In one embodiment, a method includes determining if notifications to be sent to user would benefit from being delivered by haptic stimulation under a current context. This determination may be made by accessing historical notification data of how the user previously responded to notifications in a similar context, and ranking conversion scores for each of one or more haptic-enabled delivery channels, wherein a conversion score indicates a probability of the user interacting with the notification. The most appropriate haptic message-delivery channel is selected based on the scores and historical data, and the notification is sent accordingly.