rdiff-backup/rdiff-backup

A comfortable and well-configurable graphical Frontend for incremental backups, with a command-line version also available. Modified files are transferred, while unchanged files are linked to the new folder using rsync's hard link feature, saving storage space. Restoring is straightforward via file manager, command line or Back In Time itself.

Fast, secure, efficient backup program

a tool for backing up your data using rsync (if you want to get help, use https://lists.sourceforge.net/lists/listinfo/rsnapshot-discuss)

Very efficient backup system based on the git packfile format, providing fast incremental saves and global deduplication (among and within files, including virtual machine images). Please post problems or patches to the mailing list for discussion (see the end of the README below).

An open source utility that provides fast incremental file transfer. It also has useful features for backup and restore operations among many other use cases.

Cross-platform backup tool for Windows, macOS & Linux with fast, incremental backups, client-side end-to-end encryption, compression and data deduplication. CLI and GUI included.

rustic - fast, encrypted, and deduplicated backups powered by Rust

BackupPC is a high-performance, enterprise-grade system for backing up to a server's disk.

Store securely encrypted backups in the cloud!