# Composer/Packagist vs JSR

**Leader by Vioscale score:** Composer/Packagist

| Attribute | Composer/Packagist | JSR |
|---|---|---|
| **Vioscale score** | 63.4 (51% (medium)) | 47 (46% (low)) |
| activity.commits_last_30d | 14 | 48 |
| adoption.dependent_repos | 35,414 | 0 |
| adoption.github_stars | 29,504 | 2,969 |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | 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. | An open-source package registry for JavaScript and TypeScript that publishes ECMAScript modules natively. It works across multiple JavaScript runtimes including Node.js, Deno, Bun, and Cloudflare Workers, with built-in TypeScript support, automatic documentation generation, and interoperability with npm packages. |
| features.capabilities | `{"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}` | `{"role":"public_registry","ecosystem":"polyglot","deployment":"saas","open_source":"oss","pricing_model":"free","package_formats":"single","private_packages":true,"supply_chain_integrity":true}` |
| integrations.count | 4 | 6 |
| integrations.list | `[{"name":"GitHub"},{"name":"Git"},{"name":"Subversion"},{"name":"Mercurial"}]` | `[{"name":"Node.js"},{"name":"Deno"},{"name":"Bun"},{"name":"Cloudflare Workers"},{"name":"npm"},{"name":"Algolia"}]` |
| language.primary | PHP | Rust |
| license.spdx | MIT | MIT |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | `{"cli":true,"web":true}` |
| pricing | `{"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"}` | `{"type":"free","plans":[{"free":true,"name":"Public","features":["Publish packages","ECMAScript modules","Automatic API documentation","TypeScript support","Cross-runtime compatibility"],"description":"Free public package registry","contactSales":false}],"summary":"Free and open-source","freeTier":true,"sourceUrl":"https://jsr.io","retrievedAt":"2026-08-14T08:31:11.032Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | free | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 6 | - |
| release.history | `[{"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 | 5.4 |
| security.vulnerabilities | `{"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"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fjsr-io%2Fjsr&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Package Registries)

| Capability | Composer/Packagist | JSR |
|---|:--:|:--:|
| **Core** |  |  |
| Role | Public registry | Public registry |
| **Ecosystem** |  |  |
| Ecosystem / language | PHP | Polyglot |
| **Deployment** |  |  |
| Deployment | Both | SaaS |
| **Formats** |  |  |
| Package formats supported | Single ecosystem | 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 | Open-source |
| **Pricing** |  |  |
| Pricing model | Free / OSS | Free / OSS |

*Source: Vioscale. Generated 2026-09-01T17:10:13.095Z. "-" = undocumented, not absent.*