Macrium Reflect, rsync, Time Machine, Acronis Cyber Protect Home Office, Duplicati, SyncBack, GoodSync, Rclone, TimeShift, Spideroak One Backup , BackBlaze, Restic, Yadis! Backup, MultiCloudBackup, Lazy Mirror, snaprd, Xopero Cloud Personal, Blucoubackup, Back it up!, QRecall, RecImg, AISBackup, Attic Backup, Backup Scheduler: Time Editor are some alternatives to Rebel Backup.