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Syncthing vs FolderSync: catalog facts
Syncthing	FolderSync
Free Free software; the Syncthing Foundation is funded by donations. There is no storage cost…	Freemium The Android app is free; the desktop app has a 14-day trial.
Windows, macOS, Linux, Command line, Self-hosted	Windows, macOS, Linux, Android
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	Supports more than 20 cloud providers Also syncs with SMB and SFTP targets
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	Desktop version is paid after a 14-day trial Proprietary software
Downloadable app, Self-hosted	Downloadable app
Open source	Closed source
License: MPL-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 23, 2026

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