# Metro vs Rspack

| Attribute | Metro | Rspack |
|---|---|---|
| **vioscaleAI score** | 65.9 (66% (medium)) | 63.8 (65% (medium)) |
| activity.commits_last_30d | 73 | 100 |
| adoption.dependent_repos | 305,465 | 18 |
| adoption.github_stars | 5,648 | 12,939 |
| content.faq | `[{"answer":"Optimized JavaScript bundler for React Native that prioritizes rapid feedback cycles and supports large-scale projects with thousands of modules. It is indexed under Bundlers.","source":"https://metrobundler.dev","question":"What is Metro?","confidence":0.6},{"answer":"Metro 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://metrobundler.dev","question":"Is Metro free to use?","confidence":0.6},{"answer":"Metro supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://metrobundler.dev","question":"What platforms does Metro support?","confidence":0.6},{"answer":"Yes. Metro can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://metrobundler.dev","question":"Can Metro be self-hosted?","confidence":0.6},{"answer":"Yes. Metro 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/facebook/metro","question":"Is Metro open source?","confidence":0.95}]` | `[{"answer":"Rspack is a bundler designed for web applications that replaces webpack with faster build speeds and incremental compilation. It maintains webpack API compatibility while delivering performance improvements for local development and production builds. It is indexed under Bundlers.","source":"https://rspack.dev","question":"What is Rspack?","confidence":0.6},{"answer":"Rspack 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://rspack.dev","question":"Is Rspack free to use?","confidence":0.6},{"answer":"Rspack supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://rspack.dev","question":"What platforms does Rspack support?","confidence":0.6},{"answer":"Yes. Rspack can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://rspack.dev","question":"Can Rspack be self-hosted?","confidence":0.6},{"answer":"We have confirmed 14 integrations for Rspack, including Rsbuild, Rslib, Rstest, Rslint, Docusaurus, Modern.js, Meteor and Next.js, plus 6 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://rspack.dev","question":"What does Rspack integrate with?","confidence":0.6},{"answer":"Yes. Rspack 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/web-infra-dev/rspack","question":"Is Rspack open source?","confidence":0.95}]` |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | Optimized JavaScript bundler for React Native that prioritizes rapid feedback cycles and supports large-scale projects with thousands of modules. | Rspack is a Rust-powered bundler designed as a drop-in replacement for webpack. It combines Rust's performance with JavaScript tools through parallel architecture to provide faster builds and superior developer experience with HMR. |
| features.capabilities | `{"source_maps":true,"dev_server_hmr":true}` | `{"open_source":true,"source_maps":true,"css_bundling":true,"tree_shaking":true,"code_splitting":true,"dev_server_hmr":true,"hmr_dev_server":true,"incremental_builds":true,"webpack_plugin_compat":true,"tree_shaking_code_splitting":true}` |
| integrations.count | - | 17 |
| integrations.list | - | `[{"name":"Rsbuild"},{"name":"Rslib"},{"name":"Rstest"},{"name":"Rslint"},{"name":"Docusaurus"},{"name":"Modern.js"},{"name":"Meteor"},{"name":"Next.js"},{"name":"Nuxt"},{"name":"Nx"},{"name":"React Native"},{"name":"Storybook"},{"name":"TanStack Router"},{"name":"TanStack Start"},{"name":"Rsdoctor","category":"development"},{"name":"Angular Rspack","category":"framework"},{"name":"Extension.js","category":"development"},{"name":"Re.Pack","category":"bundler"}]` |
| language.primary | JavaScript | Rust |
| license.spdx | MIT | MIT |
| platform.support | `{"cli":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://metrobundler.dev","retrievedAt":"2026-08-20T16:36:51.300Z"}` | `{"type":"open_source","sourceUrl":"https://rspack.dev","retrievedAt":"2026-10-14T21:34:18.033Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| release.cadence_days | 11 | 5 |
| release.history | `[{"url":"https://github.com/react/metro/releases/tag/v0.87.1","date":"2026-09-13T10:34:37Z","type":"stable","version":"v0.87.1"},{"url":"https://github.com/react/metro/releases/tag/v0.84.6","date":"2026-09-02T15:51:55Z","type":"stable","version":"v0.84.6"},{"url":"https://github.com/react/metro/releases/tag/v0.84.5","date":"2026-08-19T15:29:25Z","type":"stable","version":"v0.84.5"},{"url":"https://github.com/react/metro/releases/tag/v0.83.8","date":"2026-08-19T15:21:23Z","type":"stable","version":"v0.83.8"},{"url":"https://github.com/react/metro/releases/tag/v0.87.0","date":"2026-07-13T15:23:08Z","type":"stable","version":"v0.87.0"},{"url":"https://github.com/react/metro/releases/tag/v0.86.0","date":"2026-07-06T16:46:29Z","type":"stable","version":"v0.86.0"},{"url":"https://github.com/react/metro/releases/tag/v0.85.0","date":"2026-06-23T16:07:47Z","type":"stable","version":"v0.85.0"},{"url":"https://github.com/react/metro/releases/tag/v0.84.4","date":"2026-04-30T11:39:20Z","type":"stable","version":"v0.84.4"},{"url":"https://github.com/react/metro/releases/tag/v0.83.7","date":"2026-04-29T10:46:10Z","type":"stable","version":"v0.83.7"},{"url":"https://github.com/react/metro/releases/tag/v0.83.6","date":"2026-04-13T17:00:24Z","type":"stable","version":"v0.83.6"},{"url":"https://github.com/react/metro/releases/tag/v0.84.3","date":"2026-04-13T16:04:32Z","type":"stable","version":"v0.84.3"},{"url":"https://github.com/react/metro/releases/tag/v0.83.5","date":"2026-03-01T16:15:07Z","type":"stable","version":"v0.83.5"},{"url":"https://github.com/react/metro/releases/tag/v0.84.2","date":"2026-02-27T17:48:20Z","type":"stable","version":"v0.84.2"},{"url":"https://github.com/react/metro/releases/tag/v0.84.1","date":"2026-02-25T15:02:37Z","type":"stable","version":"v0.84.1"},{"url":"https://github.com/react/metro/releases/tag/v0.84.0","date":"2026-02-20T20:49:15Z","type":"stable","version":"v0.84.0"},{"url":"https://github.com/react/metro/releases/tag/v0.83.4","date":"2026-02-20T03:41:11Z","type":"stable","version":"v0.83.4"},{"url":"https://github.com/react/metro/releases/tag/v0.83.3","date":"2025-10-01T12:22:13Z","type":"stable","version":"v0.83.3"},{"url":"https://github.com/react/metro/releases/tag/v0.83.2","date":"2025-09-18T16:05:59Z","type":"stable","version":"v0.83.2"},{"url":"https://github.com/react/metro/releases/tag/v0.83.1","date":"2025-07-24T14:02:11Z","type":"stable","version":"v0.83.1"},{"url":"https://github.com/react/metro/releases/tag/v0.83.0","date":"2025-07-13T11:12:43Z","type":"stable","version":"v0.83.0"}]` | `[{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.9","date":"2026-10-13T08:50:05Z","type":"stable","version":"v2.2.9"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.8","date":"2026-09-28T14:55:37Z","type":"stable","version":"v2.2.8"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.7","date":"2026-09-23T02:17:31Z","type":"stable","version":"v2.2.7"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.6","date":"2026-09-17T11:25:48Z","type":"stable","version":"v2.2.6"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.5","date":"2026-09-16T02:19:52Z","type":"stable","version":"v2.2.5"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.4","date":"2026-09-14T12:39:24Z","type":"stable","version":"v2.2.4"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.3","date":"2026-09-08T09:10:07Z","type":"stable","version":"v2.2.3"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.2","date":"2026-09-01T13:19:14Z","type":"stable","version":"v2.2.2"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.1","date":"2026-08-27T11:34:25Z","type":"stable","version":"v2.2.1"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.0","date":"2026-08-26T03:42:56Z","type":"stable","version":"v2.2.0"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.0-rc.0","date":"2026-08-21T10:49:42Z","type":"prerelease","version":"v2.2.0-rc.0"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.2.0-beta.1","date":"2026-08-18T10:15:58Z","type":"prerelease","version":"v2.2.0-beta.1"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.1.10","date":"2026-08-13T10:32:13Z","type":"stable","version":"v2.1.10"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.1.9","date":"2026-08-11T15:43:55Z","type":"stable","version":"v2.1.9"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.1.8","date":"2026-08-04T11:09:32Z","type":"stable","version":"v2.1.8"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.1.7","date":"2026-07-29T09:21:11Z","type":"stable","version":"v2.1.7"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.1.6","date":"2026-07-28T09:04:39Z","type":"stable","version":"v2.1.6"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.1.5","date":"2026-07-21T11:56:09Z","type":"stable","version":"v2.1.5"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.1.4","date":"2026-07-14T14:10:08Z","type":"stable","version":"v2.1.4"},{"url":"https://github.com/web-infra-dev/rspack/releases/tag/v2.1.3","date":"2026-07-07T08:30:54Z","type":"stable","version":"v2.1.3"}]` |
| security.scorecard | 5.2 | - |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=metro-minify-uglify&per_page=100","last_12m":0,"max_severity":null}` | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40rspack%2Fcore&per_page=100","last_12m":0,"max_severity":"MODERATE"}` |

## Capabilities (Bundlers)

| Capability | Metro | Rspack |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Dev server hmr | ✓ | ✓ |
| Native esm dev | - | - |
| Code splitting | - | ✓ |
| Tree shaking | - | ✓ |
| Css bundling | - | ✓ |
| Zero config | - | - |
| Webpack plugin compat | - | ✓ |
| Rollup plugin compat | - | - |
| Monorepo aware | - | - |
| Source maps | ✓ | ✓ |

*Source: vioscaleAI. Generated 2026-10-16T19:27:58.181Z. "-" = undocumented, not absent.*