In one embodiment, a computing system may receive, from a number of artificial reality devices each corresponding to a respective user, data generated by different artificial reality applications executing on the number of artificial reality devices. The data includes contextual information associated with experiences of the number of users in different artificial reality environments generated by the different artificial reality applications. The computing system may identify a target user of a number of users, and then select a portion of the received data based on information associated with the target user. The selected portion of the received data is associated with one of the different artificial reality applications. The computing system may then generate output data for the target user based on the selected portion of the received data, and further provide the output data to an artificial reality device corresponding to the target user.