# Bun

> A fast all-in-one JavaScript runtime

- **Canonical URI:** https://www.vioscale.ai/software/bun
- **Category:** Package Registries
- **Homepage:** https://bun.sh
- **Also known as:** bun
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-03T22:35:04.308Z

## Vioscale score

**79.6 / 100**, confidence 19% (low).

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

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| price_level | 0 | 4 | 0 | - |
| reliability | 0 | 8 | 0 | - |
| capabilities | 0 | 14 | 0 | - |
| github_stars | 93.9 | 4 | 375.7 | ✓ |
| integrations | 0 | 8 | 0 | - |
| github_activity | 63.1 | 16 | 1009.6 | ✓ |
| release_cadence | 90.6 | 10 | 905.6 | ✓ |
| security_posture | 0 | 26 | 0 | - |
| package_downloads | 84.1 | 22 | 1849.3 | ✓ |
| pricing_transparency | 0 | 6 | 0 | - |
| stackoverflow_activity | 0 | 8 | 0 | - |

## About

Bun is a fast, incrementally adoptable all-in-one JavaScript, TypeScript & JSX toolkit. Use individual tools like bun test or bun install in Node.js projects, or adopt the complete stack with a fast JavaScript runtime, bundler, test runner, and package manager built in.

_Independently observed._

## Platform & deployment

- **Platforms:** CLI, macOS, Linux, Windows

## Capabilities

_The capabilities that matter for Package Registries. "-" = undocumented, not absent._

| Capability | Supported |
|---|:--:|
| **Core** | |
| Role | Package manager client |
| **Ecosystem** | |
| Ecosystem / language | JavaScript |
| **Deployment** | |
| Deployment | CLI-local |
| **Formats** | |
| Package formats supported | - |
| **Hosting** | |
| Private / scoped packages | - |
| Upstream proxy / caching | - |
| **Resolution** | |
| Lockfile / deterministic installs | - |
| Workspaces / monorepo | - |
| Content-addressable store | - |
| **Supply chain** | |
| Supply-chain integrity | - |
| Vulnerability / licence scanning | - |
| **Licensing** | |
| Openness | Open-source |
| **Pricing** | |
| Pricing model | Free / OSS |

## 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 | 100 | [link](https://github.com/oven-sh/bun/pulse) | 2026-08-03 | 65% (medium) |

### adoption

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| adoption.github_stars | 95,258 | [link](https://github.com/oven-sh/bun) | 2026-08-03 | 90% (high) |
| adoption.package_downloads_weekly | 2,962,857 | [link](https://www.npmjs.com/package/bun) | 2026-08-03 | 85% (high) |

### language

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| language.primary | Rust | [link](https://github.com/oven-sh/bun) | 2026-08-03 | 90% (high) |

### license

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| license.spdx | MIT | [link](https://www.npmjs.com/package/bun) | 2026-08-03 | 85% (high) |

### pricing

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| pricing.model | commercial | [link](https://bun.sh) | 2026-08-03 | 40% (low) |

### release

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| release.cadence_days | 17 | [link](https://github.com/oven-sh/bun/releases) | 2026-08-03 | 70% (medium) |

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