Amazon Lex - Harness the power behind Amazon Alexa for your own conversational apps.
Dialogflow - Conversational UX Platform. (ex API.ai)
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Botpress - Open-source platform for developers to build high-quality digital assistants
Faqbot - Build your chatbot for FAQ, sales and lead generation automation.
Meya.ai - Build, train and host sophisticated bots.