WhatsApp Chatbots by SendPulse - No-code chatbots and shared inbox for WhatsApp
GetChat.App - Add WhatsApp chat to your website for free
WhatsApp Business - Communicate more efficiently with your customers
Smooch.io for Facebook Messenger - Message your customers from Slack, Front, a bot or anywhere!
WATI - No-code chatbot builder for WhatsApp Business
Avochato - Text messaging for your business.