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Utilities & Security
One file explorer for every drive and cloud
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Unison
File synchronisation tool for macOS, Unix and Windows
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About Unison
Unison is a file-synchronisation tool that keeps two replicas of a collection of files and directories up to date across different hosts or disks. Unlike one-way mirroring tools, it propagates changes made in either replica, detects conflicting updates and works across platforms over direct sockets or SSH. Free under the GNU Public License, it suits users who need resilient, bandwidth-efficient sync without modifying the kernel.
Unison website preview
Live preview of cis.upenn.edu via the WordPress mShots service — it can take a few seconds to generate on a first visit.
Unison: strengths & things to check
Strengths
- Completely free to use — this directory lists no paid plan for it.
- Covers file sync, backup, cross platform, ssh — see the focus areas listed in its key facts.
- Has 6 close alternatives in the same category on this page, so switching or comparing is easy.
Things to check
- Free tools can change their model or shut down — avoid locking critical work into it without an export path.
- Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
- It is one of 879 tools in the Utilities & Security category here — compare it against the alternatives below before you commit.
Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.
Unison pricing
| Pricing model | Free — listed in this directory as a free tool, with no paid plan required to use it. |
|---|---|
| Free access | Yes — fully free |
| Current plan prices | Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale. |
| Official site | cis.upenn.edu |
Unison key facts
- Category: Utilities & Security
- Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
- Focus areas: file sync, backup, cross platform, ssh
- Official site: cis.upenn.edu
Unison FAQ
How much does Unison cost?
Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (cis.upenn.edu).
What is Unison used for?
File synchronisation tool for macOS, Unix and Windows Its focus areas in the Utilities & Security category: file sync, backup, cross platform, ssh.
Where can I try Unison?
On its official site, cis.upenn.edu — the Visit Official Site button above goes straight there.
Unison vs alternatives
| Unison | Spacedrive | SyncBack | Acronis | |
|---|---|---|---|---|
| Pricing | Free — listed in this directory as a free tool, with no paid plan required to use it. | Free — listed in this directory as a free tool, with no paid plan required to use it. | Freemium — a free tier lets you start, and paid plans are available if you need more. | Paid — this directory does not list a free tier for it. |
| Focus areas | file sync, backup, cross platform, ssh | file manager, file sync, cross platform, open source | backup, file sync, windows, scheduling | utilities, security, backup, compliance |
| Official site | cis.upenn.edu | spacedrive.com | 2brightsparks.com | acronis.com |
| Directory status | Listed | Listed | Listed | Listed |
Side-by-side from each listing's own directory data. Full alternative cards are below.
About the Utilities & Security category
Password managers, cloud storage, and VPNs for everyday digital security. The Utilities & Security category on Tools Hub currently lists 879 tools. Alongside Unison, it includes Pterodactyl, Manyfold, Kitmul, RomM.
Alternatives to Unison
Tools in the same Utilities & Security category that share focus areas with Unison — worth comparing before you commit:
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More in Utilities & Security
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