BorgBackup

BorgBackup – Deduplicating archiver with compression and authenticated encryption

Attic (backup software) - Wikipedia (forked → Borg)

GitHub - borgbackup/borg: Deduplicating archiver with compression and authenticated encryption.

Quick Start — Borg - Deduplicating Archiver 1.1.13 documentation

BorgBase - Secure hosting for your BorgBackup Repos

GitHub - borgbase/vorta: Desktop Backup Client for Borg