Duply is described as 'Frontend for the mighty duplicity magic. duplicity is a python based shell application that makes encrypted incremental backups to remote storages. Different backends like ftp, sftp, imap, s3 and others are supported' and is an app in the backup & sync category. There are seven alternatives to Duply for a variety of platforms, including Mac, Linux, Windows, BSD and Google Drive apps. The best Duply alternative is Duplicati, which is both free and Open Source. Other great apps like Duply are rsync, Backer, Duplicity and RsyncOSX.