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Resilio Sync vs QNAP Qsync: catalog facts
Resilio Sync	QNAP Qsync
Free Free for personal use. Business editions are paid.	Free Provided by QNAP for use with its NAS devices, which must be bought separately.
Windows, macOS, Linux, Android, iOS	Windows, macOS
Files sync directly between your devices with no cloud storage involved Fast on a local network and works well with very large libraries	Real-time sync across computers, mobile devices and the NAS Keeps files on your own hardware instead of a public cloud
Closed source, so the protocol and crypto cannot be audited Both devices must be online at the same time to sync	Requires a QNAP NAS Mac backup is still in beta
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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