At this point, it's probably easier to list off who isn't making a voice-controlled smart speaker (that we know of). Thanks to an FCC filing, it looks like Sonos is getting close to jumping into the fray. "Product model S13 is a high-performance all-in-one wireless smart speaker and part of Sonos' home sound system," the document reads. "S13 adds integrated voice control functionality with far field microphones. Moreover, the device will support multiple voice platforms and music services, allowing customers to effortlessly control their music on Sonos." That lays it out pretty well, no?