Attic Backup is described as 'Attic is a deduplicating backup program written in Python. The main goal of Attic is to provide an efficient and secure way to backup data. Only the changes are stored' and is an app in the Backup & Sync category. There are more than 10 alternatives to Attic Backup for a variety of platforms, including Linux, Mac, Windows, BSD and Arch Linux. The best alternative is Duplicati, which is both free and Open Source. Other great apps like Attic Backup are Spideroak One Backup (Paid), Borg Backup (Free, Open Source), BURP (Free, Open Source) and bup (Free, Open Source).
Duplicati is a backup client that securely stores encrypted, incremental, compressed backups on local storage, cloud storage services and remote file servers. The Duplicati project was inspired by Duplicity and had similar functionality until 2008.
SpiderOak provides an easy, secure and consolidated online backup, storage, access, sharing & sync tool for Windows, macOS, and Linux (Ubuntu, Debian & Fedora). SpiderOak offers a different approach to online backup, synchronization, and sharing.
Burp is a network backup and restore program. It uses librsync in order to save network traffic and to save on the amount of space that is used by each backup. It also uses VSS (Volume Shadow Copy Service) to make snapshots when backing up Windows computers.
ZBackup is a globally-deduplicating backup tool, based on the ideas found in rsync. Feed a large .tar into it, and it will store duplicate regions of it only once, then compress and optionally encrypt the result.
Rebel Backup lets you make encrypted backups of your important files offsite to Dropbox or Google Drive. You control what and how often is backed up, and the encryption happens locally on your computer.
Stellar Insta Backup is a Windows data backup software to create full volume backup or backup of selected files and folders. The tool facilitates different types of data backups; such as full backup, differential backup, and incremental backup.