you can use Skype and Brosix for the profession and business uses. and Whats App is most popular for the Entertainment Only.

I have used many live chat apps for my website, most of them were good but I found tiger.do very very snappy and userfriendly
The major advantage of tiger.do*is that it Combines functionalities usually found across multiple solutions. So your database, analytics and live chat are all in one place.It is very snappy and userfriendly. Do give it a try.

watss app is the best application to chat with others

whats app and facebook are best chat application

I like whatsapp and hike........

Skype and WhatsApp is best mobile chat application

Best Chat Application?
 

Whatsapp, Facebook Messenger, Google Hangouts, Hike and Skype are best chat application.

Facebook, Whatsapp and Skype are best chat application