# Unison

- **Canonical URI:** https://www.vioscale.ai/software/unison
- **Category:** File Sync
- **Homepage:** https://github.com/bcpierce00/unison
- **Also known as:** unison
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-26T19:21:12.436Z

## Vioscale score

**56.3 / 100**, confidence 26% (low). Computed 2026-09-01.

Composite of weighted, independently-sourced signals (no user reviews, no vendor payment).

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| price_level | 100 | 0.052 | 5.2 | ✓ |
| reliability | 0 | 0.073 | 0 | - |
| capabilities | 67.1 | 0.084 | 5.6 | ✓ |
| repo_stars | 70.5 | 0.026 | 1.8 | ✓ |
| integrations | 0 | 0.09355555555555557 | 0 | - |
| dependent_projects | 0 | 0.063 | 0 | - |
| dev_activity | 19 | 0.094 | 1.8 | ✓ |
| release_cadence | 26.7 | 0.052 | 1.4 | ✓ |
| security_posture | 0 | 0.073 | 0 | - |
| package_downloads | 0 | 0.136 | 0 | - |
| security_score | 45 | 0.042 | 1.9 | ✓ |
| pricing_transparency | 80 | 0.084 | 6.7 | ✓ |
| community_qa_activity | 0 | 0.063 | 0 | - |

## Pricing

_As of 2026-08-21, [verify at source](https://github.com/pricing). Independently observed._

Free · Free tier

> Free and open source

## About

Unison is an open-source utility that maintains two replicas of files and directories across separate hosts or storage devices, automatically propagating non-conflicting changes while detecting conflicting updates. It works over internet connections including slow links, and allows offline access to already-synchronized data.

_Independently observed._

## Platform & deployment

- **Platforms:** CLI, macOS, Linux, Windows
- **Deployment:** Self-hosted

## Capabilities

_The capabilities that matter for File Sync. "-" = undocumented, not absent._

| Capability | Supported |
|---|:--:|
| **Capabilities** | |
| Deployment model | Self hosted |
| Peer to peer p2p network routing | ✓ |
| Client server architecture cloud host | ✗ |
| Block level delta sync transfer speed | ✓ |
| Self hosted linux docker deployment | ✓ |
| Synology qnap nas hardware integration | - |
| Aws s3 azure blob external mounts | - |
| Active directory ldap identity sync | - |
| Version history and conflict resolution | ✓ |
| End to end encryption keys in transit | - |
| SOC2 type ii | - |
| ISO 27001 | - |
| Pricing model | Free open source |

## Release history

| Version | Date | Type |
|---|---|---|
| [v2.54.0](https://github.com/bcpierce00/unison/releases/tag/v2.54.0) | 2026-05-01 | stable |
| [v2.53.8](https://github.com/bcpierce00/unison/releases/tag/v2.53.8) | 2025-11-05 | stable |
| [v2.53.7](https://github.com/bcpierce00/unison/releases/tag/v2.53.7) | 2024-11-05 | stable |
| [v2.53.6](https://github.com/bcpierce00/unison/releases/tag/v2.53.6) | 2024-11-05 | stable |
| [v2.53.5](https://github.com/bcpierce00/unison/releases/tag/v2.53.5) | 2024-05-07 | stable |
| [v2.53.4](https://github.com/bcpierce00/unison/releases/tag/v2.53.4) | 2024-02-19 | stable |
| [v2.53.3](https://github.com/bcpierce00/unison/releases/tag/v2.53.3) | 2023-04-28 | stable |
| [v2.53.2](https://github.com/bcpierce00/unison/releases/tag/v2.53.2) | 2023-03-20 | stable |
| [v2.53.1](https://github.com/bcpierce00/unison/releases/tag/v2.53.1) | 2023-03-19 | stable |
| [v2.53.0](https://github.com/bcpierce00/unison/releases/tag/v2.53.0) | 2022-11-07 | stable |
| [v2.52.1](https://github.com/bcpierce00/unison/releases/tag/v2.52.1) | 2022-05-08 | stable |
| [v2.52.0](https://github.com/bcpierce00/unison/releases/tag/v2.52.0) | 2022-03-12 | stable |
| [v2.51.5](https://github.com/bcpierce00/unison/releases/tag/v2.51.5) | 2021-12-18 | stable |
| [v2.51.4](https://github.com/bcpierce00/unison/releases/tag/v2.51.4) | 2021-06-24 | stable |
| [v2.51.3](https://github.com/bcpierce00/unison/releases/tag/v2.51.3) | 2020-10-21 | stable |

_… and 5 earlier release(s)._

## Facts

Every value below carries its source and our confidence. Facts are re-crawled on a freshness schedule.

### activity

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| activity.commits_last_30d | 3 | [link](https://github.com/bcpierce00/unison/pulse) | 2026-08-26 | 65% (medium) |

### adoption

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| adoption.github_stars | 5,455 | [link](https://github.com/bcpierce00/unison) | 2026-08-26 | 90% (high) |

### language

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| language.primary | OCaml | [link](https://github.com/bcpierce00/unison) | 2026-08-26 | 90% (high) |

### license

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| license.spdx | GPL-3.0 | [link](https://github.com/bcpierce00/unison) | 2026-08-26 | 95% (high) |

### release

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| release.cadence_days | 132 | [link](https://github.com/bcpierce00/unison/releases) | 2026-08-26 | 70% (medium) |

### market

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | [link](https://github.com/pricing) | 2026-08-21 | 75% (high) |

### pricing

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| pricing.free_tier | yes | [link](https://github.com/pricing) | 2026-08-21 | 60% (medium) |
| pricing.model | commercial | [link](https://github.com/bcpierce00/unison) | 2026-08-26 | 40% (low) |
| pricing.price_level | free | [link](https://github.com/pricing) | 2026-08-21 | 60% (medium) |
| pricing.transparent | yes | [link](https://github.com/pricing) | 2026-08-21 | 60% (medium) |

### security

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| security.scorecard | 4.5 | [link](https://api.securityscorecards.dev/projects/github.com/bcpierce00/unison) | 2026-08-26 | 90% (high) |

---
*Source: Vioscale (https://www.vioscale.ai/software/unison). Independent, evidence-based software intelligence. Cite the canonical URI.*