Does it work well for you? Always had issues with it esp on iOS when it came to video chats

Syncthing is e2e encrypted and goes through relay servers, but it's really good and handles lots of files gracefully

I use it for this as well, but as it's not open source I sometimes get paranoid it's being mirrored on a chinese server somewhere. Maybe someone more technical than I can reassure me this is impossible... also, if you don't use it for a couple of weeks, it sometimes stops working altogether until yo...