Kolkata is rapidly evolving into a digital hub — from fintech startups and e-commerce brands to educational institutes and healthcare providers. Yet, many still rely on outdated SMS or email OTP systems that are slow, unreliable, and insecure. If your customers don’t receive OTPs instantly, they abandon sign-ups, transactions, or checkouts — costing your business revenue and trust.That’s where WhatsApp API for OTP in Kolkata revolutionizes authentication. With verified Meta-approved business messaging, you can deliver OTPs in under 3 seconds, ensuring a frictionless and secure customer experience.But here’s the challenge: SMS OTPs often fail or arrive late due to carrier delays. Email OTPs go unnoticed or end up in spam folders. Customers lose trust when authentication feels slow or unsafe