rsync is a utility for efficiently transferring and synchronizing files across computer systems, by checking the timestamp and size of files. Developed by Wayne Davison
License: Open Source
SyncToy is a freeware tool in Microsofts PowerToys series that provides an easy-to-use graphical user interface for synchronizing files and folders in Windows versions XP, Vista and 7. It is written using Microsofts .NET framework and uses the Microsoft Sync Framework. Developed by Microsoft
License: Free
SyncToy is a user-friendly synchronization tool primarily for Windows users, offering an easy interface and multiple sync modes, but lacks automation and supports only local and network drives. In contrast, rsync is a powerful, cross-platform tool that excels in handling large data sets and provides extensive configuration options, albeit with a steeper learning curve.