# Poetry vs Yarn

| Attribute | Poetry | Yarn |
|---|---|---|
| **Vioscale score** | 58.4 (79% (high)) | 61.7 (71% (medium)) |
| activity.commits_last_30d | 8 | 18 |
| adoption.dependent_repos | 1,968 | 13,468 |
| adoption.github_stars | 34,293 | 8,100 |
| adoption.package_downloads_weekly | 15,796,363 | 9,559,608 |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | 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. | 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. |
| features.capabilities | `{"role":"manager_client","ecosystem":"python","deployment":"cli_local","open_source":"oss","pricing_model":"free","package_formats":"multi","private_packages":true,"lockfile_deterministic":true}` | `{"role":"manager_client","ecosystem":"js","deployment":"cli_local","workspaces":true,"open_source":"oss","pricing_model":"free","package_formats":"multi","private_packages":true}` |
| integrations.count | 1 | - |
| integrations.list | `[{"name":"PyPI"}]` | - |
| language.primary | Python | TypeScript |
| license.spdx | MIT | BSD-2-Clause |
| platform.support | `{"cli":true}` | `{"cli":true}` |
| pricing | `{"type":"free","sourceUrl":"https://python-poetry.org","retrievedAt":"2026-08-14T08:32:09.718Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://yarnpkg.com","retrievedAt":"2026-08-13T18:17:55.345Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 34 | 15 |
| release.history | `[{"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"},{"url":"https://github.com/python-poetry/poetry/releases/tag/1.8.5","date":"2024-12-06T16:29:16Z","type":"stable","version":"1.8.5"},{"url":"https://github.com/python-poetry/poetry/releases/tag/1.8.4","date":"2024-10-14T15:43:01Z","type":"stable","version":"1.8.4"},{"url":"https://github.com/python-poetry/poetry/releases/tag/1.8.3","date":"2024-05-08T13:45:03Z","type":"stable","version":"1.8.3"},{"url":"https://github.com/python-poetry/poetry/releases/tag/1.8.2","date":"2024-03-02T15:26:36Z","type":"stable","version":"1.8.2"}]` | `[{"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"},{"url":"https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.8.1","date":"2025-03-30T08:45:27Z","type":"stable","version":"@yarnpkg/cli/4.8.1"}]` |
| reliability.status_page | - | yes |
| security.scorecard | 3 | 3.4 |
| security.vulnerabilities | `{"count":5,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=poetry&per_page=100","last_12m":2,"max_severity":"CRITICAL"}` | `{"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 | Poetry | Yarn |
|---|:--:|:--:|
| **Core** |  |  |
| Role | Package manager client | Package manager client |
| **Ecosystem** |  |  |
| Ecosystem / language | Python | JavaScript |
| **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 | Open-source |
| **Pricing** |  |  |
| Pricing model | Free / OSS | Free / OSS |

*Source: Vioscale. Generated 2026-09-01T15:16:41.451Z. "-" = undocumented, not absent.*