bcpierce00/unison

Health v2 · maintenance only

Adoption not part of the score

5455 stars · 273 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Unison is a cross-platform, bidirectional file synchronization tool that keeps two replicas of files and directories in sync across different hosts or disks. It propagates non-conflicting changes automatically, detects conflicts, and communicates over ssh or TCP with rsync-like efficient transfers.

Use cases

• sync files between a Windows laptop and a Unix server
• two-way synchronization of directories on different machines
• keep an offline local copy of files that syncs when reconnected
• efficiently sync large files over slow network links
• automatically sync changes as they happen with repeat mode
• synchronize data over ssh without root privileges

When to choose

• you need true two-way sync, not one-way mirroring or backup
• you work offline and need synchronized data available locally
• you cannot install kernel modules, FUSE, or use root privileges
• you want bandwidth-efficient syncing of large files over ssh
• you need a battle-tested tool with a precise specification

When to avoid

• you only need one-way mirroring or simple backups (rsync is simpler)
• you want real-time collaborative editing of the same files
• you need a distributed filesystem with concurrent multi-client access
• you expect rapid feature development or large active support community

Facets

application · maturity maintenance

file-system backup cli gui files developer-tools cross-platform self-hosted windows cross-platform cli file-synchronization two-way-sync rsync-alternative ssh offline-sync linux macos

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markdown · JSON · MCP: product_card(name="bcpierce00/unison")