Microsoft Bot Framework - Framework to build and connect intelligent bots.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
ChatBot - Easy to use chatbot platform for business
Hubot - Hubot is a standardized way to share scripts between everyone's robots.
Amazon Lex - Harness the power behind Amazon Alexa for your own conversational apps.
Botpress - Open-source platform for developers to build high-quality digital assistants