Even if it's not open source, that's not necessarily a bad thing. BitTorrent Sync seems to have set a bar and prompted development of open source equivalents[1]

Even if it's not open source, that's not necessarily a bad thing. BitTorrent Sync seems to have set a bar and prompted development of open source equivalents[1]. If this gives open source secure messaging software a bit of competition, I'm happy that it exists. 1. Not that there wasn't open source sync software before, but a lot of it didn't have a gui, or was based on git, or something like that.