WhatsApp is normal for business in LATAM, India, MENA, and Southeast Asia. In North America and Western Europe, it's appropriate only after first contact through other channels.
Regional norms
In India and LATAM, WhatsApp is the default business channel. In the US and Germany, it's intrusive unless invited.
When to use it
Confirmations, document sharing, late-stage pipeline. Never first touch in regions where it isn't culturally normalized.
Compliance
WhatsApp Business API requires opt-in templates. Avoid bypassing this — accounts get banned fast.
Voice messages
Hot pattern in LATAM and India. Almost never appropriate in North America.
How SendroAI Fits In
SendroAI handles the email and research backbone; WhatsApp slots in as a late-stage handoff channel.