Simplify mobile
number verification
and onboarding

Use the free Truecaller SDK to
verify mobile numbers without
unreliable OTP SMS.

Sign in with Truecaller
Used by top developers
times of india

Reduce drop-offs
while onboarding

Complete verification in seconds

Same user across
all your apps

One user, one verification

Genuine user
details auto-filled

Trusted Truecaller mobile identities

With Truecaller SDK
  • Tap “Sign in with Truecaller”
  • Share profile
  • User number verified without OTP & profile auto-captured
  • Less than 5 seconds
Without Truecaller SDK
  • 5-10sEnter mobile number
  • 10-30sWait for OTP, try resend upon failure
  • 10-30sManually fill registration form
  • 30-60 seconds in total
"No mobile identify toolkit is simpler than Truecaller SDK. It was quick to setup and we could go live within a day. Eliminating OTP step while signup was a dream come true. I strongly recommend using Truecaller SDK to every mobile first company out there."
Rishikesh SR - Co-founder, Rapido
of all users onboarded via Truecaller
increase in ride booking

"Truecaller SDK enabled us to obtain verified user identities, right at the time of signup, significantly improving sign up rates while reducing hurdles associated with OTP based registration processe...

Gaurav Agrawal - Co-founder & CTO, 1mg

"At OYO, we have been expanding globally at a rapid pace. Improving user experience during authentication has been a key area of focus. This integration with Truecaller presented us with an opportunit...

Mukund Laddha - Product Manager, OYO

Truecaller SDK

For Mobile Apps
Android, iOS, React Native
For Web Apps
Mobile web, Progressive Web apps
Get Started