# Biome vs mypy

**Leader by Vioscale score:** mypy

| Attribute | Biome | mypy |
|---|---|---|
| **Vioscale score** | 72.3 (38% (low)) | 80.4 (22% (low)) |
| activity.commits_last_30d | 100 | 44 |
| adoption.github_stars | 25,460 | 20,558 |
| adoption.package_downloads_weekly | 11,910,506 | 48,604,416 |
| deployment.options | `{"cloud":true}` | - |
| description.long | A fast formatter and linter for JavaScript, TypeScript, JSX, TSX, JSON, HTML, CSS, and GraphQL with 97% Prettier compatibility. | Mypy is an optional static type checker for Python that combines the benefits of dynamic and static typing. It enables compile-time type checking with no runtime overhead while allowing gradual migration from dynamic to static typing. |
| features.capabilities | `{"autofix":true,"function":"linter_formatter","open_source":"oss","pricing_model":"free","language_scope":"multi_language","editor_integration":true}` | `{"function":"type_checker","deployment":"cli_local","open_source":"oss","pricing_model":"free","language_scope":"single_language"}` |
| language.primary | Rust | Python |
| license.spdx | Apache-2.0 | - |
| platform.support | `{"cli":true,"web":true}` | - |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://biomejs.dev","retrievedAt":"2026-08-05T14:07:10.279Z"}` | `{"type":"open_source","sourceUrl":"https://mypy-lang.org","retrievedAt":"2026-08-05T14:11:24.368Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| release.cadence_days | 6 | - |

## Capabilities (Code Quality Tools)

| Capability | Biome | mypy |
|---|:--:|:--:|
| **Core** |  |  |
| Function | Linter + formatter | Type checker |
| Language scope | Multi-language | Single-language |
| Implementation language | - | - |
| **Capability** |  |  |
| Autofix | ✓ | - |
| **Config** |  |  |
| Config model | - | - |
| **Extensibility** |  |  |
| Custom rules | - | - |
| **Deployment** |  |  |
| Deployment | - | 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 2026-08-07T00:01:58.949Z. "-" = undocumented, not absent.*