Abstract: Various systems and methods for managing multichannel content delivery are presented. A multichannel content server system may use an application programming interface (API) for interfacing with a plurality of end-user communication channels. An end-user interaction database may store interaction data for a plurality of end-users. An end-user-specific preference profile may be created based on a first end-user interaction received via a first end-user communication channel stored to the end-user interaction database for a particular end user. A request may be received originating from an end-user computing device of the end-user via a second end-user communication channel. A client-specific engagement profile may be loaded and evaluated based on the created end-user-specific preference profile. Based on the client-specific engagement profile evaluated based on the end-user-specific preference profile, content may be selected then transmission to an end-user system.