# Biome vs Checkstyle

**Leader by vioscaleAI score:** Biome

| Attribute | Biome | Checkstyle |
|---|---|---|
| **vioscaleAI score** | 68.2 (68% (medium)) | 60.1 (49% (low)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 587 | 1,425 |
| adoption.github_stars | 25,952 | 9,599 |
| adoption.package_downloads_weekly | 17,944,016 | - |
| content.faq | `[{"answer":"A fast command-line tool that formats and lints JavaScript, TypeScript, and web-related file types, combining formatter and linter functionality to streamline development workflows. It is indexed under Code Quality Tools.","source":"https://biomejs.dev","question":"What is Biome?","confidence":0.6},{"answer":"Biome offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://biomejs.dev","question":"Is Biome free?","confidence":0.6},{"answer":"Biome supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://biomejs.dev","question":"What platforms does Biome support?","confidence":0.6},{"answer":"Yes. Biome can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://biomejs.dev","question":"Can Biome be self-hosted?","confidence":0.6},{"answer":"Yes. Biome is published under the Apache-2.0 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/biomejs/biome","question":"Is Biome open source?","confidence":0.67}]` | `[{"answer":"A development tool that automatically scans Java code to verify adherence to coding standards, detecting style violations, design problems, and formatting issues. Supports customizable rule sets and integrates with build tools and IDEs. It is indexed under Code Quality Tools.","source":"https://checkstyle.org/","question":"What is Checkstyle?","confidence":0.6},{"answer":"Checkstyle supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://checkstyle.org/","question":"What platforms does Checkstyle support?","confidence":0.6},{"answer":"Yes. Checkstyle can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://checkstyle.org/","question":"Can Checkstyle be self-hosted?","confidence":0.6},{"answer":"Yes. Checkstyle is published under the LGPL-2.1 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/checkstyle/checkstyle","question":"Is Checkstyle open source?","confidence":0.95}]` |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | An all-in-one code formatter and linter built with Rust that can format code, identify issues, and improve code quality with high performance and minimal setup required. | Checkstyle analyzes Java source code against configurable rules covering naming, imports, formatting, Javadoc, and class design. It enables teams to maintain consistent coding standards through CLI, IDE plugins, and CI/CD integrations. |
| features.capabilities | `{"autofix":true,"function":"linter_formatter","ci_gating":true,"deployment":"cli_local","open_source":"oss","config_model":"zero_config","impl_language":"Rust","pricing_model":"free","language_scope":"multi_language","editor_integration":true}` | `{"autofix":false,"metrics":true,"function":"static_analyzer","ci_gating":true,"deployment":"cli_local","open_source":"oss","config_model":"config_file","custom_rules":true,"impl_language":"Java","pricing_model":"free","language_scope":"single_language","editor_integration":true}` |
| integrations.count | 3 | 7 |
| integrations.list | `[{"name":"ESLint"},{"name":"TypeScript ESLint"},{"name":"Prettier"}]` | `[{"name":"Maven"},{"name":"Ant"},{"name":"Eclipse","native":true,"category":"ide"},{"name":"IntelliJ IDEA","native":true,"category":"ide"},{"name":"Neovim","native":true,"category":"editor"},{"name":"Code Climate","native":true,"category":"code_quality"},{"name":"GitHub Actions","native":true,"category":"ci"},{"name":"Apache Ant","native":true,"category":"build_tool"}]` |
| language.primary | Rust | Java |
| license.spdx | Apache-2.0 | LGPL-2.1 |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true}` | `{"cli":true}` |
| pricing | `{"type":"hybrid","summary":"Open source with optional commercial support available","freeTier":true,"sourceUrl":"https://biomejs.dev","retrievedAt":"2026-10-14T22:38:11.019Z"}` | `{"type":"open_source","sourceUrl":"https://checkstyle.org/","retrievedAt":"2026-10-14T22:30:54.455Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | open_source |
| pricing.price_level | low | free |
| pricing.transparent | no | yes |
| release.cadence_days | 6 | 13 |
| release.history | `[{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.15","date":"2026-09-30T15:23:21Z","type":"stable","version":"@biomejs/biome@2.5.15"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.14","date":"2026-09-16T07:52:49Z","type":"stable","version":"@biomejs/biome@2.5.14"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.13","date":"2026-09-10T11:09:51Z","type":"stable","version":"@biomejs/biome@2.5.13"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.12","date":"2026-09-03T07:25:43Z","type":"stable","version":"@biomejs/biome@2.5.12"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.11","date":"2026-08-27T20:49:38Z","type":"stable","version":"@biomejs/biome@2.5.11"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.10","date":"2026-08-21T17:40:37Z","type":"stable","version":"@biomejs/biome@2.5.10"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.9","date":"2026-08-17T23:03:27Z","type":"stable","version":"@biomejs/biome@2.5.9"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.8","date":"2026-08-11T08:52:51Z","type":"stable","version":"@biomejs/biome@2.5.8"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.7","date":"2026-08-04T13:24:41Z","type":"stable","version":"@biomejs/biome@2.5.7"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.6","date":"2026-07-28T09:55:21Z","type":"stable","version":"@biomejs/biome@2.5.6"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.5","date":"2026-07-21T08:02:44Z","type":"stable","version":"@biomejs/biome@2.5.5"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.4","date":"2026-07-15T04:10:08Z","type":"stable","version":"@biomejs/biome@2.5.4"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.3","date":"2026-07-08T08:15:22Z","type":"stable","version":"@biomejs/biome@2.5.3"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.2","date":"2026-07-01T10:32:44Z","type":"stable","version":"@biomejs/biome@2.5.2"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.1","date":"2026-06-23T07:50:58Z","type":"stable","version":"@biomejs/biome@2.5.1"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/js-api%406.0.0","date":"2026-06-12T12:06:53Z","type":"stable","version":"@biomejs/js-api@6.0.0"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.0","date":"2026-06-12T12:09:51Z","type":"stable","version":"@biomejs/biome@2.5.0"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.4.16","date":"2026-05-27T13:43:14Z","type":"stable","version":"@biomejs/biome@2.4.16"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.4.15","date":"2026-05-09T17:09:39Z","type":"stable","version":"@biomejs/biome@2.4.15"},{"url":"https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.4.14","date":"2026-05-01T19:24:12Z","type":"stable","version":"@biomejs/biome@2.4.14"}]` | `[{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-14.3.0","date":"2026-09-27T15:22:48Z","type":"stable","version":"checkstyle-14.3.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-14.2.0","date":"2026-09-27T14:43:29Z","type":"stable","version":"checkstyle-14.2.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-14.1.0","date":"2026-08-30T14:47:48Z","type":"stable","version":"checkstyle-14.1.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-14.0.0","date":"2026-08-18T13:09:20Z","type":"stable","version":"checkstyle-14.0.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.11.0","date":"2026-08-16T21:52:20Z","type":"stable","version":"checkstyle-13.11.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.10.0","date":"2026-08-09T17:48:41Z","type":"stable","version":"checkstyle-13.10.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.9.0","date":"2026-07-27T01:04:59Z","type":"stable","version":"checkstyle-13.9.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.8.0","date":"2026-07-12T02:55:15Z","type":"stable","version":"checkstyle-13.8.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.7.0","date":"2026-06-28T15:13:54Z","type":"stable","version":"checkstyle-13.7.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.6.0","date":"2026-06-15T03:24:52Z","type":"stable","version":"checkstyle-13.6.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.5.0","date":"2026-05-30T20:22:13Z","type":"stable","version":"checkstyle-13.5.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.4.2","date":"2026-05-02T04:07:51Z","type":"stable","version":"checkstyle-13.4.2"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.4.1","date":"2026-04-27T12:43:10Z","type":"stable","version":"checkstyle-13.4.1"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.4.0","date":"2026-03-29T17:41:44Z","type":"stable","version":"checkstyle-13.4.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.3.0","date":"2026-02-28T17:36:40Z","type":"stable","version":"checkstyle-13.3.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.2.0","date":"2026-02-05T20:28:40Z","type":"stable","version":"checkstyle-13.2.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.1.0","date":"2026-01-31T17:26:20Z","type":"stable","version":"checkstyle-13.1.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-13.0.0","date":"2026-01-04T23:48:39Z","type":"stable","version":"checkstyle-13.0.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-12.3.1","date":"2025-12-31T15:42:54Z","type":"stable","version":"checkstyle-12.3.1"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-12.3.0","date":"2025-12-13T15:50:49Z","type":"stable","version":"checkstyle-12.3.0"}]` |
| reliability.status_page | - | yes |
| security.scorecard | - | 7 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40biomejs%2Fbiome&per_page=100","last_12m":0,"max_severity":null}` | `{"count":2,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=com.puppycrawl.tools%3Acheckstyle&per_page=100","last_12m":0,"max_severity":"MODERATE"}` |

## Capabilities (Code Quality Tools)

| Capability | Biome | Checkstyle |
|---|:--:|:--:|
| **Core** |  |  |
| Function | Linter + formatter | Static analyzer |
| Language scope | Multi-language | Single-language |
| Implementation language | Rust | Java |
| **Capability** |  |  |
| Autofix | ✓ | ✗ |
| **Config** |  |  |
| Config model | Zero-config | Config file |
| **Extensibility** |  |  |
| Custom rules | - | ✓ |
| **Deployment** |  |  |
| Deployment | CLI-local | CLI-local |
| **Delivery** |  |  |
| Editor integration | ✓ | ✓ |
| CI / VCS gating | ✓ | ✓ |
| **Insight** |  |  |
| Code metrics | - | ✓ |
| **Performance** |  |  |
| Incremental / monorepo aware | - | - |
| **Licensing** |  |  |
| Open-source | OSS | OSS |
| **Commercial** |  |  |
| Pricing model | Free | Free |

*Source: vioscaleAI. Generated 2026-10-16T20:13:00.803Z. "-" = undocumented, not absent.*