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Syncthing

Continuous and secure file synchronization between your computers

Free alternative to Dropbox · Google Drive · OneDrive

Some setupFreeWindows · macOS · Linux★ 90,419 File sharingPrivacy

Syncthing automatically synchronizes files between two or more computers in real time. It focuses heavily on data security and privacy, preventing unauthorized access. It runs directly across your devices without handing your data to third-party cloud providers.

✓ Good for

Anyone wanting private, automatic file sync across their personal computers.

✕ Skip it if

People who prefer simple third-party cloud storage like Google Drive.

How to start

  1. Download and install Syncthing from the official website.
  2. Open the interface to connect your two computers.
  3. Choose which folders you want to sync continuously.

Requires setting up and connecting each device to sync files.

Get it →GitHub repo

Not sure how to install, or if it’s safe? Read the beginner guide

FAQ

Is Syncthing free?

Yes, Syncthing is completely free and licensed under the open-source Mozilla Public License 2.0 (MPL-2.0).

Is Syncthing safe to download?

It is open source (MPL-2.0 license) with 90,419 GitHub stars, last updated 2026-11-10. Download only from the official link on this page, and scan the file before installing: see the safety checklist in our beginner guide.

Does Syncthing upload files to the cloud?

No, it syncs files directly between your own devices in real time without sending your data to any third-party cloud servers.

Compiled from the project README. 90,419 GitHub stars (2026-11-13) · License MPL-2.0 · Last update 2026-11-10