WhatsApp OTP messages have approximately 98 percent open rate and are read within 90 seconds of delivery on average. This speed matters significantly when OTPs have a 10-minute expiry window and users must act quickly to complete verification. WhatsApp OTP open rates are far ahead of SMS and email making it the fastest path to a completed verification. Anantya.ai optimizes delivery fu... https://anantya.ai/blog/whatsapp-authentication-guide/