Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
ChatBot - Easy to use chatbot platform for business