About Duo Security
Duo Security's multi-factor authentication gives your users easy, one-tap access to applications, securing against credential theft.
It does a great job of being straightforward and keeping your accounts secure. It provides new codes on a 30-second basis, making it difficult for hackers to do what they do.
If I close all of my internet windows, I have to re-certify everything again so that can be annoying. Also, I purchased a new cell phone after several months of using Duo.
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Filter reviews (466)

Matthew
Simplified Security
Comments: I enjoy the endpoint security perspective of the application coupled with the simplistic user interface - this is very good for non-tech users working remotely.
Pros:
I like that Duo let's you know what might compromise your experience on a platform. It tells you to upgrade your android/iOS handset and gives a severity level. This is great from an endpoint security perspective.
Cons:
At times - the app takes a little time to prompt the user that an attempt is being made. This may be a function of slow infrastructure, but it is hard to assess.

Stephen
Alternatives Considered:
Security to fill a gap, but not comprehensive offering
Comments: Duo Security is a strong SaaS product to fill the very specific infrastructure gap of 2-factor authentication for infrastructure.
Pros:
Duo Security is a great product to fill a very specific gap in infrastructure security, specifically for SSH management. For requirements for 2-factor authentication for SSH, Duo is quick to implement
Cons:
Duo is difficult to enroll users with, which creates a significantly higher administrative overhead than other options. There are also significantly more delays in the Duo pushed-based notification systems (depending on the user and their network, etc.), which can cause issues for users authenticating.
Zachary
A simple solution that works
Comments: Duo Security performs as it claims and works well. It's simple, and I don't have to think when using it, which is great.
Pros:
I like the convenience factor most. Some two-factor authentication solutions take some time (entering a code, etc.), but I love how Duo has an Apple Watch widget that allows me to make a single click to authenticate. I also appreciate the simplicity of the UI. I also like the QR code pairing that some sites have to set up the Duo config. It's quick and easy.
Cons:
I have no complaints, so it's difficult to write about what I like least. If I were forced to make a suggestion, it would be to make the mobile app more visually appealing.
Aaron
If DUO doesn't work, expect your company to be shut down for an unknown amount of time
Comments: I was solving authentication, I will be investigating switching to another MFA solution as soon as possible.
Pros:
Our company switched Managed Service Providers, and we used DUO. When we switched over, DUO authentication stopped working. We had multiple users who DUO simply stopped working for. We and our MSP were unable to contact DUO support after multiple hours. I did get through to a person who put the phone down and appeared to be watching a video on YouTube in the background for about 10 minutes and then hung up on me. This had a serious negative impact on our business and I'm surprised that we were unable to get anyone to assist at all with such a business critical feature.
Cons:
That when support is needed you can spend multiple hours on hold without any assistance. When someone does actually pick up the pick up the phone and place it on their desk and do not actually answer the call.
Jorge Mario
Flexible and Easy to Implement MFA
Comments: We use Duo to provide better security to our end users and to comply with regulatory requirements. The solution is inexpensive, easy to use and integrate with the existing applications.
Pros:
Duo is a cheap, flexible solution that allows a company to easily implement MFA on corporate applications.Pros: - Out of the box integrations with applications such as Office365, Salesforce, Microsoft ADFS, etc.- Adding users is easy, with several enrollment methods (automatic, email based, sms based, etc.)- Using the application is easy, it is just a matter of accepting a push, or entering a numeric code.
Cons:
So far I haven't had any issues with the solution. It was implemented for Office365 and ADFS in less than an hour.
Shannon
Great Security
Comments: Never had any problems with Duo. I broke my phone once and couldn't authenticate myself to get into any important accounts since it was all tied to my phone only. Duo allowed me to get into my accounts that day fairly easily by giving me temporary backup codes until my phone was fixed.
Pros:
Duo is simple to use, user friendly, and does all that is needed for authentication. I work with multiple large organizations that have chosen to use it for their employees. It is easy to pair duo with new organizations as well.
Cons:
So many authentication apps exist, that it is hard to distinguish between them. Duo works great, but so does basically every other authentication method in the app store.
Verified Reviewer
Does exactly what it does!
Comments: Really, my experience is very positive. When I am disappointed, it is usually because it work well All The Time so I expect to be perfect, but perfect it a high bar to set for anything. I use three different Dual Auth apps and three physical tokens for different applications and Duo it in the top two in terms for favorite in ease to use.
Pros:
The PUSH to mobile functionality is just about as easy to use as you can get. Also, I can use the same app for different authentication of different unrelated systems.
Cons:
The Duo PUSH does not ALWAYS work 100% of the time, but does work 90%. Usually when inside or around electronics, but that is to be expected like with text messages or regular phone calls.
Gabriel
Duo Review
Comments: Overall Dou mobile does a great job at storing access codes and having easy access to them.
Pros:
The product is very simple and easy to use. After the one-time setup to any 2fa-enabled website or application, you only copy the access code and you're in. The implementation with Canvas, which Oregon State University requires, is seamless. After inserting the university's login information, a notification is sent to the device of preference. You only have to click a button and you're in. This one-click access is dependent to applications that support it, otherwise a copied code is required.
Cons:
For mobile application: The only concern is the application doe not have the ability to enable lock, such as FaceID or fingerprint. Therefore, other individuals could access those codes if the phone is unlocked.
Mayowa
I love the different options provided for authentication
Pros:
I love the different options provided for authentication such as duo push, phone code, and phone call. These options make it more accessible to use the software. In instances where I can't use my phone, I can simply use a code for authentication. I also like that some sites allow me to authenticate just once a week as opposed to every time. Furthermore, I like how it can connect to my other devices. I often use my Apple watch to accept the Duo code and it makes it just much easier to use.
Cons:
Sometimes the code doesn't work and I have to write down a bunch of code to find one that works
Verified Reviewer
Never had problems
Comments: Overall positive, no one could enter my account or access my data thanks to it
Pros:
I liked the possibility of accessing my E-Learning profile in a safe way, protecting my data, with a simple click on my phone
Cons:
I wish I could use it on my laptop or that I could press on authenticate without having to unlock my phone. It can be annoying when I am very busy or when my phone is not next to me
Barry
Alternatives Considered:
Duo Security - Easiest DFA hands down
Comments: We love Duo Security. The implementation on our remote servers and web servers gives us piece of mind knowing that our important infrastructure is secured with DFA/2FA (Dual or two factor authentication). It's very easy to setup DFA on a remote server which is good too.
Pros:
I like the integration with mobile and smart watches. I use Duo on a daily basis to login in to servers and online services. What I love the most is that as long as I'm wearing my smart watch I can approve logins directly from it. No passwords, no pins, biometrics needed. The authentication push is instantaneous which keeps the login on the target device/service from timing out.
Cons:
What I like least is the quality of the hardware tokens. They don't seem to last very long (less than 1 year) and have to resync'd once or twice annually. For me this is no longer an issue because I authenticate using mobile or smart watch pushes. It would be nice to know that if my watch or phone were to die that the token is always reliable.
Wendy
A must have for security and log in authentication
Comments: Definitely very satisfied with it. It is a very universal and must needed tool for companies to use at work to ensure their log ins do not get hacked by other people as the notification is sent directly to you and no one else. It is very user friendly and very straight forward. A must download!
Pros:
I use this daily at work when I log into my work email and work related websites. It is a very handy program (I download the app onto my phone) and whenever I log in, it would send a ping to my app on my phone which I then use to approve the log in, and then it allows me to log in. This is a sure way to prevent others from hacking into your log and ensures the highest level of security. All the employees at my company/hospital use it and we all highly recommend it! It is very straightforward and very easy to use!
Cons:
None whatsoever, the program is so user friendly and very straightforward. Definitely a must have for security use for logging in at work or public computers.
Anindita
Duo Security: Secure yes but keep phone close
Comments: Maybe Duo should incorporate other ways to allow access alongside mobile devices. The reason being many a time mobile phones are not connected to the internet or not in the vicinity.
Pros:
Our university switched to Duo securities some time back for authentication purposes. Security, of course, increased several folds. Also, Duo allowed multiple login/authentication. The enhanced security becomes very prudent when dealing with sensitive data.
Cons:
Be ready to keep your mobile phone close to you when you want to access the accounts that need authentication via duo. My biggest issue is the extreme dependence on mobile phones. If the phone is lost or not in your vicinity, it becomes cumbersome to log in. Also, once you login the software sends a push notification to your mobile. The duration that push notification remains active is significantly less. There have been many instances when a notification was pushed to my mobile device, and my device was not within my reach. By the time I retrieve my device, the push notification expired.
Cory
Easy to Use and Effective
Comments: I am able to log in remotely and do my work from home, which has been very important with the pandemic.
Pros:
It is very easy to go to the app and generate a code on my device that I can then type into my login screen for my work laptop. Within seconds, I'm able to securely log into my system and be connected remotely. It is much more user-friendly and hassle-free than the last software we used for it.
Cons:
I don't have anything specifically bad to say about this software . It does what I need it to do and it hasn't caused any issues.
Verified Reviewer
Secure but Time-Sensitive
Pros:
I use Duo on a daily basis to login to my company's VPN and again for internal company resources. Once it's setup it's pretty easy to use. I appreciate that it syncs with my phone so I can just click a button on my phone to ensure it is me.
Cons:
I have to login to Duo twice a day and I usually do it at the same time. If I do them too closely together, one of them will say it timed out and I have to start the process all over. If I close all of my internet windows, I have to re-certify everything again so that can be annoying. Also, I purchased a new cell phone after several months of using Duo. It did not recognize my new phone and kept sending my codes to my old phone. It was a frustrating process to reconfigure everything to log on for work. On top of that, I don't love that I have to use my personal device to log on to my work device. It's another app that takes up space on my personal phone.
Scott
An added layer of security when working remotely
Comments: Duo Security offers us the ability to work away from the office with minimal fear of having sensitive material exposed to unauthorized users. Working from home is often essential, so I'm glad we have Duo Security to help make it possible.
Pros:
Duo Security effectively enables users to securely access their organization's network. Once you've signed in on your computer, a push notification is sent to your smartphone. Just click to approve it, and you are securely connected to the network. An unauthorized user would be unable to gain access without having possession of your phone. I appreciate that it's generally a quick, no-hassle process; signing in takes only a few seconds.
Cons:
Occasionally it takes a couple of attempts to sign in to the network. Additionally, it can be inconvenient to need to have your phone handy whenever you sign in. I've had my phone charging in another room when I realize I have to go get it in order to sign in.
Jen
Easy to use
Comments: Duo helps us to maintain a secure login to our sites. We use it to access payroll information, reports, our shared drive, and other things you want extra security around.
Pros:
I like the fact the fact that Duo is so easy to use. You can it up to verify in different ways - through an app, a call, or email. I sue the app which I love. A simple swipe and accept and you are in your site securely. For computers that are secure and you use regularly you can have it remember you for 30 days which is very convenient for sites you use multiple times a day.
Cons:
I really don't have any complains about the software. It works great for my purposes. The only thing I have heard people complain about is just two step verification in general.
Verified Reviewer
Easy in practice, maybe a little pricey
Comments: Support is good. New features are rolled out occasionally, so being an admin it is a good idea to keep up-to-date about it.
Pros:
Working on the end-user side of things is very easy. Just "allow" a login, no hassle with codes. Also having the (Apple) Watch app available means users always have a device very near. On the admin side of things the configurability is impressive. We are running a sync with or AD so provisioning users is automatic.
Cons:
It is a bit pricey as ie.e Azure MFA does most of the things as part of the EMS bundle (so if you have that, that is an option). Also on the end-user side, I find the Apple Watch is a little lagging (couple of seconds). Not a big issue, but a little annoying sometimes.
Verified Reviewer
Super easy to use mobile 2-factor authentication software
Comments: I have been using it for over 2 years and have never had an issue. It is very easy to use.
Pros:
The way it connects to Cisco AnyConnect VPN so that I can safely connect to my work's network. I don't have to worry that someone will get into their network via my account because Duo is tied to my cell phone. It's very easy to use, you just open the app, click the show button on the 6 digit code, and punch that into AnyConnect when you try to connect. They also have an apple watch app so that you can receive the notifications on your watch to log in.
Cons:
No qualms. It does what it's supposed to and does it in the most lightweight and streamlined way possible.
Verified Reviewer
1-click for Two-Factor Authentification
Pros:
I have been an end user of Duo Security for the last 2 years, and I think that this is the best software for 2-factor authentification. The Duo App has a simply designed platform. When we sign into the website that requires authentification, we can just type a passcode provided by Duo App on the website or click an authentification request given by Duo App. Yes, it is that easy with Duo.
Cons:
Setting up the Duo from the scratch can be challenging to some people who are not familiar with two-factor authentification. It is important for organizations or companies to provide a step-by-step installation procedure to users before they start using Duo as their sole authentification method.
Tara
DUO for Work and Students
Comments: It is very easy to use. I have not had any issues using it or getting connected.
Pros:
Working in Higher Ed and files and documents for the students needs to be secure. I appreciate the ease and use of DUO. Having dual authentication to log into email and software gives me the assurance that it will not be easy for someone to pick up a phone to access personal files, but has to have access to another device to authenticate the login.
Cons:
Everytime I log into my email, I have to wait for the pop up to authenticate the DUO screen to access my mail. Sometimes my phone is not near me and I have to stop what I am doing to log in to the email or other campus software.
Verified Reviewer
Simple dual-factor authentication for university
Comments: Overall, the benefits of Duo Security outweigh the inconveniences, which are small. I use it as a graduate student to protect my employment information.
Pros:
Duo Security is generally very simple to use with a smartphone. When WiFi is available, it's as simple as pulling out my phone and accepting a push notification. It gives me peace of mind that my account is more secure.
Cons:
When your phone isn't getting good WiFi, Duo gets a little tedious. I don't store the app on my main screen, so I have to go into a back folder and find a code to enter in. I also would prefer to have permanent access if I okay it, rather than having to update access every 30 days.
Delaney
Good Protection, Occasionally Frustrating
Comments: Duo makes your information safer, and it does help make you feel more comfortable with the information you have online, but it does have flaws and takes time to fully complete the authentication process that is not there otherwise.
Pros:
Duo security is an app on your phone and a computer program, so it is versatile and helpful in protecting your passwords and various accounts. In school, it is a great way to protect tuition information, grades, and various other lovely stuff we do not want people to know.
Cons:
The app can sometimes lose connection with the cloud, so an authentication won't go through, or there can be issues where the app does not receive a push or a request. This can be difficult as there is no direct way to troubleshoot, you just have to restart the process.
Verified Reviewer
Easy to use MF authentication
Comments: I have used Duo Authentication at two institutions now as a two-factor authentication means. It is very easy to use and even less tech-savvy coworkers find it easy and straight forward to use.
Pros:
Once Duo is set up, it's super easy to use, whether responding to a push notification or generating a one-time use password.
Cons:
When attempting to change preferences in a browser to allow it to retain your login status, you must cancel an initial automatic push from the authentication screen in a browser, check a "remember me" box, then wait some time before attempting another push. This is a security measure, but a minor annoyance when trying to quickly make a change and move on.

Sandeep
Excellent security app for authentiction
Comments: This is the best security feature for authentication. It makes sure no one else logins to your account but only you. The main benefit of this software is that our work done till date is secure in our machines.
Pros:
The best thing about this software is that we can not login to our work station until and unless we pass through Duo Security. There is a mobile app for this which makes it easy to authenticate. We just need to tap "Approve" on the login request sent to mobile app. there are three types of login. One can choose any type based on our convenience. One can login using passcodes, call on spot or just clicking approval system.
Cons:
There was issue when I lost my mobile phone and I wanted to configure duo again to login to my work station. Adding account was so time consuming that I had to wait for the Administrator to add my account again. If administrator is on leave then we have to wait for another complete day to login to work station.