Syncthing
Keeps folders identical across your own machines, directly between them, with no cloud account in the middle.
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3 more ways to get Syncthing
Other download sites
Run by third parties, not by The Syncthing Foundation. Prefer the official page above when it works.
Package managers
- Chocolatey
choco install syncthing - Homebrew
brew install syncthing
About Syncthing
Syncthing runs on each machine and syncs the folders you share between them in real time. There is no central server: devices find each other and transfer over TLS, every device identified by its own cryptographic certificate, and only devices you have explicitly allowed can connect.
It is managed through a local web interface, handles file versioning and conflict copies, and works over the local network or the internet. Because nothing is stored on anyone else’s server, there is no storage limit and no subscription.
Strengths
- No central server: none of your data is stored anywhere except on your own computers
- All traffic is TLS encrypted with perfect forward secrecy, and every device is authenticated by certificate
- Real-time continuous sync with file versioning and conflict handling
- Runs on Windows, macOS, Linux and BSD, with tray and installer integrations listed on the download page
Limitations
- The official Android app was archived in December 2024; Android users rely on a community fork
- Both devices must be online at the same time for changes to move
- Setup is per-folder and per-device, which takes more thought than dropping files in one cloud folder
Details
- Pricing
- Free · Free software; the Syncthing Foundation is funded by donations. There is no storage cost because your own machines hold the data.
- License
- MPL-2.0
- Developer
- The Syncthing Foundation
- Platforms
- Windows, macOS, Linux, Command line, Self-hosted
- How it runs
- Downloadable app, Self-hosted
- Account
- Not required
- Works offline
- Yes
- Best suited for
- Keeping the same folder in step on several machines you own
- Categories
- File sync and transfer
- Last verified
- Added
- Provenance
- Selected from the TechWalrus downloads catalog (File Transfer); facts checked against the developer's own pages, 5 sources on file.
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FreeFileSync
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LocalSend
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Kopia
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