Is there any startup with a functional chat bot that can be plugged into a website as a plugin like Olark, and we can feed information about our products?
Without more detail it is hard to make a good recommendation. Since I don’t know your exact needs I will share the best AI based chat tool I have seen. It is offered by a company called NextIT. You can see it in use at goarmy.com. If navigate there and chat with Sgt. Star you can ask him just about anything you can think of and you will get a good and accurate response.