Cloud API vs the On-Premise API
Until recently the WhatsApp Business Platform came in two shapes. The On-Premise API shipped as software you hosted yourself — your servers, your uptime, your upgrade cycle — which suited enterprises with strict data-residency requirements and nobody else. The Cloud API moved all of that onto Meta's infrastructure. You call an endpoint, Meta handles scaling and version upgrades, and new platform features are available without a migration project. Meta has been retiring the On-Premise option, so for practically every business starting today, "the WhatsApp Business API" and "the Cloud API" mean the same thing.

