# Bun vs uv

**Leader by Vioscale score:** Bun

| Attribute | Bun | uv |
|---|---|---|
| **Vioscale score** | 74.2 (70% (medium)) | 66.8 (77% (high)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 21,486 | 2 |
| adoption.github_stars | 95,712 | 89,118 |
| adoption.package_downloads_weekly | 3,314,443 | 44,329,091 |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | Bun is a JavaScript runtime and development toolkit designed as a fast alternative to Node.js with built-in package management, testing, and bundling capabilities. It can be adopted incrementally into existing Node.js projects or used as a complete replacement for development tooling. | A unified command-line tool that consolidates the functionality of multiple Python package management and development utilities into a single interface. It delivers substantially faster dependency resolution and installation compared to traditional package managers. |
| features.capabilities | `{"role":"manager_client","ecosystem":"js","deployment":"cli_local","workspaces":true,"pricing_model":"free","upstream_proxy":true,"package_formats":"multi","vuln_license_scanning":true,"supply_chain_integrity":true}` | `{"role":"manager_client","ecosystem":"python","deployment":"cli_local","workspaces":true,"open_source":"oss","pricing_model":"free","package_formats":"multi","lockfile_deterministic":true,"supply_chain_integrity":true}` |
| integrations.count | - | 17 |
| integrations.list | - | `[{"name":"Docker"},{"name":"GitHub Actions"},{"name":"GitLab CI/CD"},{"name":"AWS Lambda"},{"name":"Azure Artifacts"},{"name":"AWS CodeArtifact"},{"name":"JFrog Artifactory"},{"name":"PyTorch"},{"name":"FastAPI"},{"name":"Jupyter"}]` |
| language.primary | Rust | Rust |
| license.spdx | MIT | Apache-2.0 |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"free","freeTier":true,"sourceUrl":"https://bun.sh","retrievedAt":"2026-08-14T08:38:04.509Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://docs.astral.sh/uv","retrievedAt":"2026-08-14T09:24:16.660Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | free | free |
| release.cadence_days | 14 | 3 |
| release.history | `[{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.4.0","date":"2026-08-20T14:07:21Z","type":"stable","version":"bun-v1.4.0"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.14","date":"2026-05-13T03:48:28Z","type":"stable","version":"bun-v1.3.14"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.13","date":"2026-04-20T08:07:57Z","type":"stable","version":"bun-v1.3.13"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.12","date":"2026-04-10T03:04:46Z","type":"stable","version":"bun-v1.3.12"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.11","date":"2026-03-18T04:31:40Z","type":"stable","version":"bun-v1.3.11"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.10","date":"2026-02-26T07:08:20Z","type":"stable","version":"bun-v1.3.10"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.9","date":"2026-02-08T09:31:23Z","type":"stable","version":"bun-v1.3.9"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.8","date":"2026-01-29T10:38:16Z","type":"stable","version":"bun-v1.3.8"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.7","date":"2026-01-27T07:04:03Z","type":"stable","version":"bun-v1.3.7"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.6","date":"2026-01-13T02:27:21Z","type":"stable","version":"bun-v1.3.6"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.5","date":"2025-12-17T16:55:41Z","type":"stable","version":"bun-v1.3.5"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.4","date":"2025-12-07T04:53:19Z","type":"stable","version":"bun-v1.3.4"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.3","date":"2025-11-21T19:32:02Z","type":"stable","version":"bun-v1.3.3"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.2","date":"2025-11-08T07:57:10Z","type":"stable","version":"bun-v1.3.2"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.1","date":"2025-10-22T07:53:48Z","type":"stable","version":"bun-v1.3.1"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.0","date":"2025-10-10T20:32:14Z","type":"stable","version":"bun-v1.3.0"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.2.23","date":"2025-09-28T14:23:34Z","type":"stable","version":"bun-v1.2.23"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.2.22","date":"2025-09-14T13:01:31Z","type":"stable","version":"bun-v1.2.22"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.2.21","date":"2025-08-25T11:51:34Z","type":"stable","version":"bun-v1.2.21"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.2.20","date":"2025-08-10T12:07:43Z","type":"stable","version":"bun-v1.2.20"}]` | `[{"url":"https://github.com/astral-sh/uv/releases/tag/0.12.6","date":"2026-08-25T19:41:07Z","type":"stable","version":"0.12.6"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.12.5","date":"2026-08-14T19:57:52Z","type":"stable","version":"0.12.5"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.12.4","date":"2026-08-13T21:16:08Z","type":"stable","version":"0.12.4"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.12.3","date":"2026-08-07T16:34:42Z","type":"stable","version":"0.12.3"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.12.2","date":"2026-08-05T19:22:56Z","type":"stable","version":"0.12.2"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.12.1","date":"2026-07-31T19:43:31Z","type":"stable","version":"0.12.1"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.12.0","date":"2026-07-28T18:58:12Z","type":"stable","version":"0.12.0"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.33","date":"2026-07-28T10:37:25Z","type":"stable","version":"0.11.33"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.32","date":"2026-07-23T23:17:45Z","type":"stable","version":"0.11.32"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.31","date":"2026-07-22T01:49:40Z","type":"stable","version":"0.11.31"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.30","date":"2026-07-20T20:48:06Z","type":"stable","version":"0.11.30"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.29","date":"2026-07-15T18:44:43Z","type":"stable","version":"0.11.29"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.28","date":"2026-07-07T23:14:13Z","type":"stable","version":"0.11.28"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.27","date":"2026-07-06T21:01:23Z","type":"stable","version":"0.11.27"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.26","date":"2026-06-30T14:53:17Z","type":"stable","version":"0.11.26"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.25","date":"2026-06-27T00:49:49Z","type":"stable","version":"0.11.25"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.24","date":"2026-06-23T21:16:31Z","type":"stable","version":"0.11.24"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.23","date":"2026-06-19T18:42:52Z","type":"stable","version":"0.11.23"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.22","date":"2026-06-18T23:05:10Z","type":"stable","version":"0.11.22"},{"url":"https://github.com/astral-sh/uv/releases/tag/0.11.21","date":"2026-06-11T18:20:26Z","type":"stable","version":"0.11.21"}]` |
| security.vulnerabilities | `{"count":2,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=bun&per_page=100","last_12m":0,"max_severity":"HIGH"}` | `{"count":5,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=uv&per_page=100","last_12m":4,"max_severity":"MODERATE"}` |

## Capabilities (Package Registries)

| Capability | Bun | uv |
|---|:--:|:--:|
| **Core** |  |  |
| Role | Package manager client | Package manager client |
| **Ecosystem** |  |  |
| Ecosystem / language | JavaScript | Python |
| **Deployment** |  |  |
| Deployment | CLI-local | CLI-local |
| **Formats** |  |  |
| Package formats supported | Many formats | Many formats |
| **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 | Free / OSS |

*Source: Vioscale. Generated 2026-09-01T14:37:30.736Z. "-" = undocumented, not absent.*