Dialogflow - Conversational UX Platform. (ex API.ai)
Chatbot Templates - 50+ bot templates you can use in one click
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Gomix - The easiest way to build the app or bot of your dreams
Botpress - Open-source platform for developers to build high-quality digital assistants
Chatbots on Hasura - Build and deploy custom chatbots in minutes