MyChat

MyChat is a client/server chat program that is perfect for sending messages and exchanging files within an office or company. It can work within a company network or over the Internet.

MyChat will be useful for enterprises that need a way to facilitate internal communication when public IM systems such as WhatsApp, Viber, or Skype are not permitted due to limited Internet access or company security requirements intended to prevent information loss.

You won’t have any problems like that with MyChat. You set up the server yourself, and you can control absolutely everything.