Syncthing
Sync files directly between your devices.
New to this? What open source means and how to read this page.
What it is
A continuous file synchronisation program that syncs folders between your own devices, with no central server.
Good for
Keeping folders in sync across your computers and phones privately.
The catch
There is no cloud copy, so at least one device must be on for syncing to happen. It also is not a backup. Deleting a file deletes it everywhere.
Facts checked on 12 October 2026. We have not yet run a hands-on test of this tool. When we do, it gets a "Tested" mark here. Approximate US list prices for an individual plan, from third-party price trackers checked on 12 Oct 2026. Monthly billing where it exists. Regions, taxes and promotions change them. Confirm at the vendor before you decide.
More in Self-hosted
Your own photo library, on your own server.
Replaces: Google Photos
Know when your website or service goes down.
Replaces: UptimeRobot
Scan, tag and search all your paperwork.
Replaces: ABBYY FineReader