# Checkstyle vs Clippy

| Attribute | Checkstyle | Clippy |
|---|---|---|
| **Vioscale score** | 61.4 (54% (medium)) | 66 (31% (low)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 1,425 | 256 |
| adoption.github_stars | 9,001 | 116,179 |
| deployment.options | `{"self_hosted":true}` | - |
| description.long | 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. | Clippy provides over 800 lints organized into configurable categories to catch common mistakes and improve Rust code quality. Lints are categorized by severity (correctness, suspicious, style, complexity, performance) and can be enabled or disabled individually. |
| features.capabilities | `{"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"}` | `{"function":"linter","deployment":"cli_local","open_source":"oss","impl_language":"Rust","pricing_model":"free","language_scope":"single_language"}` |
| integrations.count | 2 | - |
| integrations.list | `[{"name":"Maven"},{"name":"Ant"}]` | - |
| language.primary | Java | Rust |
| license.spdx | LGPL-2.1 | Apache-2.0 |
| platform.support | `{"cli":true}` | `{"cli":true}` |
| pricing | `{"type":"free","sourceUrl":"https://checkstyle.org/","retrievedAt":"2026-08-14T08:38:14.583Z"}` | `{"type":"open_source","sourceUrl":"https://doc.rust-lang.org/clippy/","retrievedAt":"2026-08-14T08:33:25.955Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 14 | 30 |
| release.history | `[{"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"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-12.2.0","date":"2025-11-30T13:55:29Z","type":"stable","version":"checkstyle-12.2.0"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-12.1.2","date":"2025-11-11T16:40:51Z","type":"stable","version":"checkstyle-12.1.2"},{"url":"https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-12.1.1","date":"2025-10-26T14:12:24Z","type":"stable","version":"checkstyle-12.1.1"}]` | `[{"url":"https://github.com/rust-lang/rust/releases/tag/1.98.0","date":"2026-08-20T18:05:33Z","type":"stable","version":"1.98.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.97.1","date":"2026-07-16T12:29:15Z","type":"stable","version":"1.97.1"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.97.0","date":"2026-07-09T12:25:16Z","type":"stable","version":"1.97.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.96.1","date":"2026-07-05T23:50:27Z","type":"stable","version":"1.96.1"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.96.0","date":"2026-05-28T17:50:42Z","type":"stable","version":"1.96.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.95.0","date":"2026-04-16T18:19:31Z","type":"stable","version":"1.95.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.94.1","date":"2026-03-26T13:03:20Z","type":"stable","version":"1.94.1"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.94.0","date":"2026-03-05T18:44:15Z","type":"stable","version":"1.94.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.93.1","date":"2026-02-12T20:26:57Z","type":"stable","version":"1.93.1"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.93.0","date":"2026-01-22T13:51:49Z","type":"stable","version":"1.93.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.92.0","date":"2025-12-11T14:58:25Z","type":"stable","version":"1.92.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.91.1","date":"2025-11-10T19:02:09Z","type":"stable","version":"1.91.1"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.91.0","date":"2025-10-30T18:29:40Z","type":"stable","version":"1.91.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.90.0","date":"2025-09-18T20:02:56Z","type":"stable","version":"1.90.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.89.0","date":"2025-08-07T10:55:11Z","type":"stable","version":"1.89.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.88.0","date":"2025-06-26T18:10:22Z","type":"stable","version":"1.88.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.87.0","date":"2025-05-15T17:28:21Z","type":"stable","version":"1.87.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.86.0","date":"2025-04-03T09:42:40Z","type":"stable","version":"1.86.0"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.85.1","date":"2025-03-23T03:09:05Z","type":"stable","version":"1.85.1"},{"url":"https://github.com/rust-lang/rust/releases/tag/1.85.0","date":"2025-02-20T17:09:32Z","type":"stable","version":"1.85.0"}]` |
| reliability.status_page | yes | - |
| security.scorecard | 6.7 | 7.1 |
| security.vulnerabilities | `{"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"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=cargo&package_name=rustc-ap-rustc_lexer&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Code Quality Tools)

| Capability | Checkstyle | Clippy |
|---|:--:|:--:|
| **Core** |  |  |
| Function | Static analyzer | Linter |
| Language scope | Single-language | Single-language |
| Implementation language | Java | Rust |
| **Capability** |  |  |
| Autofix | ✗ | - |
| **Config** |  |  |
| Config model | 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: Vioscale. Generated 2026-09-01T17:20:08.756Z. "-" = undocumented, not absent.*