Presenting notifications to one or more computing devices of a user is provided. A notification is received addressed to a client service running on a computing device of one or more computing devices of the user. The notification is classified based on content associated with the notification. User context of the user is determined based on user-related information received from the one or more computing devices. The notification is presented to one or more of the one or more computing devices of the user according to one or more modes of presentation, based on classifying the notification and determining the user context.