# Bun vs pnpm

| Attribute | Bun | pnpm |
|---|---|---|
| **vioscaleAI score** | 74.2 (56% (medium)) | 70.2 (65% (medium)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 21,486 | 600 |
| adoption.github_stars | 96,235 | 36,813 |
| adoption.package_downloads_weekly | 3,990,852 | 223,195,967 |
| content.faq | `[{"answer":"Bun is a JavaScript runtime and development toolkit designed as a fast alternative to Node.js with built-in package management, testing, and bundling capabilities. It can be adopted incrementally into existing Node.js projects or used as a complete replacement for development tooling. It is indexed under Package Registries.","source":"https://bun.sh","question":"What is Bun?","confidence":0.6},{"answer":"Bun offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://bun.sh","question":"Is Bun free?","confidence":0.6},{"answer":"Bun supports Windows, macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://bun.sh","question":"What platforms does Bun support?","confidence":0.6},{"answer":"Yes. Bun can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://bun.sh","question":"Can Bun be self-hosted?","confidence":0.6},{"answer":"Yes. Bun 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://www.npmjs.com/package/bun","question":"Is Bun open source?","confidence":0.85}]` | `[{"answer":"A package manager for JavaScript projects that emphasizes fast performance and minimal disk space requirements. It is indexed under Package Registries.","source":"https://pnpm.io","question":"What is pnpm?","confidence":0.6},{"answer":"pnpm 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://pnpm.io","question":"Is pnpm free to use?","confidence":0.6},{"answer":"pnpm supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://pnpm.io","question":"What platforms does pnpm support?","confidence":0.6},{"answer":"Yes. pnpm can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://pnpm.io","question":"Can pnpm be self-hosted?","confidence":0.6},{"answer":"We have confirmed 7 integrations for pnpm, including GitHub Actions, AppVeyor, Azure Pipelines, Bitbucket Pipelines, CircleCI, npm and JSR. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://pnpm.io","question":"What does pnpm integrate with?","confidence":0.6},{"answer":"Yes. pnpm 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/pnpm/pnpm","question":"Is pnpm open source?","confidence":0.99}]` |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A JavaScript runtime that executes TypeScript natively using JavaScriptCore, bundling a package manager, bundler, and test runner with Node.js compatibility and npm ecosystem support. | A Node.js package manager that stores packages in a single content-addressable store and hard-links them into projects, eliminating duplication across projects and accelerating installation times |
| features.capabilities | `{"role":"manager_client","ecosystem":"js","deployment":"cli_local","workspaces":true,"open_source":"oss","pricing_model":"free","upstream_proxy":true,"package_formats":"multi","private_packages":true,"content_addressable":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","upstream_proxy":true,"package_formats":"multi","private_packages":true,"content_addressable":true,"vuln_license_scanning":true,"lockfile_deterministic":true,"supply_chain_integrity":true}` |
| integrations.count | - | 7 |
| integrations.list | - | `[{"name":"GitHub Actions"},{"name":"AppVeyor"},{"name":"Azure Pipelines"},{"name":"Bitbucket Pipelines"},{"name":"CircleCI"},{"name":"npm"},{"name":"JSR"},{"name":"GitLab CI","native":false,"category":"ci","direction":"inbound"},{"name":"Jenkins","native":false,"category":"ci","direction":"inbound"},{"name":"Semaphore","native":false,"category":"ci","direction":"inbound"},{"name":"Travis CI","native":false,"category":"ci","direction":"inbound"},{"name":"GitLab","native":true,"category":"ci_cd"}]` |
| language.primary | Rust | Rust |
| license.spdx | MIT | MIT |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","summary":"Free and open source","freeTier":true,"sourceUrl":"https://bun.sh","retrievedAt":"2026-10-14T22:32:45.643Z"}` | `{"type":"open_source","sourceUrl":"https://pnpm.io","retrievedAt":"2026-08-14T21:32:10.481Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| pricing.transparent | - | yes |
| release.cadence_days | 14 | - |
| release.history | `[{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.4.3","date":"2026-10-10T05:24:54Z","type":"stable","version":"bun-v1.4.3"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.4.2","date":"2026-09-05T05:55:48Z","type":"stable","version":"bun-v1.4.2"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.4.1","date":"2026-09-04T08:33:19Z","type":"stable","version":"bun-v1.4.1"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.4.0","date":"2026-08-20T14:07:21Z","type":"stable","version":"bun-v1.4.0"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.14","date":"2026-05-13T03:48:28Z","type":"stable","version":"bun-v1.3.14"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.13","date":"2026-04-20T08:07:57Z","type":"stable","version":"bun-v1.3.13"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.12","date":"2026-04-10T03:04:46Z","type":"stable","version":"bun-v1.3.12"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.11","date":"2026-03-18T04:31:40Z","type":"stable","version":"bun-v1.3.11"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.10","date":"2026-02-26T07:08:20Z","type":"stable","version":"bun-v1.3.10"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.9","date":"2026-02-08T09:31:23Z","type":"stable","version":"bun-v1.3.9"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.8","date":"2026-01-29T10:38:16Z","type":"stable","version":"bun-v1.3.8"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.7","date":"2026-01-27T07:04:03Z","type":"stable","version":"bun-v1.3.7"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.6","date":"2026-01-13T02:27:21Z","type":"stable","version":"bun-v1.3.6"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.5","date":"2025-12-17T16:55:41Z","type":"stable","version":"bun-v1.3.5"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.4","date":"2025-12-07T04:53:19Z","type":"stable","version":"bun-v1.3.4"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.3","date":"2025-11-21T19:32:02Z","type":"stable","version":"bun-v1.3.3"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.2","date":"2025-11-08T07:57:10Z","type":"stable","version":"bun-v1.3.2"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.1","date":"2025-10-22T07:53:48Z","type":"stable","version":"bun-v1.3.1"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.3.0","date":"2025-10-10T20:32:14Z","type":"stable","version":"bun-v1.3.0"},{"url":"https://github.com/oven-sh/bun/releases/tag/bun-v1.2.23","date":"2025-09-28T14:23:34Z","type":"stable","version":"bun-v1.2.23"}]` | `[{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.14.0","date":"2026-10-15T13:42:33Z","type":"stable","version":"v12.14.0"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v11.28.6","date":"2026-10-15T13:45:17Z","type":"stable","version":"v11.28.6"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.13.0","date":"2026-10-13T08:32:10Z","type":"stable","version":"v12.13.0"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.12.1","date":"2026-10-11T11:30:09Z","type":"stable","version":"v12.12.1"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v10.34.7","date":"2026-10-12T06:05:46Z","type":"stable","version":"v10.34.7"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.12.0","date":"2026-10-10T19:52:45Z","type":"stable","version":"v12.12.0"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.11.2","date":"2026-10-09T17:38:44Z","type":"stable","version":"v12.11.2"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.11.1","date":"2026-10-09T12:28:20Z","type":"stable","version":"v12.11.1"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.11.0","date":"2026-10-09T06:43:40Z","type":"stable","version":"v12.11.0"},{"url":"https://github.com/pnpm/pnpm/releases/tag/pnpr%400.1.0-alpha.15","date":"2026-10-10T12:35:55Z","type":"prerelease","version":"pnpr@0.1.0-alpha.15"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.10.1","date":"2026-10-06T17:37:30Z","type":"stable","version":"v12.10.1"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.10.0","date":"2026-10-06T05:24:45Z","type":"stable","version":"v12.10.0"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v11.28.5","date":"2026-10-06T05:27:13Z","type":"stable","version":"v11.28.5"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.9.1","date":"2026-10-03T20:48:42Z","type":"stable","version":"v12.9.1"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v11.28.4","date":"2026-10-03T20:48:54Z","type":"stable","version":"v11.28.4"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.9.0","date":"2026-10-02T22:28:05Z","type":"stable","version":"v12.9.0"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.8.2","date":"2026-09-30T01:08:47Z","type":"stable","version":"v12.8.2"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v11.28.3","date":"2026-09-30T15:28:07Z","type":"stable","version":"v11.28.3"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.8.1","date":"2026-09-28T17:40:12Z","type":"stable","version":"v12.8.1"},{"url":"https://github.com/pnpm/pnpm/releases/tag/v12.8.0","date":"2026-09-28T07:35:50Z","type":"stable","version":"v12.8.0"}]` |
| security.disclosure_policy | - | yes |
| security.scorecard | - | 6.8 |
| security.trust_center | - | https://pnpm.io/blog/tags/security |
| security.vulnerabilities | `{"count":2,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=bun&per_page=100","last_12m":0,"max_severity":"HIGH"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40pnpm%2Ferror&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Package Registries)

| Capability | Bun | pnpm |
|---|:--:|:--:|
| **Core** |  |  |
| Role | Package manager client | Package manager client |
| **Ecosystem** |  |  |
| Ecosystem / language | JavaScript | 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: vioscaleAI. Generated 2026-10-17T12:45:52.387Z. "-" = undocumented, not absent.*