Alternatives to Duplicacy

A deduplicating cloud backup tool whose lock-free design lets several machines share one storage bucket. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Duplicacy.

  • restic

    A single-executable backup program that makes encrypted, deduplicated snapshots and can send them almost anywhere.

    FreeOpen sourceWindowsmacOSLinuxCommand line

    restic is open source under BSD-2-Clause with encrypted deduplicated snapshots to many backends, but it is command line only and lacks Duplicacy's lock-free sharing design.

  • Kopia

    An encrypted snapshot backup tool with both a command line and a proper desktop app, pointed at whatever storage you choose.

    FreeOpen sourceWindowsmacOSLinuxCommand line

    Kopia is free and open source under Apache-2.0, including its desktop app, and offers encryption, compression and deduplication, though it is still pre-1.0.

  • Duplicati

    A backup client with a web interface that encrypts your files and pushes them to more than twenty cloud services.

    FreeOpen sourceWindowsmacOSLinux

    Duplicati gives a free MIT-licensed web interface and scheduler with encryption to many cloud services, but restores of very large backup sets can be slow.

  • BorgBackup

    A deduplicating archiver for Linux, macOS and BSD that makes daily backups cost almost nothing beyond the day’s changes.

    FreeOpen sourceLinuxmacOSCommand line

    BorgBackup is open source with strong deduplication and encryption over SSH, but it has no native Windows build and is command line only.

  • Arq

    Encrypted backup software for Mac and Windows that stores backups in your own cloud account or disk.

    PaidProprietaryWindowsmacOS

    Arq is paid, closed-source software for Mac and Windows with end-to-end encryption to your own cloud, and it drops Linux support.

  • rustic

    Create encrypted, deduplicated backups in restic-compatible repositories.

    FreeOpen sourceWindowsmacOSLinux

    rustic writes encrypted deduplicated backups in restic-compatible repositories under an open-source license, though it is younger and compatibility should be checked.

  • MSP360 Backup Free

    Free backup software for personal computers that sends files to local drives, network shares or cloud storage.

    FreemiumProprietaryWindowsmacOSLinux

    MSP360 Backup Free sends backups to S3-compatible clouds, local disks and shares on all three desktop platforms, but it is limited to personal use.

  • Duplicity

    Encrypted, bandwidth-efficient incremental backup to remote storage.

    FreeOpen sourcemacOSLinuxCommand line

    Duplicity is GPL-2.0 command-line encrypted incremental backup to many back ends, needing periodic full backups instead of chunk deduplication.

Also worth comparing

These listings name Duplicacy as their own alternative, so the relationship runs both ways.

  • bup

    Command-line backup system built on the git packfile format with deduplication and fast incremental saves.

    FreeOpen sourcemacOSLinuxCommand line

    Duplicacy lets several machines share one deduplicated cloud bucket with client-side encryption, but its licence is not open source and the web interface is paid.

  • Plakar

    An open-source encrypted, deduplicating backup tool with snapshots and a web interface for browsing restores.

    FreeOpen sourceLinuxSelf-hostedCommand line

    Duplicacy lets several machines share one deduplicated storage bucket without a server, but its license is not open source and its web interface is paid.

  • Tarsnap

    A command-line online backup service for Unix-like systems with client-side encryption and block-level deduplication.

    PaidProprietarymacOSLinuxCommand line

    Duplicacy runs on Windows, macOS and Linux and backs up to many cloud providers with client-side encryption, but its license is not open source and commercial use is paid.

Similar software

Related functionality, not a direct replacement.