A user is a unique participant address, chat identity, phone number, or WhatsApp number. Each user is counted once a month. If the same user appears in more than one channel, they will only be counted once.
An active user is counted when a user logs in to a front-end SDK, is assigned to or contributes to a conversation, or when edits are made to their user record. This includes new messages or message edits from our APIs, or sending and receiving SMS and WhatsApp messages.