WhatsApp will communicate with other messaging apps in the future. Initially, support will be provided for messages, video images and files sent from one person to another.
For calls and group chats, however, you will have to wait. The applications that could interface directly with WhatsApp and Messenger could be iMessage, Telegram, Signal and Google Messages. Users will be allowed freedom of choice: whether to accept receiving messages from other apps or refuse. The timing for the launch of this feature has not been disclosed.