Chat app for my forex website?

Hi guys!

I need a chat application for my trading website. It can be a window or a floating chat, but since we are trading together we need some features like sending pictures, videos, charts. It also needs to have video and voice calling, private talking, it needs to work on mobiles and I would also need the ability to manage my own design.
I did quite a lot of research already and found some decent ones like Chatnox and Rumbletalk but I hope that someone is already using something like this and can recommend me something from first hand.

Thanks! :slight_smile:

I am sorry, this is outside our expertise.