These articles and specifications are the first to read to understand WhatsApp's goals and rules better.

WhatsApp Documentation & Policies

WhatsApp Business API documentation

We highly recommend reading the WhatsApp Business Policy and the WhatsApp Commerce Policy to understand if WhatsApp suits your business needs.

Facebook Business Solution Provider Directory > Category WhatsApp BSPs

List of all relevant WhatsApp Business API Providers

Facebook Business Manager

How to create a Business Manager Account & ID

WhatsApp FAQ

WhatsApp FAQ on Facebook for developers