The subject technology accesses, by at least one processor, device capabilities for each of a plurality of recipient devices. The subject technology clusters, by the at least one processor, the plurality of recipient devices into a plurality of groups of recipient devices based on device capabilities. The subject technology determines, for each group of recipient devices, a set of content parameters compatible with the device capabilities of the plurality of recipient devices of a group of client devices. Further, the subject technology generates, for each group of recipient devices, a version of the content according to an associated set of content parameters.