WhatsApp Business Calling API

Until this feature, a WhatsApp Business API number could only exchange messages; if a customer wanted to talk, they had to leave WhatsApp and dial a phone line. The Calling API adds voice on the same number. A customer taps the call button in the business chat, and the call is delivered to the business's systems over the internet (VoIP) rather than the mobile network. Business-initiated calls are allowed only after the customer grants permission inside the conversation, which keeps the channel from turning into cold-calling. Access goes through the Business Platform and a Business Solution Provider, with the same verification as messaging.

In Saudi Arabia, the UAE and Egypt, WhatsApp is the channel customers already open first, with penetration above 90 percent, so a call button inside the chat removes a real barrier: no international dialling, no separate app, and the conversation history sits right next to the call. For a clinic or a property brokerage this means a patient can message about a slot, tap to call when the question gets complicated, and receive the confirmation back in the same thread. Voice quality depends on the customer's data connection, so a fallback to a regular phone line still matters.

The natural pairing is an AI voice agent: because the call arrives as a VoIP stream, the same Arabic voice agent that answers the phone line can answer the WhatsApp call, look up the customer's chat context, and send the summary or booking confirmation back as a message. Nano AI treats WhatsApp calling as one more channel for its voice agents and WhatsApp agents rather than a separate product. When asking a vendor, confirm whether their BSP has Calling API access enabled, how the agent hands off to a human during a live call, and how call recordings are stored under Saudi PDPL or UAE PDPL.