# Composer/Packagist vs Poetry

| Attribute | Composer/Packagist | Poetry |
|---|---|---|
| **vioscaleAI score** | 62.6 (50% (medium)) | 58.9 (77% (high)) |
| activity.commits_last_30d | 51 | 28 |
| adoption.dependent_repos | 35,414 | 1,968 |
| adoption.github_stars | 29,550 | 34,312 |
| adoption.package_downloads_weekly | - | 10,044,020 |
| 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":"A command-line tool that manages Python project dependencies, enforces consistent builds across environments, packages code for distribution, and handles publication to package registries. It includes intelligent conflict resolution for dependencies and creates isolated virtual environments. It is indexed under Package Registries.","source":"https://python-poetry.org","question":"What is Poetry?","confidence":0.6},{"answer":"Poetry offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://python-poetry.org","question":"Is Poetry free?","confidence":0.6},{"answer":"Poetry supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://python-poetry.org","question":"What platforms does Poetry support?","confidence":0.6},{"answer":"Yes. Poetry can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://python-poetry.org","question":"Can Poetry be self-hosted?","confidence":0.6},{"answer":"Yes. Poetry 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/python-poetry/poetry","question":"Is Poetry open source?","confidence":0.95}]` |
| 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. | A tool for declaring, managing, and installing Python dependencies while supporting both package development and distribution through source distributions and wheels. |
| 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":"python","deployment":"cli_local","open_source":"oss","pricing_model":"free","package_formats":"multi","private_packages":true,"lockfile_deterministic":true}` |
| integrations.count | 4 | 1 |
| integrations.list | `[{"name":"GitHub"},{"name":"Git"},{"name":"Subversion"},{"name":"Mercurial"}]` | `[{"name":"PyPI"}]` |
| language.primary | PHP | Python |
| license.spdx | MIT | MIT |
| platform.support | `{"cli":true}` | `{"cli":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://packagist.org","retrievedAt":"2026-09-10T16:03:11.144Z"}` | `{"type":"free","sourceUrl":"https://python-poetry.org","retrievedAt":"2026-08-14T08:32:09.718Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 6 | 14 |
| 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/python-poetry/poetry/releases/tag/2.5.1","date":"2026-09-20T07:16:50Z","type":"stable","version":"2.5.1"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.5.0","date":"2026-09-19T18:12:41Z","type":"stable","version":"2.5.0"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.4.3","date":"2026-09-05T08:58:02Z","type":"stable","version":"2.4.3"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.4.2","date":"2026-08-29T19:16:50Z","type":"stable","version":"2.4.2"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.4.1","date":"2026-05-09T15:17:39Z","type":"stable","version":"2.4.1"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.4.0","date":"2026-05-03T15:04:59Z","type":"stable","version":"2.4.0"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.3.4","date":"2026-04-12T15:14:53Z","type":"stable","version":"2.3.4"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.3.3","date":"2026-03-29T12:23:09Z","type":"stable","version":"2.3.3"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.3.2","date":"2026-02-01T15:39:36Z","type":"stable","version":"2.3.2"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.3.1","date":"2026-01-20T14:51:42Z","type":"stable","version":"2.3.1"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.3.0","date":"2026-01-18T13:44:52Z","type":"stable","version":"2.3.0"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.2.1","date":"2025-09-21T14:50:15Z","type":"stable","version":"2.2.1"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.2.0","date":"2025-09-14T11:43:56Z","type":"stable","version":"2.2.0"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.1.4","date":"2025-08-05T03:52:52Z","type":"stable","version":"2.1.4"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.1.3","date":"2025-05-04T13:37:05Z","type":"stable","version":"2.1.3"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.1.2","date":"2025-03-29T21:38:44Z","type":"stable","version":"2.1.2"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.1.1","date":"2025-02-16T21:04:55Z","type":"stable","version":"2.1.1"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.1.0","date":"2025-02-15T14:07:10Z","type":"stable","version":"2.1.0"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.0.1","date":"2025-01-12T05:10:10Z","type":"stable","version":"2.0.1"},{"url":"https://github.com/python-poetry/poetry/releases/tag/2.0.0","date":"2025-01-05T11:53:49Z","type":"stable","version":"2.0.0"}]` |
| reliability.status_page | yes | yes |
| security.disclosure_policy | yes | - |
| security.scorecard | 5.9 | 3.1 |
| 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":5,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=poetry&per_page=100","last_12m":2,"max_severity":"CRITICAL"}` |

## Capabilities (Package Registries)

| Capability | Composer/Packagist | Poetry |
|---|:--:|:--:|
| **Core** |  |  |
| Role | Public registry | Package manager client |
| **Ecosystem** |  |  |
| Ecosystem / language | PHP | Python |
| **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 2026-10-16T19:19:36.511Z. "-" = undocumented, not absent.*