WhatsApp Business Platform Cloud API and WhatsApp Business Platform On-Premises API (known as Business API) are both developed by Meta and provided by 360dialog. They represent the communication layer between the WhatsApp Business Platform and the 360dialog WhatsApp Business Solutions. The main difference is that the Business API can be hosted locally or on-premise while the Cloud API is hosted on Meta's servers in North America only. Technically, both the Business API and Cloud API serve the same purpose, but not the same business size or segments. Both are REST APIs that facilitate the transfer of data between WhatsApp Business Platform and other platforms.