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.
Botsify - Ever wonder if you could replace your live chat support system with a chatbot?. Its possible now with Botsify Chatbot For Website.
Facebook Messenger - Facebook Messenger is a faster way to message.
ManyChat - ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.