Recently I started searching for a solution for providing live chat to WordPress users. As I already mentioned previously, I am currently working at ManageWP as a Head of Customer Happiness and we decided to implement a live chat solution to our users in order to provide a much better Customer Support.
I did a little digging and there are a lot of good services out there but one plugin was just awesome and it proved to be the best solution. The plugin name is Zopim Live Chat and I highly suggest checking it if you are in need of a live chat plugin. Zopim is a freemium solution and their official website is located at https://www.zopim.com/.
Zopim is currently in a last phase of my testing after which I will start using it. Thumbs up for the good folks from Zopim!