I use borg with rsync.net (and another host as a backup-backup). Works on linux. Backs up what I tell it to, I can mount any historical backup as a filesystem a

I use borg with rsync.net (and another host as a backup-backup). Works on linux. Backs up what I tell it to, I can mount any historical backup as a filesystem and copy stuff over. Uses encryption, is open source. You can point it to multiple backup locations for local and remote backups. Works for me. Takes about three minutes to do an incremental backup to two locations every evening.