The short answer
The WhatsApp Business API — also called the WhatsApp API or the WhatsApp Business Platform — is Meta's official way for businesses to use WhatsApp at scale. Unlike the free WhatsApp Business app, which runs on one phone, the API lets a whole team answer one number, run chatbots, send broadcasts to opted-in customers and connect WhatsApp to your own software, such as SAP Business One, Shopify or WooCommerce.
Meta provides the API itself but no inbox or chat screen. In India you get it through an official Meta partner. With Lead Pattern, the total cost is your plan (from ₹1,500 a month, or ₹15,000 a year), plus Meta's message fees at cost with zero markup, plus GST. Setup and green-tick help are free, and the Growth plan has a 14-day free trial with no credit card. There is no free plan.

