The process for integrating a Twilio Account with WhatsApp is more complex for Independent Software Vendors (ISVs) and System Integrators (SIs) than it is for individual businesses. If you are implementing the WhatsApp Business API on behalf of your end client or a brand that you do not own, this article is for you. In this blog post, I’ll cover the setup process and provide step-by-step instructions to get configured as a WhatsApp ISV or SI, and how to get started with sending WhatsApp messag...