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.

There are many alternatives to Unison File Synchronizer for Mac if you are looking for a replacement. The best open source Mac alternative is Syncthing. If that doesn't suit you, our users have ranked more than 50 alternatives to Unison File Synchronizer and 16 are open source and available for Mac so hopefully you can find a suitable replacement. Other interesting open source Mac alternatives to Unison File Synchronizer are FreeFileSync, IPFS, ByteSync and Synkron.
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.

Open-source software for syncing and backing up files across Windows, macOS, and Linux by transferring only essential data.






IPFS is a global, versioned, peer-to-peer filesystem. It combines ideas from Git, BitTorrent, Kademlia, SFS, and the web. It is like a single bittorrent swarm, exchanging git objects. IPFS provides an interface as simple as the HTTP web, but with permanence built in.




IPFS is a completely different system. It does not offer synchronization of two sets of files.


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.

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.




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.




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.




Bacula is a backup program not a bi-directional sync tool.


JFileSync is a Java application used to synchronize directories of two different file systems. For instance, you want to synchronize a set of directories on your laptop with a set of corresponding directories on your workstation. English and German UI.


Server client infrastructure, bidirectional, multiplatform (java based). This discontinued flag is silly. Is "copy" discontinued? Why would it need to evolve if it is working (and it is)


Pulse, officially-sanctioned fork of Syncthing , is a free, secure, and distributed file synchronisation engine.


Open-source, decentralized peer-to-peer service offering file synchronization, ensuring data privacy and encryption and user-autonomy without relying on cloud storage providers.

Unison is birectional and can used a server client infrastructure. Freefilesync is mostly unidirectional and there is no server possibility.