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
Rsync is a versatile, cross-platform tool ideal for incremental backups and file syncing, while Robocopy is a Windows-native application that excels in robust file transfer with error recovery and multithreading. The choice between them largely depends on the operating system and specific use case requirements.