%
Cisco Secure Email3.7%
Other88.3%
Cisco Security Portfolio
 

Featured Reviews

Charles Slaustas - PeerSpot reviewer
Information Technology Contractor at Insight global
Supports seamless authentication for users across multiple organizations and personal portals
The features I use in Cisco Duo include Duo Pushes to confirm my identity to the device, and eventually as MFA security was increased, I actually had to use exchange passcodes. Sometimes, I have to go into the site and get into Cisco Duo to retrieve the passcode, and many of them have been two-factor, where the sites send a passcode that I have to enter into Cisco Duo. It has been more of the latter. I have not seen issues with lagging or crashing on Cisco Duo's end; it was usually on the client end, often because someone set up a bad upgrade or there were connection issues with the Cisco Duo cloud through the administrative site.
BD
Chief Information Security Officer at Abcl
Threat intelligence with fast attack detection enables comprehensive email protection
In some cases, detection is missed, leading to false positives where genuine emails are flagged as spam. This could result in users not opening genuine emails. We have highlighted this to Cisco because sometimes phishing or marketing campaigns, which are genuine, are incorrectly flagged as spam. The solution should better analyze the actual content rather than only focusing on the email header or origin.
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Top Industries

By visitors reading reviews
Manufacturing Company
11%
Computer Software Company
10%
Comms Service Provider
7%
Government
7%
Computer Software Company
17%
Manufacturing Company
9%
Financial Services Firm
8%
Comms Service Provider
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business31
Midsize Enterprise18
Large Enterprise40
By reviewers
Company SizeCount
Small Business22
Midsize Enterprise18
Large Enterprise25
 

Questions from the Community

How does Duo Security compare with Microsoft Authenticator?
We switched to Duo Security for identity verification. We’d been using a competitor but got the chance to evaluate Duo for 30 days, and we could not be happier. Duo Security is easy to configure a...
What is your experience regarding pricing and costs for Duo Security?
My experience with pricing, setup cost, and licensing reveals that one of the most powerful features is the licensing model and the price. According to the pricing, it is really fantastic to get th...
What needs improvement with Duo Security?
One downside of Cisco Duo is the expense, as there are clients that can afford only the basic package, which does not include Geo-fencing, leaving them unable to pay for the more expensive level, w...
What do you like most about Cisco Secure Email?
Cisco Secure Email is a budget-friendly solution.
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.
What needs improvement with Cisco Secure Email?
The user interface of the Email Security Gateway ( /products/security-gateway-reviews ) should be improved. It would be beneficial to have the functionality of the Email Threat Defense integrated i...
 

Also Known As

Duo Security
Cisco Email Security, IronPort, Cisco Email Security, ESA, Email Security Appliances
 

Overview

 

Sample Customers

Information Not Available
SUNY Old Westbury, CoxHealth, City of Fullerton, Indra
Find out what your peers are saying about Cisco Duo vs. Cisco Secure Email and other solutions. Updated: December 2025.
881,082 professionals have used our research since 2012.