Syncthing
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Syncthing

Private, unlimited file sync directly between your devices

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A continuous file synchronization tool that securely syncs files between your devices using direct device-to-device connections. No cloud servers, no data limits, and no third-party access to your files.

What we love ❤️

  • Completely free and open source with no paid features
  • Direct device-to-device sync without cloud storage
  • Strong encryption for all data transfers
  • Works on Windows, Mac, and Linux
  • No size limits or file type restrictions
  • Detailed version control and conflict resolution

Worth noting 💡

  • Requires installation on all devices you want to sync
  • Initial setup needs basic technical understanding
  • Both devices must be online for sync to occur
  • Uses discovery servers for initial device handshake over internet
  • Can be configured to use custom discovery servers for complete privacy
  • Android users need to use Syncthing-Fork from F-Droid or Play Store
  • No iOS app available due to platform limitations

Syncthing uses peer-to-peer technology to enable direct file synchronization between devices, encrypting all transfers with TLS. Its distributed architecture eliminates the need for central servers, making it particularly useful for users who need to sync large amounts of data securely without cloud storage constraints.