We’re excited to announce the General Availability (GA) of Silent Authentication in Verify, enabling user verification with minimal friction and maximal security. After months of beta testing, Silent Authentication is stable, scalable, and production-ready.

What Is Silent Authentication?

Silent Authentication verifies a user’s phone number by analysing carrier traffic, without requiring input of a one-time code. By removing unnecessary steps from the authentication flow, it significantly improves the user experience and reduces drop-off during sign-in or onboarding. This makes it ideal for mobile apps and services that need a fast, low-friction way to verify real users.

GA includes expanded carrier coverage, improved fallback logic for variable network conditions, enhanced monitoring and observability, and fully updated SDKs across platforms.

Silent Authentication is available today for all customers.

Why It Matters

Manual One-Time Password (OTP) input slows users down, increases cognitive load, and often leads to drop-off, especially on mobile applications. Silent Authentication eliminates these barriers by enabling background verification that is secure. 

The result: higher conversion rates, more successful sign-ins, and a more polished, modern experience for your users.

How to Get Started

Silent Authentication can be easily enabled in your workflow with a single step. Here’s a sample API request to enable Silent Authentication in your verification workflow:

HTTP POST https://api.nexmo.com/v2/verify/   
{
     "brand": "ACME Inc.",
     "workflow": [
       {
         "channel": "silent_auth",
         "to": "44770090000"
       }
     ]
   }

Explore the documentation and follow our step-by-step tutorial to integrate Silent Authentication into your mobile app in just minutes.

Next Steps

To learn more about Silent Authentication, head to our Verify API documentation and check the API Reference for further details.