rsync, FreeFileSync, FolderSync, Duplicati, SyncBack, SyncToy, Syncthing, Mountain Duck, Rclone, Allway Sync, Insync, ExpanDrive, ChronoSync, WebDrive, Dropsync, lsyncd, FTP Synchronizer, DirSync Pro, Foldermatch, Autosync, Second Copy, PureSync, Syncplicity, grsync, Qtd Sync, Toucan, FilesAnywhere, Restic, Kopia, FullSync, MacDropAny, FBackup, Bvckup 2, Back4Sure, BFileSync, KLS Backup, SyncBreeze, DSynchronize, Synkron, Mail Backup X, Drive File Stream by Google, SmartSync Pro, SyncMate, CloudSync, RsyncOSX, Directory Compare, Create Synchronicity, Backup4all, Path Too Long PRO, Cloudevo, Rmanager Pro, Sync Folders Pro, SyncFolders, Uranium Backup, Synchredible, cwrsync, ozSync, SOS Online Backup, jaBuT, Alternate File Move, HQ.app, MiMedia, @MAX SyncUp, BestSync, Storegate, Bonkey, rsync backup for Android, Rebel Backup, OneWaySynchronize, Acebackup, Yummy FTP Watcher, Nomadesk, MKSBackup, CopyInOrder, SSuite Kronoz Sync-Master, Backuplist, TrayBackup, Kup Backup System, AnyBackup, DiffVue, Humyo, DotSpirit Backup, 7zbackup, iGoUSB, AISBackup, SynchroHajzel, AllSync by Michael Thummerer Software Design, Digionica SyncTool, SmartBackup, WinDataReflector, Syncless, Wixi, Banckle File Sharing, BatchSync Secure are some alternatives to GoodSync.