Hmmm…interesting list. I however was thinking that you may want to include Engati as well. Engati is a chatbot platform that allows you to build, manage, integrate, train, analyse and publish your personalized bot in a matter of minutes. It presently supports eight major messaging platforms including messenger, kik, telegram, line, viber, skype, slack and webchat with a focus on customer engagement, conversational commerce, and customer service and fulfillments.
ChattyPeople helps you build custom chatbots for Facebook and Slackbot. The platform can teach you the skills you need to make chatbots. It makes custom chatbots for small businesses, e-commerce, and enterprises. ChattyPeople thus creates, tests , deploys, and manages the bots within the chosen messaging app. It also provides you bot analytics to optimize the customer experience.