GoodSync is described as 'Professional software for file backup and synchronization. It automatically syncs files across various platforms such as computers, mobile devices, or drives, with or without cloud-based services' and is a very popular File Sync tool in the backup & sync category. There are more than 100 alternatives to GoodSync for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best GoodSync alternative is Syncthing, which is both free and Open Source. Other great apps like GoodSync are FreeFileSync, Rclone, Duplicati and rsync.
With ChronoSync, you can backup, sync, create bootables, or clone your Mac files. Now offers ability to sync to select cloud services. Best thing is that there are no update fees. Pay only once! It's updated quite often, too.