What is an open source alternative to wit.ai?


What is an open source alternative to wit.ai?

I have listed many alternatives in my Quora question, below.  However, most are web APIs (which is my preference).  There are open source dialog systems with APIs, such as Program-O and ChatScript.  However, in terms of automated virtual assistants and Internet of Things, we are increasingly seeing so-called “do-engines” replace dialog systems per se.  The do-engines are more focused on dialog acts, or voice commands, than conventional natural language question answering.

What are the best dialog system APIs for the Internet of Things?

Found so far: