Systems and methods for account synchronization and authentication in multichannel communications

Disclosed embodiments provide a framework to enable automatic identification and authentication of users to allow for multichannel communications in an authenticated state. In response to an authentication request from an end agent engaged in a communications session with a user, a current authentication state associated with the user is determined. Based on the current authentication state and a set of authentication rules associated with the end agent, a set of authentication challenges are identified and executed by an application implemented on the user's computing device. Data corresponding to completion of these authentication challenges is used to determine a new authentication state, which can be used to update the communications session.