Which repository for the messenger is better?

Question

Java

There is a desire to make a repository for my company of about 100 people. The usual messenger is what a million) The usual functionality:

• User profile
  
• User profile data
  
• User avatar
  
• Groups and communities
  
• Community Information
  
• Community logo
  
• group internal chat
  
• The ability to exchange text and media information between application users using a quick communication system
  

Applications for android, can anyone do this, what is the best repository to use for a fork?

Answer 1

I used quickblox.com