WhatsApp Business API
The common name for the WhatsApp Business Platform: Meta’s official way for software to send and receive WhatsApp messages for a business.
The WhatsApp Business app is for one phone. The WhatsApp Business Platform, often called the WhatsApp Business API, lets software send messages for a business at scale: reminders to hundreds of people, receipts, automatic replies and a shared team inbox.
Businesses use it through a provider such as MsgOrb. Meta charges per delivered template message and bills the business’s own WhatsApp Business Account.