Embodiments of the invention relate to managing a messaging state across multiple clients and devices which use respective communications systems. In one embodiment, a plurality of users are connected to multiple messaging communications systems. The multiple messaging communications systems use a plurality of associated messaging clients on each of the users' respective devices, for messaging communications between the users. The users' messaging communications are stored from the multiple messaging communications systems and their respective messaging clients, using a proxy service. A device, of the plurality of messaging clients, being used by a messaging user of the plurality of users is tracked. A current messaging communication of the messaging user from the stored messaging communications is routed to the currently used device, using the proxy service, for maintaining a state of the messaging communications of the users.