Dear Sir,
I have my own developed solution for WhatsApp Message sending API.
I understood your requirement & can integrate it to automate bulk message sending.
I can provide you Greatest Deal Here!!
Will charge up to 5 times less than Twilio API for sending Whatsapp messages automatically.
Also I can provide you better deal than any 3rd party Chat Bot providers like Message Bird.
Will deliver following features:
WhatsApp Api Development
Send WhatsApp Message to Unlimited Mobile Numbers
Receive Unlimited Message without any cost
Dynamic Message Creation
I have recently built a WhatsApp Chatbot for a govt. project. I can show you that as well.
Please initiate chat so that we can discuss further.
Best Regards