Syncthing
Verified working Aug 7, 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.
Alternative listings
Private cloud storage with encrypted sync, notes, and sharing.
Privacy & security tools / big-tech alternativesFilen is a zero-knowledge cloud storage service built around client-side encryption for files, backups, sharing, and collaboration. It offers web, desktop, mobile, and CLI access, with features such as network drive mounting, smart sync, encrypted notes, and encrypted chats. Accounts start with a free storage tier, with paid plans for more capacity.
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Privacy & security tools / big-tech alternativesInternxt offers encrypted cloud storage built around zero-knowledge, end-to-end protection, so files are encrypted before they reach its servers. The company also presents a broader privacy suite that includes Drive, VPN, Mail, Meet, Antivirus, and Cleaner, with free storage plus paid annual, lifetime, and business plans.
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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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