Voice Based Otp Services
Sinch provides voice-based OTP (One-Time Password) services that increase security by way of automated calls. Rather than depending on SMS, customers are presented with a voice call that delivers a specific OTP, with the promise of greater success rate and ease of accessibility, particularly for users with minimal internet connectivity, thereby ensuring safe authentication in real-time.
Read more: https://sinch.com/in/products/voice-calling/