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Chirp provides a powerful API for sending and receiving WhatsApp messages through the WhatsApp Business Platform.

Getting Started

Sending Messages

Receiving Messages

Managing Resources

Key Differences from SMS

WhatsApp messaging differs from SMS in several important ways:
FeatureWhatsAppSMS
Message TypesText, media, templates, interactiveText, MMS
Rich MediaImages, video, audio, documents, contacts, locationImages, video (MMS only)
Message TemplatesRequired for initiating conversationsNot required
User Opt-inRequiredCarrier-dependent
Read ReceiptsSupportedNot supported
Interactive ElementsButtons, lists, quick repliesNot supported
WhatsApp requires users to opt-in before you can message them. For outbound notifications, you must use approved message templates.