# JSR vs Yarn

**Leader by vioscaleAI score:** Yarn

| Attribute | JSR | Yarn |
|---|---|---|
| **vioscaleAI score** | 46.5 (42% (low)) | 63.5 (75% (high)) |
| activity.commits_last_30d | 57 | 18 |
| adoption.dependent_repos | 0 | 13,468 |
| adoption.github_stars | 2,977 | 8,110 |
| adoption.package_downloads_weekly | - | 9,428,906 |
| content.faq | `[{"answer":"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. It is indexed under Package Registries.","source":"https://jsr.io","question":"What is JSR?","confidence":0.6},{"answer":"JSR is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.","source":"https://jsr.io","question":"Is JSR free to use?","confidence":0.6},{"answer":"JSR supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://jsr.io","question":"What platforms does JSR support?","confidence":0.6},{"answer":"Yes. JSR can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://jsr.io","question":"Can JSR be self-hosted?","confidence":0.6},{"answer":"We have confirmed 6 integrations for JSR, including Node.js, Deno, Bun, Cloudflare Workers, npm and Algolia. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://jsr.io","question":"What does JSR integrate with?","confidence":0.6},{"answer":"Yes. JSR 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/jsr-io/jsr","question":"Is JSR 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 | 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. | 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":"polyglot","deployment":"saas","open_source":"oss","pricing_model":"free","package_formats":"single","private_packages":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 | 6 | 3 |
| integrations.list | `[{"name":"Node.js"},{"name":"Deno"},{"name":"Bun"},{"name":"Cloudflare Workers"},{"name":"npm"},{"name":"Algolia"},{"name":"GitHub","native":true}]` | `[{"name":"GitHub","native":true},{"name":"Git","native":true},{"name":"npm","native":true}]` |
| language.primary | Rust | TypeScript |
| license.spdx | MIT | BSD-2-Clause |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"web":true}` | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"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"}` | `{"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 | - | 20 |
| release.history | - | `[{"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 |
| security.scorecard | 7.3 | 3.4 |
| security.trust_center | - | https://yarnpkg.com/features/security |
| security.vulnerabilities | `{"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}` | `{"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 | JSR | Yarn |
|---|:--:|:--:|
| **Core** |  |  |
| Role | Public registry | Package manager client |
| **Ecosystem** |  |  |
| Ecosystem / language | Polyglot | JavaScript |
| **Deployment** |  |  |
| Deployment | SaaS | 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 2026-10-16T21:50:48.318Z. "-" = undocumented, not absent.*