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Syncthing vs SyncThingy: catalog facts
Syncthing	SyncThingy
Free Free software; the Syncthing Foundation is funded by donations. There is no storage cost…	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux, Command line, Self-hosted	Linux
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	Syncthing and tray icon in one Flathub install Deliberately minimal, with little to configure
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	Linux only Few features beyond starting Syncthing and showing its status
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License: MPL-2.0	License: GPL-3.0
No account needed	No account 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 October 1, 2026

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