Webrtc application to integrate with our CRM application

We need an application for collaboration/ conference/messaging and meeting with the following features.
• Users should be able to share text, attachments and audio/ video messages.
(A)Appointment/conference link should be active based on HOST-USER input .
(B)User should be able to share conference link with their family and friends.
(C)Invited users should be able to request the HOST-USER for joining the consultation session."
• Only registered users should be able to join live/streaming lecture.
• Sharing of Conference link via WhatsApp, FB, Gmail should be possible
• Whiteboard, Cobrowsing, Screen Sharing options in conference
• Only a HOST-USER should be able to initiate audio or video calls.
• We should be able to store all the chat history
• We need this solution to be centred around webrtc only.
• All APIs should be platform independent ie., we should be able to integrate with web, android and ios apps