Teleparty, Hyperbeam, Invited.tv, Watch2Gether, Kosmi, Metastream, Watch Party, Synaptop, Antler Club, Getaroom.video, OpenTogetherTube, Juicebox.dj, Bearcat, Syncplay, Stream Together, SyncLounge, SyncWatch.Video, TurtleTV, SyncPlayer, WatchPubs, Torrent Party, DJ Clique are some alternatives to Kast.