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Unison vs Lsyncd: catalog facts
Unison	Lsyncd
Free The open-source application is available without a license fee.	Free Free and open source.
Windows, macOS, Linux	Linux, Command line
Handles updates made independently on both replicas	Near real-time mirroring triggered by filesystem events Uses standard rsync and SSH for transfers
Conflicting edits may require a decision before synchronization.	One-way mirroring rather than two-way sync Command-line and config-file only, no GUI
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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