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Resilio Sync vs Unison: catalog facts
Resilio Sync	Unison
Free Free for personal use. Business editions are paid.	Free The open-source application is available without a license fee.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux
Files sync directly between your devices with no cloud storage involved Fast on a local network and works well with very large libraries	Handles updates made independently on both replicas
Closed source, so the protocol and crypto cannot be audited Both devices must be online at the same time to sync	Conflicting edits may require a decision before synchronization.
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
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 September 22, 2026

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