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The WhatsApp Cloud API is Meta’s own hosted version of the WhatsApp Business API:
  • Meta runs the servers.
  • Meta handles updates and encryption.
  • The business just makes API calls — nothing to install, nothing to maintain.
It’s what ChatSyncs connects to when linking a WhatsApp number. It replaced the older On-Premise API, which required businesses to host their own servers or go through a BSP — On-Premise no longer receives updates, so Cloud API is the standard today for any new connection.

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Frequently asked

No. The Cloud API is fully hosted by Meta — ChatSyncs and your WhatsApp number both connect to it without either side running dedicated infrastructure.
Cloud API is Meta’s current way of hosting the WhatsApp Business API. On-Premise is the older, legacy way of hosting the same API.
For the full comparison against On-Premise, see What Is the WhatsApp Cloud API? in the Meta WhatsApp API reference.