Syncthing — The Complete Guide: Free File Sync Between Computers With No Cloud
Syncthing is an open-source sync tool (MPL-2.0). Each computer connects directly to the others — on the local network or over the internet — and files are not stored with any company. There is no storage limit other than your own disks.
Syncthing
Syncthing Foundation
Sync files directly between computers, with no cloud — identical project folders at the office, at home and on site.
Get it from the vendorWhat you get
- Continuous sync — a changed file reaches the other computers within seconds.
- Encryption — all traffic is encrypted, and devices are identified by key.
- File versioning — keeping files that were deleted or changed.
- Selective folders — each folder is shared only with the devices you choose.
- Untrusted encrypted folder — a device can hold a backup without being able to read it.
What it is not
Syncthing is sync, not backup: an accidental deletion reaches every computer. Turn on file versioning, and keep a separate backup with FreeFileSync.
Related tools
For scheduled backup — FreeFileSync. For drive encryption — VeraCrypt. For shared passwords — KeePassXC.
FreeFileSync
FreeFileSync
Folder sync and backup — compares folders and copies only what changed, for backing up projects to an external drive.
Get it from the vendorVeraCrypt
IDRIX
Encrypt disks, partitions and USB drives — protect drawings and client data if a laptop is lost.
Get it from the vendor
KeePassXC
KeePassXC team
Local encrypted password manager — passwords for portals, software licences and equipment in one file you control.
Get it from the vendor
Joplin
Joplin
Notes and to-do app with encrypted sync — site diaries, checklists and project documentation.
Get it from the vendorThe bottom line
Syncthing gives you the convenience of Dropbox with no subscription and without sending clients’ drawings to someone else’s cloud.