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They all use third-party service to send those messages through actual WhatsApp clients with real SIM cards (I think each serves around 500 recipients). They al
by germanier 10y ago
They all use third-party service to send those messages through actual WhatsApp clients with real SIM cards (I think each serves around 500 recipients). They also sometimes get blocked by WhatsApp for spamming, loosing customers subscribed to that number. Some examples are https://www.whatsservice.eu/ https://www.whatsservice.eu/ and https://www.whappodo.com/ https://www.whappodo.com/
WhatsApp announced some API for those use cases though.