Minarca is described as 'Self-hosted opensource software to backup all your data on Linux, Windows and Mac' and is an app in the backup & sync category. There are more than 10 alternatives to Minarca for a variety of platforms, including Linux, Mac, Windows, BSD and Web-based apps. The best Minarca alternative is Duplicati, which is both free and Open Source. Other great apps like Minarca are rsync, Kopia, BorgBackup and CrashPlan.
rdiff-backup backs up one directory to another, possibly over a network. The target directory ends up a copy of the source directory, but extra reverse diffs are stored in a special subdirectory of that target directory, so you can still recover files lost some time ago.
