Dialogflow - Conversational UX Platform. (ex API.ai)
CometChat - Seamless Real-Time Chat Integration for Your Applications.
Botpress - Open-source platform for developers to build high-quality digital assistants
HappyFox Chat - HappyFox Chat is a live chat software for the websites.
Meya.ai - Build, train and host sophisticated bots.
Taskworld - Taskworld is a cloud-based collaboration platform that increases productivity, engagement at work.