Duplicity
Cloud Backup Solutions
Alternative Vendors
Commercial Alternatives
Key Features
Encrypted Incremental Backups
Uses GnuPG encryption by default with librsync for space-efficient incremental backups that only store changed file parts since the last backup.
Multiple Protocol Support
Supports 20+ protocols including SSH/SCP/SFTP, FTP, rsync, Amazon S3, Google Cloud Storage, WebDAV, Azure, OneDrive, Backblaze B2, and many more cloud services.
Cross-Platform Compatibility
Works best on Unix-like systems (Linux, BSD, macOS) but also supports Windows via Cygwin or Windows Subsystem for Linux.
Command-Line Automation
Powerful command-line interface designed for scripting and automation with support for custom backup scripts and scheduling via cron or systemd timers.
Pros and Cons
Pros
Completely Free and Open Source
No upfront costs or ongoing licensing fees, with full source code availability under GPL license
Strong Security by Default
Encrypts backups by default using GnuPG with digital signing capabilities for integrity verification
Extensive Cloud Support
Supports 20+ storage backends including all major cloud providers and protocols
Space Efficient
Uses librsync algorithm for incremental backups that only transfer changed file portions
Cons
Complex Initial Setup
Requires command-line expertise and manual configuration of GnuPG keys and backup scripts
Fragile Backup Chains
If any incremental backup is missing or corrupted, all subsequent incremental backups become unusable
Limited GUI Options
Primarily command-line tool with limited graphical interface options (Déjà Dup is available but basic)
No Commercial Support
Relies on community support through mailing lists and documentation with no official commercial support available
Feature Comparison
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