# Black vs ESLint

| Attribute | Black | ESLint |
|---|---|---|
| **Vioscale score** | 72.7 (78% (high)) | 73.6 (79% (high)) |
| activity.commits_last_30d | 29 | 50 |
| adoption.dependent_repos | 105,588 | 1,569,244 |
| adoption.github_stars | 41,816 | 27,484 |
| adoption.package_downloads_weekly | 39,005,228 | 160,098,819 |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | An opinionated Python code formatter that automatically reformats code according to a standardized style. It produces minimal diffs for cleaner code review and reduces developer cognitive load by removing formatting decisions, allowing focus on code logic. | An open-source linter and fixer for JavaScript and JSX that runs locally in editors and CI pipelines. It uses AST analysis to catch problems and can automatically fix many issues, with full support for custom rules and extensibility. |
| features.capabilities | `{"autofix":true,"metrics":false,"function":"formatter","ci_gating":true,"deployment":"both","incremental":false,"open_source":"oss","config_model":"zero_config","custom_rules":false,"impl_language":"Python","pricing_model":"free","language_scope":"single_language","editor_integration":true}` | `{"autofix":true,"function":"linter_formatter","ci_gating":true,"deployment":"cli_local","open_source":"oss","config_model":"config_file","custom_rules":true,"impl_language":"JavaScript","pricing_model":"free","language_scope":"single_language","editor_integration":true}` |
| integrations.count | 8 | 2 |
| integrations.list | `[{"name":"Neovim"},{"name":"conform.nvim"},{"name":"ALE"},{"name":"SublimeText"},{"name":"Pre-commit"},{"name":"Jupyter Notebooks"},{"name":"blacken-docs"},{"name":"blackdoc"}]` | `[{"name":"eslint-plugin-react"},{"name":"eslint-plugin-unicorn"}]` |
| language.primary | Python | JavaScript |
| license.spdx | MIT | MIT |
| platform.support | `{"cli":true}` | `{"cli":true}` |
| pricing | `{"type":"open_source","summary":"Free and open source (MIT licensed)","freeTier":true,"sourceUrl":"https://black.readthedocs.io/en/stable/","retrievedAt":"2026-08-14T13:47:36.307Z"}` | `{"type":"open_source","plans":[{"free":true,"name":"Open Source","features":["Find issues in JavaScript code","Automatically fix problems","Custom parsers","Custom rules","Text editor integration","CI pipeline integration"],"description":"Free open source linter","contactSales":false}],"summary":"Free open source","freeTier":true,"sourceUrl":"https://eslint.org","retrievedAt":"2026-08-05T14:08:29.561Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 31 | 13 |
| release.history | `[{"url":"https://github.com/psf/black/releases/tag/26.5.1","date":"2026-05-18T16:52:38Z","type":"stable","version":"26.5.1"},{"url":"https://github.com/psf/black/releases/tag/26.5.0","date":"2026-05-16T17:56:23Z","type":"stable","version":"26.5.0"},{"url":"https://github.com/psf/black/releases/tag/26.3.1","date":"2026-03-12T03:35:15Z","type":"stable","version":"26.3.1"},{"url":"https://github.com/psf/black/releases/tag/26.3.0","date":"2026-03-06T17:41:48Z","type":"stable","version":"26.3.0"},{"url":"https://github.com/psf/black/releases/tag/26.1.0","date":"2026-01-18T04:49:25Z","type":"stable","version":"26.1.0"},{"url":"https://github.com/psf/black/releases/tag/26.1a1","date":"2025-12-08T01:46:21Z","type":"prerelease","version":"26.1a1"},{"url":"https://github.com/psf/black/releases/tag/25.12.0","date":"2025-12-08T01:40:32Z","type":"stable","version":"25.12.0"},{"url":"https://github.com/psf/black/releases/tag/25.11.0","date":"2025-11-10T01:53:31Z","type":"stable","version":"25.11.0"},{"url":"https://github.com/psf/black/releases/tag/25.9.0","date":"2025-09-19T00:27:15Z","type":"stable","version":"25.9.0"},{"url":"https://github.com/psf/black/releases/tag/25.1.0","date":"2025-01-29T04:15:11Z","type":"stable","version":"25.1.0"},{"url":"https://github.com/psf/black/releases/tag/24.10.0","date":"2024-10-07T19:20:06Z","type":"stable","version":"24.10.0"},{"url":"https://github.com/psf/black/releases/tag/24.8.0","date":"2024-08-02T17:42:53Z","type":"stable","version":"24.8.0"},{"url":"https://github.com/psf/black/releases/tag/24.4.2","date":"2024-04-26T00:31:27Z","type":"stable","version":"24.4.2"},{"url":"https://github.com/psf/black/releases/tag/24.4.1","date":"2024-04-24T15:17:30Z","type":"stable","version":"24.4.1"},{"url":"https://github.com/psf/black/releases/tag/24.4.0","date":"2024-04-12T20:13:48Z","type":"stable","version":"24.4.0"},{"url":"https://github.com/psf/black/releases/tag/24.3.0","date":"2024-03-15T19:35:14Z","type":"stable","version":"24.3.0"},{"url":"https://github.com/psf/black/releases/tag/24.2.0","date":"2024-02-12T20:20:40Z","type":"stable","version":"24.2.0"},{"url":"https://github.com/psf/black/releases/tag/24.1.1","date":"2024-01-28T05:28:09Z","type":"stable","version":"24.1.1"},{"url":"https://github.com/psf/black/releases/tag/24.1.0","date":"2024-01-26T05:11:50Z","type":"stable","version":"24.1.0"},{"url":"https://github.com/psf/black/releases/tag/23.12.1","date":"2023-12-22T23:05:40Z","type":"stable","version":"23.12.1"}]` | `[{"url":"https://github.com/eslint/eslint/releases/tag/v10.9.1","date":"2026-08-24T18:18:59Z","type":"stable","version":"v10.9.1"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.9.0","date":"2026-08-21T13:05:50Z","type":"stable","version":"v10.9.0"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.8.1","date":"2026-08-07T20:16:24Z","type":"stable","version":"v10.8.1"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.8.0","date":"2026-07-24T20:15:28Z","type":"stable","version":"v10.8.0"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.7.0","date":"2026-07-10T21:22:56Z","type":"stable","version":"v10.7.0"},{"url":"https://github.com/eslint/eslint/releases/tag/v9.39.5","date":"2026-07-10T20:41:58Z","type":"stable","version":"v9.39.5"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.6.0","date":"2026-06-26T20:09:26Z","type":"stable","version":"v10.6.0"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.5.0","date":"2026-06-12T17:54:47Z","type":"stable","version":"v10.5.0"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.4.1","date":"2026-05-29T20:32:39Z","type":"stable","version":"v10.4.1"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.4.0","date":"2026-05-15T14:11:22Z","type":"stable","version":"v10.4.0"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.3.0","date":"2026-05-01T15:39:48Z","type":"stable","version":"v10.3.0"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.2.1","date":"2026-04-17T20:17:51Z","type":"stable","version":"v10.2.1"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.2.0","date":"2026-04-03T20:36:28Z","type":"stable","version":"v10.2.0"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.1.0","date":"2026-03-20T15:31:47Z","type":"stable","version":"v10.1.0"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.0.3","date":"2026-03-06T22:53:26Z","type":"stable","version":"v10.0.3"},{"url":"https://github.com/eslint/eslint/releases/tag/v9.39.4","date":"2026-03-06T21:46:54Z","type":"stable","version":"v9.39.4"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.0.2","date":"2026-02-23T21:43:46Z","type":"stable","version":"v10.0.2"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.0.1","date":"2026-02-20T15:15:18Z","type":"stable","version":"v10.0.1"},{"url":"https://github.com/eslint/eslint/releases/tag/v9.39.3","date":"2026-02-20T13:52:17Z","type":"stable","version":"v9.39.3"},{"url":"https://github.com/eslint/eslint/releases/tag/v10.0.0","date":"2026-02-06T22:30:54Z","type":"stable","version":"v10.0.0"}]` |
| security.disclosure_policy | yes | - |
| security.scorecard | 7.7 | 6.3 |
| security.vulnerabilities | `{"count":2,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=black&per_page=100","last_12m":1,"max_severity":"HIGH"}` | `{"count":2,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=eslint&per_page=100","last_12m":1,"max_severity":"MODERATE"}` |

## Capabilities (Code Quality Tools)

| Capability | Black | ESLint |
|---|:--:|:--:|
| **Core** |  |  |
| Function | Formatter | Linter + formatter |
| Language scope | Single-language | Single-language |
| Implementation language | Python | JavaScript |
| **Capability** |  |  |
| Autofix | ✓ | ✓ |
| **Config** |  |  |
| Config model | Zero-config | Config file |
| **Extensibility** |  |  |
| Custom rules | ✗ | ✓ |
| **Deployment** |  |  |
| Deployment | Both | 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 2026-09-01T17:06:32.280Z. "-" = undocumented, not absent.*