Duplicati is a backup tool, not a file sync tool.

Areca Backup is a personal file backup software developed in Java. It is released under the GNU General Public License (GPL) 2.

Rsnapshot is a filesystem snapshot utility based on rsync.

Déjà Dup is a simple backup tool. It hides the complexity of backing up the Right Way (encrypted, off-site, and regular) and uses duplicity as the backend. Fe…

DirSync Pro is an open source synchronization and backup utility for Windows, Linux, macOS, and all other operating systems that run Java.