# Composer/Packagist vs Yarn

| Attribute | Composer/Packagist | Yarn |
|---|---|---|
| **vioscaleAI score** | 62.6 (50% (medium)) | 63.5 (75% (high)) |
| activity.commits_last_30d | 51 | 18 |
| adoption.dependent_repos | 35,414 | 13,468 |
| adoption.github_stars | 29,550 | 8,110 |
| adoption.package_downloads_weekly | - | 9,428,906 |
| content.faq | `[{"answer":"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. It is indexed under Package Registries.","source":"https://packagist.org","question":"What is Composer/Packagist?","confidence":0.6},{"answer":"Composer/Packagist offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://packagist.org","question":"Is Composer/Packagist free?","confidence":0.6},{"answer":"Composer/Packagist supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://packagist.org","question":"What platforms does Composer/Packagist support?","confidence":0.6},{"answer":"Yes. Composer/Packagist can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://packagist.org","question":"Can Composer/Packagist be self-hosted?","confidence":0.6},{"answer":"We have confirmed 3 integrations for Composer/Packagist, including GitHub, Subversion and Mercurial. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://packagist.org","question":"What does Composer/Packagist integrate with?","confidence":0.6},{"answer":"Yes. Composer/Packagist is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/composer/composer","question":"Is Composer/Packagist open source?","confidence":0.95}]` | `[{"answer":"Yarn is a package manager that functions as both a package and project manager, supporting everything from simple projects to industry monorepos for open source developers and enterprise users. It is indexed under Package Registries.","source":"https://yarnpkg.com","question":"What is Yarn?","confidence":0.6},{"answer":"Yarn is open source, so it can be self-hosted and used at no licence cost. It is released under the BSD-2-Clause licence. Pricing changes often, so verify at source before relying on it.","source":"https://yarnpkg.com","question":"Is Yarn free to use?","confidence":0.6},{"answer":"Yarn supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://yarnpkg.com","question":"What platforms does Yarn support?","confidence":0.6},{"answer":"Yes. Yarn can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://yarnpkg.com","question":"Can Yarn be self-hosted?","confidence":0.6},{"answer":"Yes. Yarn is published under the BSD-2-Clause licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/yarnpkg/berry","question":"Is Yarn open source?","confidence":0.99}]` |
| deployment.options | `{"cloud":true,"self_hosted":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. | Yarn is a modern package manager for JavaScript projects that prioritizes deterministic installations and includes built-in support for monorepos. It provides a complete solution for managing both dependencies and project structure with a focus on reliability and security. |
| 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":"manager_client","ecosystem":"js","deployment":"cli_local","workspaces":true,"open_source":"oss","pricing_model":"free","package_formats":"multi","private_packages":true,"vuln_license_scanning":true,"lockfile_deterministic":true,"supply_chain_integrity":true}` |
| integrations.count | 4 | 3 |
| integrations.list | `[{"name":"GitHub"},{"name":"Git"},{"name":"Subversion"},{"name":"Mercurial"}]` | `[{"name":"GitHub","native":true},{"name":"Git","native":true},{"name":"npm","native":true}]` |
| language.primary | PHP | TypeScript |
| license.spdx | MIT | BSD-2-Clause |
| platform.support | `{"cli":true}` | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://packagist.org","retrievedAt":"2026-09-10T16:03:11.144Z"}` | `{"type":"open_source","sourceUrl":"https://yarnpkg.com","retrievedAt":"2026-10-15T09:20:33.013Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 6 | 20 |
| release.history | `[{"url":"https://github.com/composer/composer/releases/tag/2.10.3","date":"2026-08-27T11:41:32Z","type":"stable","version":"2.10.3"},{"url":"https://github.com/composer/composer/releases/tag/2.2.30","date":"2026-08-27T11:41:29Z","type":"stable","version":"2.2.30"},{"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/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.18.1","date":"2026-09-24T20:40:35Z","type":"stable","version":"@yarnpkg/cli/4.18.1"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.18.0","date":"2026-07-29T07:56:33Z","type":"stable","version":"@yarnpkg/cli/4.18.0"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.17.1","date":"2026-07-08T16:48:56Z","type":"stable","version":"@yarnpkg/cli/4.17.1"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.17.0","date":"2026-06-15T08:28:48Z","type":"stable","version":"@yarnpkg/cli/4.17.0"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.16.0","date":"2026-06-02T07:11:32Z","type":"stable","version":"@yarnpkg/cli/4.16.0"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.15.0","date":"2026-05-19T22:20:46Z","type":"stable","version":"@yarnpkg/cli/4.15.0"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.14.1","date":"2026-04-17T06:00:10Z","type":"stable","version":"@yarnpkg/cli/4.14.1"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.14.0","date":"2026-04-16T15:45:42Z","type":"stable","version":"@yarnpkg/cli/4.14.0"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.13.0","date":"2026-03-03T02:12:57Z","type":"stable","version":"@yarnpkg/cli/4.13.0"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.12.0","date":"2025-11-23T11:09:03Z","type":"stable","version":"@yarnpkg/cli/4.12.0"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.11.0","date":"2025-11-07T13:52:43Z","type":"stable","version":"@yarnpkg/cli/4.11.0"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.10.3","date":"2025-09-23T09:42:00Z","type":"stable","version":"@yarnpkg/cli/4.10.3"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.10.2","date":"2025-09-18T17:57:07Z","type":"stable","version":"@yarnpkg/cli/4.10.2"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.10.1","date":"2025-09-18T12:53:06Z","type":"stable","version":"@yarnpkg/cli/4.10.1"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.10.0","date":"2025-09-18T09:18:24Z","type":"stable","version":"@yarnpkg/cli/4.10.0"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.9.4","date":"2025-08-26T07:12:31Z","type":"stable","version":"@yarnpkg/cli/4.9.4"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.9.3","date":"2025-08-20T12:15:54Z","type":"stable","version":"@yarnpkg/cli/4.9.3"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.9.2","date":"2025-06-03T20:25:28Z","type":"stable","version":"@yarnpkg/cli/4.9.2"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.9.1","date":"2025-04-11T09:04:22Z","type":"stable","version":"@yarnpkg/cli/4.9.1"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.9.0","date":"2025-04-09T14:12:16Z","type":"stable","version":"@yarnpkg/cli/4.9.0"}]` |
| reliability.status_page | yes | yes |
| security.disclosure_policy | yes | - |
| security.scorecard | 5.9 | 3.4 |
| security.trust_center | - | https://yarnpkg.com/features/security |
| security.vulnerabilities | `{"count":17,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=packagist&package_name=composer%2Fcomposer&per_page=100","last_12m":9,"max_severity":"HIGH"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40yarnpkg%2Fparsers&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Package Registries)

| Capability | Composer/Packagist | Yarn |
|---|:--:|:--:|
| **Core** |  |  |
| Role | Public registry | Package manager client |
| **Ecosystem** |  |  |
| Ecosystem / language | PHP | JavaScript |
| **Deployment** |  |  |
| Deployment | Both | CLI-local |
| **Formats** |  |  |
| Package formats supported | Single ecosystem | 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 | Open-source |
| **Pricing** |  |  |
| Pricing model | Free / OSS | Free / OSS |

*Source: vioscaleAI. Generated 2026-10-16T20:54:01.183Z. "-" = undocumented, not absent.*