Syncthing
Verified working Sep 21, 2026
Peer-to-peer file syncing that keeps your data off central servers.
Syncthing is an open-source file synchronization tool for keeping folders updated across two or more computers. It syncs directly between approved devices, secures connections with TLS, and avoids storing your files on a provider-run server.
Why it stands out
- No central storage server is required, reducing exposure to provider-side breaches or account lock-in.
- Each device must be explicitly approved before it can connect, rather than relying only on a shared login.
- The protocol, code, bug tracker, and development discussions are public, making the project unusually auditable.
- Works across many desktop and server operating systems, including less common Unix-like platforms.
- Can sync over both local networks and the internet without requiring users to manage IP addresses manually in typical setups.
Good to know
- Requires Syncthing to be installed and running on the computers that participate in syncing.
- It is not a hosted cloud drive; Syncthing itself does not keep an always-available copy of your files on a provider server.
- Initial sharing is more hands-on than account-based cloud storage because devices and folders must be approved explicitly.
Photos

Privacy-conscious individuals and small teams can sync files across their own machines without handing storage to a cloud provider. Keep desktop, laptop, and home server folders continuously aligned. Share a project folder with a trusted collaborator by approving their device ID. Use a personal server as a self-managed backup target for workstation files.
Real-time multi-folder synchronization; device identity based on cryptographic certificates; TLS-secured communication; documented open protocol; open-source code and public issue tracking; browser-based configuration and monitoring interface; support for macOS, Windows, Linux, FreeBSD, Solaris, OpenBSD, and other systems.
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Similar sites elsewhere
- Nextcloud — nextcloud.com
- Seafile — seafile.com
- Resilio Sync — resilio.com/sync
- ownCloud — owncloud.com
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