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

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