# Bun vs Composer/Packagist

**Leader by Vioscale score:** Bun

| Attribute | Bun | Composer/Packagist |
|---|---|---|
| **Vioscale score** | 74.2 (70% (medium)) | 63.4 (51% (medium)) |
| activity.commits_last_30d | 100 | 14 |
| adoption.dependent_repos | 21,486 | 35,414 |
| adoption.github_stars | 95,712 | 29,504 |
| adoption.package_downloads_weekly | 3,314,443 | - |
| deployment.options | `{"self_hosted":true}` | `{"cloud":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. | Composer is a PHP dependency management tool that uses a centralized package repository (Packagist.org) to discover and install project dependencies. It supports version control integration, security scanning, and both public and private package repositories. |
| 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":"public_registry","ecosystem":"php","deployment":"both","workspaces":true,"open_source":"oss","pricing_model":"free","upstream_proxy":true,"package_formats":"single","private_packages":true,"vuln_license_scanning":true,"lockfile_deterministic":true,"supply_chain_integrity":true}` |
| integrations.count | - | 4 |
| integrations.list | - | `[{"name":"GitHub"},{"name":"Git"},{"name":"Subversion"},{"name":"Mercurial"}]` |
| language.primary | Rust | PHP |
| license.spdx | MIT | MIT |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"free","freeTier":true,"sourceUrl":"https://bun.sh","retrievedAt":"2026-08-14T08:38:04.509Z"}` | `{"type":"free","summary":"Public registry is free. Private Packagist subscription plans available for commercial use.","freeTier":true,"sourceUrl":"https://packagist.org","retrievedAt":"2026-08-14T08:30:46.061Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | free |
| pricing.price_level | free | free |
| pricing.transparent | - | yes |
| release.cadence_days | 14 | 6 |
| 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/composer/composer/releases/tag/2.10.2","date":"2026-07-01T09:33:23Z","type":"stable","version":"2.10.2"},{"url":"https://github.com/composer/composer/releases/tag/2.2.29","date":"2026-07-01T09:32:54Z","type":"stable","version":"2.2.29"},{"url":"https://github.com/composer/composer/releases/tag/2.10.1","date":"2026-06-04T08:29:43Z","type":"stable","version":"2.10.1"},{"url":"https://github.com/composer/composer/releases/tag/2.10.0","date":"2026-05-28T10:53:10Z","type":"stable","version":"2.10.0"},{"url":"https://github.com/composer/composer/releases/tag/2.10.0-RC2","date":"2026-05-20T13:43:05Z","type":"prerelease","version":"2.10.0-RC2"},{"url":"https://github.com/composer/composer/releases/tag/2.9.8","date":"2026-05-13T07:40:30Z","type":"stable","version":"2.9.8"},{"url":"https://github.com/composer/composer/releases/tag/2.2.28","date":"2026-05-13T07:40:14Z","type":"stable","version":"2.2.28"},{"url":"https://github.com/composer/composer/releases/tag/1.10.28","date":"2026-05-13T09:07:04Z","type":"stable","version":"1.10.28"},{"url":"https://github.com/composer/composer/releases/tag/2.9.7","date":"2026-04-14T11:36:04Z","type":"stable","version":"2.9.7"},{"url":"https://github.com/composer/composer/releases/tag/2.9.6","date":"2026-04-14T09:46:45Z","type":"stable","version":"2.9.6"},{"url":"https://github.com/composer/composer/releases/tag/2.2.27","date":"2026-04-14T09:46:42Z","type":"stable","version":"2.2.27"},{"url":"https://github.com/composer/composer/releases/tag/2.10.0-RC1","date":"2026-04-01T14:00:19Z","type":"stable","version":"2.10.0-RC1"},{"url":"https://github.com/composer/composer/releases/tag/2.9.5","date":"2026-01-29T10:45:46Z","type":"stable","version":"2.9.5"},{"url":"https://github.com/composer/composer/releases/tag/2.9.4","date":"2026-01-22T13:12:55Z","type":"stable","version":"2.9.4"},{"url":"https://github.com/composer/composer/releases/tag/2.9.3","date":"2025-12-30T12:53:32Z","type":"stable","version":"2.9.3"},{"url":"https://github.com/composer/composer/releases/tag/2.2.26","date":"2025-12-30T12:52:58Z","type":"stable","version":"2.2.26"},{"url":"https://github.com/composer/composer/releases/tag/2.9.2","date":"2025-11-19T21:07:13Z","type":"stable","version":"2.9.2"},{"url":"https://github.com/composer/composer/releases/tag/2.9.1","date":"2025-11-13T15:18:16Z","type":"stable","version":"2.9.1"},{"url":"https://github.com/composer/composer/releases/tag/2.9.0","date":"2025-11-13T09:46:19Z","type":"stable","version":"2.9.0"},{"url":"https://github.com/composer/composer/releases/tag/2.9.0-RC1","date":"2025-11-07T14:20:05Z","type":"prerelease","version":"2.9.0-RC1"}]` |
| reliability.status_page | - | yes |
| security.disclosure_policy | - | yes |
| security.scorecard | - | 6.3 |
| 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":15,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=packagist&package_name=composer%2Fcomposer&per_page=100","last_12m":7,"max_severity":"HIGH"}` |

## Capabilities (Package Registries)

| Capability | Bun | Composer/Packagist |
|---|:--:|:--:|
| **Core** |  |  |
| Role | Package manager client | Public registry |
| **Ecosystem** |  |  |
| Ecosystem / language | JavaScript | PHP |
| **Deployment** |  |  |
| Deployment | CLI-local | Both |
| **Formats** |  |  |
| Package formats supported | Many formats | Single ecosystem |
| **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 2026-09-01T15:10:00.394Z. "-" = undocumented, not absent.*