# Black vs Prettier

**Leader by vioscaleAI score:** Prettier

| Attribute | Black | Prettier |
|---|---|---|
| **vioscaleAI score** | 73.9 (77% (high)) | 80.2 (78% (high)) |
| activity.commits_last_30d | 75 | 100 |
| adoption.dependent_repos | 105,588 | 1,703,312 |
| adoption.github_stars | 41,918 | 52,446 |
| adoption.package_downloads_weekly | 27,633,532 | 139,976,809 |
| content.faq | `[{"answer":"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. It is indexed under Code Quality Tools.","source":"https://black.readthedocs.io/en/stable/","question":"What is Black?","confidence":0.6},{"answer":"Black 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://black.readthedocs.io/en/stable/","question":"Is Black free to use?","confidence":0.6},{"answer":"Black supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://black.readthedocs.io/en/stable/","question":"What platforms does Black support?","confidence":0.6},{"answer":"Yes. Black can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://black.readthedocs.io/en/stable/","question":"Can Black be self-hosted?","confidence":0.6},{"answer":"We have confirmed 8 integrations for Black, including Neovim, conform.nvim, ALE, SublimeText, Pre-commit, Jupyter Notebooks, blacken-docs and blackdoc. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://black.readthedocs.io/en/stable/","question":"What does Black integrate with?","confidence":0.6},{"answer":"Yes. Black 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/psf/black","question":"Is Black open source?","confidence":0.95}]` | `[{"answer":"Prettier is a code formatting tool that parses source code and reprints it with its own consistent style rules. It integrates with editors and CI systems to format code automatically on save or in version control workflows, reducing style-related code review discussions. It is indexed under Code Quality Tools.","source":"https://prettier.io","question":"What is Prettier?","confidence":0.6},{"answer":"Prettier 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://prettier.io","question":"Is Prettier free to use?","confidence":0.6},{"answer":"Prettier supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://prettier.io","question":"What platforms does Prettier support?","confidence":0.6},{"answer":"Yes. Prettier can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://prettier.io","question":"Can Prettier be self-hosted?","confidence":0.6},{"answer":"We have confirmed 7 integrations for Prettier, including VS Code, WebStorm, Vim, Sublime Text, Emacs, Visual Studio and Nova. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://prettier.io","question":"What does Prettier integrate with?","confidence":0.6},{"answer":"Yes. Prettier 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/prettier/prettier","question":"Is Prettier open source?","confidence":0.99}]` |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A Python code formatter that automatically reformats entire files to enforce consistent styling. It produces minimal diffs to accelerate code review and ensures uniform appearance across projects. | An automatic formatting tool that parses code and reformats it according to opinionated style rules, adjusting wrapping based on line length constraints. |
| 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,"metrics":false,"function":"formatter","ci_gating":true,"deployment":"cli_local","incremental":true,"open_source":"oss","config_model":"config_file","custom_rules":false,"impl_language":"JavaScript","pricing_model":"free","language_scope":"multi_language","editor_integration":true}` |
| integrations.count | 5 | 19 |
| integrations.list | `[{"name":"Neovim"},{"name":"conform.nvim"},{"name":"ALE"},{"name":"SublimeText"},{"name":"Pre-commit"},{"name":"Jupyter Notebooks"},{"name":"blacken-docs"},{"name":"blackdoc"},{"name":"Vim","native":true},{"name":"Visual Studio Code","native":true,"category":"editor","direction":"bidirectional"},{"name":"GitHub Actions","native":true,"category":"ci","direction":"inbound"}]` | `[{"name":"VS Code"},{"name":"WebStorm"},{"name":"Vim"},{"name":"Sublime Text"},{"name":"Emacs"},{"name":"Visual Studio"},{"name":"Nova"},{"name":"Neovim"}]` |
| language.primary | Python | JavaScript |
| license.spdx | MIT | MIT |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"linux":true,"windows":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"free","summary":"Free and open source","freeTier":true,"sourceUrl":"https://black.readthedocs.io/en/stable/","retrievedAt":"2026-09-14T09:28:09.046Z"}` | `{"type":"open_source","summary":"Free and open source","freeTier":true,"sourceUrl":"https://prettier.io","retrievedAt":"2026-08-14T13:46:04.335Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | free | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 31 | 5 |
| release.history | `[{"url":"https://github.com/psf/black/releases/tag/26.10.1","date":"2026-10-10T04:11:33Z","type":"stable","version":"26.10.1"},{"url":"https://github.com/psf/black/releases/tag/26.10.0","date":"2026-10-04T16:50:23Z","type":"stable","version":"26.10.0"},{"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/prettier/prettier/releases/tag/3.9.10","date":"2026-10-10T08:36:47Z","type":"stable","version":"3.9.10"},{"url":"https://github.com/prettier/prettier/releases/tag/3.9.9","date":"2026-09-23T06:33:12Z","type":"stable","version":"3.9.9"},{"url":"https://github.com/prettier/prettier/releases/tag/3.9.8","date":"2026-09-17T21:55:32Z","type":"stable","version":"3.9.8"},{"url":"https://github.com/prettier/prettier/releases/tag/3.9.7","date":"2026-09-16T08:27:53Z","type":"stable","version":"3.9.7"},{"url":"https://github.com/prettier/prettier/releases/tag/3.9.6","date":"2026-07-21T05:52:55Z","type":"stable","version":"3.9.6"},{"url":"https://github.com/prettier/prettier/releases/tag/3.9.5","date":"2026-07-09T16:22:50Z","type":"stable","version":"3.9.5"},{"url":"https://github.com/prettier/prettier/releases/tag/3.9.4","date":"2026-06-30T01:21:45Z","type":"stable","version":"3.9.4"},{"url":"https://github.com/prettier/prettier/releases/tag/3.9.3","date":"2026-06-29T11:38:44Z","type":"stable","version":"3.9.3"},{"url":"https://github.com/prettier/prettier/releases/tag/3.9.1","date":"2026-06-27T23:06:22Z","type":"stable","version":"3.9.1"},{"url":"https://github.com/prettier/prettier/releases/tag/3.9.0","date":"2026-06-27T10:28:04Z","type":"stable","version":"3.9.0"},{"url":"https://github.com/prettier/prettier/releases/tag/3.8.5","date":"2026-06-26T13:00:46Z","type":"stable","version":"3.8.5"},{"url":"https://github.com/prettier/prettier/releases/tag/3.8.4","date":"2026-06-09T11:31:30Z","type":"stable","version":"3.8.4"},{"url":"https://github.com/prettier/prettier/releases/tag/3.8.3","date":"2026-04-15T01:00:35Z","type":"stable","version":"3.8.3"},{"url":"https://github.com/prettier/prettier/releases/tag/3.8.2","date":"2026-04-10T02:44:52Z","type":"stable","version":"3.8.2"},{"url":"https://github.com/prettier/prettier/releases/tag/3.8.1","date":"2026-01-21T17:50:23Z","type":"stable","version":"3.8.1"},{"url":"https://github.com/prettier/prettier/releases/tag/3.8.0","date":"2026-01-14T23:56:57Z","type":"stable","version":"3.8.0"},{"url":"https://github.com/prettier/prettier/releases/tag/3.7.4","date":"2025-12-03T04:37:09Z","type":"stable","version":"3.7.4"},{"url":"https://github.com/prettier/prettier/releases/tag/3.7.3","date":"2025-11-29T17:55:30Z","type":"stable","version":"3.7.3"},{"url":"https://github.com/prettier/prettier/releases/tag/3.7.2","date":"2025-11-28T20:58:56Z","type":"stable","version":"3.7.2"},{"url":"https://github.com/prettier/prettier/releases/tag/3.7.1","date":"2025-11-27T11:32:54Z","type":"stable","version":"3.7.1"}]` |
| security.disclosure_policy | yes | - |
| security.scorecard | 7.5 | 6 |
| 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":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=prettier&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Code Quality Tools)

| Capability | Black | Prettier |
|---|:--:|:--:|
| **Core** |  |  |
| Function | Formatter | Formatter |
| Language scope | Single-language | Multi-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: vioscaleAI. Generated 2026-10-16T20:04:04.422Z. "-" = undocumented, not absent.*