best live tchat for connected users

  livechat, php

I have a private company site with login and password for company members.

I would like to provide a live chat so that connected employees can discuss with each other.
All the live chat that I find seems to be used to capture future customers who visit a site.

I found cometchat , but I wanted to know if there were any competitors, allowing members to discuss among themselves ?


Source: Ask PHP