Compare software

DropboxSyncthing
Freemium

A small free tier is available. More storage and features require a paid plan.

 Free

Free software; the Syncthing Foundation is funded by donations. There is no storage cost…

Windows, macOS, Linux, Android, iOS, Web Windows, macOS, Linux, Command line, Self-hosted
  • The most mature and reliable sync engine, with clients everywhere
  • Smart sync keeps large libraries usable on small disks
  • 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
  • The free tier is only a few gigabytes and caps linked devices
  • Files are stored unencrypted from the provider's point of view
  • 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
Downloadable app, Hosted service Downloadable app, Self-hosted
Closed source Open source
License not stated License: MPL-2.0
Account needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 20, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.