Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Dialogflow - Conversational UX Platform. (ex API.ai)
blockslack.io - Chat for small teams — encrypted and decentralized
Hie Chat - Know what your friends are doing and chat without typing
Botpress - Open-source platform for developers to build high-quality digital assistants
Nicegram - The all-in-one AI-enhanced Telegram client elevating your conversations!