rsync, Acronis Cyber Protect Home Office, FreeFileSync, Duplicati, SyncBack, Syncthing, GoodSync, Resilio Sync , Rclone, SyncTrayzor, Unison File Synchronizer, AutoVer, Syncthing-Fork, SSuite File Backup Master, FileFort Backup Software, RecImg, Abakt are some alternatives to Backup4all.