Functional requirements:

● Messaging: One user can send a message to another user or a group of users.

● Status: Shows online/offline statuses of users.

● Media upload: Users should be able to upload images and videos in addition to text messages.

● Push notifications: Users should receive a push notification when there are new messages.

● Read receipt: Senders can get a receipt when receivers read messages they sent.

Non Functional requirements:

● Low Latency

● High Availability