For business live chat, Use Live2Support. Its a fast, secure and easy live chat software for your website. Now support your customers online.
ebuddy is the best messenger for live chat. you can use this on computer or on your mobiles. It has the functionality to access all the accounts at the same time.
We recommend web based solutions as desktop based solutions like Skype or Yahoo are not always available on all client computers. They would have to install which often is additional hassle or impossible in certain offices and organizations where security restrictions don't allow setting this up. There are many web based live support text chat solutions and we also provide and are improving solutions that include webcam and microphone support for easier communication.