I started with Chatbase, which had proper responses, then I moved to Orimon which had more features and higher limits; however, responses were not as precise (which I consider is the most important feature)and at the end I decided to refund. Kept Chatbase.
Links in responses are better in Orimon, though. I miss that.
For Orimon be sure to use an email there’s no possibility you can loose access, because you cannot change it even through contacting support. This was the trigger for my refunding at the very end.