Windows Backup and Restore is described as '(formerly Windows Backup and Restore Center) is a component of Microsoft Windows introduced in Windows Vista and included in later versions that allow users to create backups and restore from backups created earlier' and is an app in the backup & sync category. There are more than 25 alternatives to Windows Backup and Restore for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best Windows Backup and Restore alternative is rsync, which is both free and Open Source. Other great apps like Windows Backup and Restore are GoodSync, Time Machine, CrashPlan and Déjà Dup.
rsync can be used for backup, but it isn't a backup tool in its own right.