Restic is a cross-platform, free and open source program written in Go. We can use it to create compressed, encrypted and space efficient backups, since it is smart enough to archive only changed fragments of files. Restic can use many storage services as targets, such as Google Drive or AWS (Amazon Web Services) S3 buckets, but works also locally and over plain SFTP connections.
borg
How to orchestrate Borg backups with Borgmatic
Borgmatic is a free and open source configuration-driven wrapper around Borg, the secure and space-efficient archiver. Borgmatic allows us to orchestrate Borg backups by setting redundancy, rotations, hooks and many other things in a central place: an human-friendly and very well commented configuration file.
Introduction to Borg Backup
Borg is a very useful application we can use to create deduplicating backups on Linux. Free and open source software, it is, for the most part, written in Python and supports data compression and encryption. Thanks to the data de-duplication feature, only data which actually changes is archived, and this let us optimize both disk space and execution time. Borg is really easy to install, since it is packaged and included in the repositories of the most used Linux distributions.