Why choose Vonage APIs for passwordless authentication?
Lowest latency everywhere
Vonage APIs are uniquely equipped to ensure your verification codes reach the user in a matter of seconds. Vonage 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
Vonage 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.
Add a simple Interactive Voice Response (IVR) script to your existing applications.
Private Voice Communication
Let your customers communicate via phone call, while protecting their phone numbers.
Track call metadata for lead generation and marketing campaigns.
Try it free
Start developing now with free credit. No credit card required.