Open Source FreeFileSync Alternatives for Windows

There are many alternatives to FreeFileSync for Windows if you are looking for a replacement. The best open source Windows alternative is Syncthing. If that doesn't suit you, our users have ranked more than 100 alternatives to FreeFileSync and many of them are open source and available for Windows so hopefully you can find a suitable replacement. Other interesting open source Windows alternatives to FreeFileSync are Rclone, Restic, Unison File Synchronizer and Kopia.

filter to find the best alternatives

FreeFileSync alternatives are mainly File Sync Tools, but if you're looking for Backup Clients or Online Backup Tools you can filter on that. Other popular filters include Windows + Free, Android, Open Source, Windows, Windows + Open Source and Linux. These are just examples - use the filter bar below to find more specific alternatives to FreeFileSync.
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Alternatives list

  1. Syncthing icon
     899 likes

    Open-source, peer-to-peer service offering encrypted file synchronization, ensuring data privacy and user-autonomy without relying on cloud storage or central servers, suitable for various uses.

    149 Syncthing alternatives

    Cost / License

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Self-Hosted
    • Terminal
    • Cloudron
    • Termux
     
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    5
  2. Rclone icon
     188 likes

    Versatile command-line utility for syncing, copying, and verifying files across local disks and multiple cloud storage providers. Features include hash-based integrity checks, timestamp preservation, compression, encryption, and mounting storage as drives for backup and transfer tasks.

    99 Rclone alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Oracle Solaris
    • FreeBSD
    • NetBSD
    • OpenBSD
     
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    3
  3. Restic icon
     69 likes

    restic is a program that does backups right. The design goals are: Easy, Fast, Verifiable, Secure, Efficient, Free.

    66 Restic alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Arch Linux
    • FreeBSD
    • OpenBSD
     
  4. Unison is a file-synchronization tool for POSIX-compliant systems (e.g. *BSD and GNU/Linux), macOS and Windows, with the caveat that the platform must be supported by OCaml. It allows two replicas of a collection of files and directories to be stored on different hosts (or diffe.

    54 Unison File Synchronizer alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • Flatpak
    • Snapcraft
     
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    2
  5. Kopia icon
     40 likes

    Kopia is a fast and secure open-source backup/restore tool that manages filesystem snapshots in a remote storage. It features client-side encryption, compression, backup policies. command-line interface and more.

    20 Kopia alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
     
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    1
  6. Toucan icon
     38 likes

    Toucan is a small portableapp utility allowing you to synchronise, backup and secure your data with more options than the built in suite utilities. It is split up into 7 tabs, allowing you to easily find the function that you want.

    Cost / License

    Application types

    Alerts

    • Discontinued

    Platforms

    • Windows
    • PortableApps.com
     
  7. Bacula icon
     30 likes

    Bacula is a set of computer programs that permit managing backup, recovery, and verification of computer data across a network of computers of different kinds.

    78 Bacula alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • FreeBSD
    • OpenBSD
    • BSD
     
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    1
  8. DirSync Pro icon
     37 likes

    DirSync Pro is a small, but powerful utility for file and folder synchronization. Java JRE 1.7 or above is needed to run DirSync Pro.

    89 DirSync Pro alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
     
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    1
  9. Synkron icon
     75 likes

    Synkron is an application for folder synchronisation and folder-backups that allows you to configure your synchronisations in detail. Despite having many features, the user interface of Synkron is very user-friendly and easy to use.

    67 Synkron alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • PortableApps.com
     
  10. Rclone GUI icon
     4 likes

    A GUI for Rclone, with additional features including batch file generation, auto cloud setup, and saved file/folder paths.

    Cost / License

    Application types

    Platforms

    • Windows
    • Linux
     
  11. ByteSync icon
     5 likes

    Free and open-source differential file synchronization software for Windows, macOS, and Linux. ByteSync securely compares and transfers only file differences — no VPN, no setup, just fast, encrypted, cross-platform sync and backup.

    Cost / License

    • Free
    • Open Source (MIT)

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
     
  12. Qtd Sync icon
     20 likes

    A graphical interface for the Rsync engine that will synchronise files between two computers either locally or over the internet. The beauty of Rsync is that it only transfers the exact part of a file that has changed (differential synchronisation), saving bandwidth and time.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Windows
    • Linux
     
12 of 29 FreeFileSync alternatives