
Google Authenticator
Authy
Lastpass
Azure Multi-Factor Authentication
OneLogin
Okta
Ping Identity
Duo Security provides cloud-based two-factor authentication. Duo’s technology can be deployed to protect users, data, and applications from breaches, credential theft, and account takeover.

Lightspeed
Toast
Heartland Retail
ITSCircle POS
Vantiv
QuickBooksPOS
StoreHub
Square helps millions of sellers run their business-from secure credit card processing to point of sale solutions. Get paid faster with Square. Sign up today!

Which is more popular?
Square might be a bit more popular than Duo Security. We know about 41 links to it since March 2021 and only 33 links to Duo Security.
Website, pricing, platforms and company facts side by side.
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| Website | duo.com | squareup.com |
| Pricing | — | |
| Company | — | Startup from the United States |
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What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Duo Security yet.
Overall verdict
Why this product is good
Recommended for
Square is recommended for small to medium-sized businesses, especially in the retail, food and beverage, and service industries, who need a versatile and scalable payment processing and business management solution. It is particularly beneficial for those who prefer a cloud-based service with seamless integration across multiple devices.
Walkthroughs and reviews on video.
What is DUO Security 2FA and How it Works With Windows Remote Desktop
More videos
Square vs PayPal 2020: A Side by Side Comparison
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Duo Security and Square. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Used by WhatsApp and Etsy, Duo Security was designed with modern companies in mind. That means it prioritizes speed. The DuoMobile app, for instance, simplifies multi-factor authentication. Users can merely tap on a...
If your business needs to process payments in person, Square has handy point-of-sale features like a contactless chip reader, magstripe reader, and convertible stand. All these components let you take payments...
If your business mainly processes card payments in-person in a retail setting, needs a few basic business tools like inventory tracking and sales reports, and is looking for something that seamlessly integrates with...
Square is another big name in retail payments and for a good reason. The easy-to-use platform lets you accept payments online or in-store. There are also useful available features such as invoices, contactless...
Recommendations tracked on public social media and blogs since March 2021.


Take for example a university. Many of them seem to use Duo[1], which is not something you can replace with Google Authenticator or other TOTP app. They require it for students as well as faculty and staff. Is it reasonable for them to... - Source: Hacker News / 4 months ago
The Solution: There are not only one solution to achieve the goal, but this time we choose Cisco Duo as the MFA infrastructure. - Source: dev.to / 9 months ago
Duo.com — Two-factor authentication (2FA) for website or app. Free for ten users, all authentication methods, unlimited, integrations, hardware tokens. - Source: dev.to / over 2 years ago
This is an advertisement and I want to provide all the details.. I am a software developer and avid traveler. I own this website and am the sole developer who wrote the entire software! This idea came about when I signed up for Global... Source: over 3 years ago
And now with Square it's dirt simple to accept credit card transactions, and the software even integrates into the NFC transceiver in modern iPhones--so even street vendors and local artists accept contactless payment cards. Source: almost 4 years ago
Https://squareup.com/us/en - Better with aged account and/or verified business. Do custom amount charges on phone and type in card info manually. Source: almost 4 years ago
When comparing Duo Security and Square, you can also consider the following products.

Google Authenticator is a multifactor app for mobile devices.
Compare Google Authenticator to Duo Security or Square:

Retail point-of-sale, inventory management, and omnichannel payment processing systems.
Compare Lightspeed to Duo Security or Square:

Best rated Two-Factor Authentication smartphone app for consumers, simplest 2fa Rest API for developers and a strong authentication platform for the enterprise.
Compare Authy to Duo Security or Square:

Built to make restaurants better. Toast gives your restaurant the technology you need to succeed in today's fast-paced environment.
Compare Toast to Duo Security or Square:

LastPass is an online password manager and form filler that makes web browsing easier and more secure.
Compare Lastpass to Duo Security or Square:

Heartland Retail (previously Springboard Retail) POS software a robust, user-friendly cloud point of sale solution designed for the business of retail. A complete retail management platform built for growing single, multi and franchise brands.
Compare Heartland Retail to Duo Security or Square: