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Syncthing

Free, open-source peer-to-peer folder sync between your own devices, with no cloud.

Open sourceSelf-hostableCloud storage and file sync services
Visit SyncthingSee 6 alternatives
Verified facts
4 of 4
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About Syncthing

Syncthing keeps folders in sync directly between your computers, phones and servers, without storing anything on a third-party cloud. Devices find each other through discovery servers, then connect directly (or through relays when needed) over encrypted TLS connections, and each device decides which folders it shares with which others. Because there is no central storage, there is nothing to pay and no capacity limit beyond your own disks, but at least one device needs to be online for others to receive changes. It supports file versioning, ignore patterns and untrusted devices that only hold encrypted copies. Syncthing is free, open source under the MPL 2.0 licence and community run. It runs on Windows, macOS, Linux, BSDs and more, and community apps cover Android and iOS. Setup is configuration-heavy compared with Dropbox, and there is no web sharing link for sending files to others.

Best for: Technical users who want private sync between their own machines.

Pros and cons

What works

  • No cloud provider, no storage limits, no fees
  • Encrypted device-to-device connections
  • Runs on almost any OS, including servers and NAS

Why people leave

  • A device must be online for others to sync
  • No public share links
  • Configuration-heavy for non-technical users

Top Syncthing alternatives

See all 6
  1. 1Resilio Sync logo
    Resilio Sync

    Peer-to-peer sync with a friendlier app and mobile support.

    66.5
  2. 2Nextcloud logo
    Nextcloud

    Server-based sync with web access and share links.

    62.6
  3. 3Seafile logo
    Seafile

    Self-hosted server for when you also need web access.

    59.6
  4. 4Dropbox logo
    Dropbox

    Hosted sync with sharing links and no setup.

    57.2
  5. 5rclone logo
    rclone

    Command-line sync to and from many cloud providers.

    55.3

Why people left Syncthing

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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Reviews

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Syncthing: common questions

Is Syncthing free?

Yes. Syncthing is free, open-source software that you can host yourself.

Is Syncthing open source?

Yes. The source code is on GitHub at syncthing/syncthing. You can also run it on your own server.

What platforms does Syncthing run on?

Syncthing is available for Windows, macOS, Linux, Android and Self-hosted.

What are the best alternatives to Syncthing?

The highest-ranked Syncthing alternatives right now are Resilio Sync, Nextcloud and Seafile. See the full ranked list for pricing, platforms and verified facts.

See all 6 Syncthing alternatives