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Passwordless Authentication

Replace static passwords with single use codes sent over SMS, voice or push

Try it freeContact Sales

BENEFITS

Convenience without compromising security

Great user experience
  • Let users conveniently gain instant and secure access to your app with just their phone.
Comprehensive
  • Reliably works with any type of phone line anywhere in the world with a single API.
Clear value
  • Pay only when users successfully access your application.
How it works

Ensure security by delivering time-limited, single-use authorization codes to known numbers

User starts app
The user taps a button to request a verification code when they are ready to login.
Verify delivers a single-use login code
Nexmo Verify delivers a one-time-use code to the user’s registered phone via SMS, voice, or push notification.
User enters the code
The user demonstrates that they hold the registered device by entering the received code in the app.
Verified users gain access
The app confirms that the entered code is correct and allows the user to login.

BUILDING BLOCKS

Programmable elements used in this solution

Send Phone Verification Code
Check Phone Verification Code

TUTORIAL

Step-by-step guide to building passwordless authentication

Start Building

HOW CAN NEXMO HELP?

Heavy lifting done for you
Nexmo Verify API provides the user authentication management backend so you don’t have to build it. The Verify SDK also provides a customizable user experience framework so you can easily create the UI in your app from pre-built elements.
Lowest latency everywhere
The Nexmo Platform is uniquely equipped to ensure your verification codes reach the user in a matter of seconds. Nexmo has more direct carrier relationships than any other provider, ensuring the lowest number of hops.
Intelligent conversion optimization
Our Adaptive Routing algorithm continuously monitors message delivery performance all around the world, to automatically find the best routes for your message. And we provide a seamless escalation, from re-tries to text-to-voice, until the user converts.
Local compliance at global scale
Our Compliance Engine keeps track of the many different regulations imposed by countries and carriers on SMS, then intelligently ensures your messages won’t be blocked or filtered for being in the wrong format.
Pay only for success
You pay only when your users successfully login. We’ll keep trying (at no cost to you) via SMS, and then failover to text-to-voice to ensure your users get access when they want it.
Heavy lifting done for you
Nexmo Verify API provides the user authentication management backend so you don’t have to build it. The Verify SDK also provides a customizable user experience framework so you can easily create the UI in your app from pre-built elements.
Lowest latency everywhere
The Nexmo Platform is uniquely equipped to ensure your verification codes reach the user in a matter of seconds. Nexmo has more direct carrier relationships than any other provider, ensuring the lowest number of hops.
Verifying our users is business-critical, and we required an authentication partner that could help us achieve the highest possible conversions. Nexmo went above and beyond our expectations, and we only paid for successful verifications - something no other vendor was able to provide.
Darrell MacMullin
CEO, BitGold

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THE NEXMO EXPERIENCE
Quality, Support, Scalability
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