You asked for "best" and since that is a moving target or what's best now is not tomorrow your question is one that can't be answered.
I suggest you go with any solution you can implement and change it later.
Hi.I am using android application on my mobile device and want to integrate a simple chat system for mobile
website is there any live chat tool that support android platform whereby i can easily track website visitors and
location via mobile device?
i found lots of chat tool available in the market which one is best any good experienced?