Generally speaking, SimSimi appears to operate similarly to Cleverbot by leveraging collective intelligence – in other words recycling the replies it receives. I noticed recently that the SimSimi Conversation API is available on Mashape: SimSimi Conversation API | Mashape. For more information, check the official developer documentation: SimSimi API. ‘Simsimi Ent‘ seems to be on Quora.
See also my quick and dirty webpages:
· 100 Best SimSimi Videos – Meta-Guide.com
· Chatbots Sentiment Analysis: SimSimi vs. Cleverbot – Meta-Guide.com