# flake8 vs mypy

**Leader by vioscaleAI score:** mypy

| Attribute | flake8 | mypy |
|---|---|---|
| **vioscaleAI score** | 64 (66% (medium)) | 69.4 (66% (medium)) |
| activity.commits_last_30d | 21 | 100 |
| adoption.dependent_repos | 153,063 | 52,771 |
| adoption.github_stars | 3,828 | 20,682 |
| adoption.package_downloads_weekly | 9,519,717 | 42,892,033 |
| content.faq | `[{"answer":"flake8 is an open-source Python linter that combines multiple style-checking tools to verify code compliance with PEP 8 and detect errors. It uses a plugin architecture for extensibility and is commonly integrated into development workflows and CI/CD pipelines. It is indexed under Code Quality Tools.","source":"https://flake8.pycqa.org/","question":"What is flake8?","confidence":0.6},{"answer":"flake8 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://flake8.pycqa.org/","question":"Is flake8 free to use?","confidence":0.6},{"answer":"flake8 supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://flake8.pycqa.org/","question":"What platforms does flake8 support?","confidence":0.6},{"answer":"Yes. flake8 can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://flake8.pycqa.org/","question":"Can flake8 be self-hosted?","confidence":0.6},{"answer":"We have confirmed 3 integrations for flake8, including pycodestyle, pyflakes and mccabe. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://flake8.pycqa.org/","question":"What does flake8 integrate with?","confidence":0.6},{"answer":"Yes. flake8 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://pypi.org/pypi/flake8/json","question":"Is flake8 open source?","confidence":0.9}]` | `[{"answer":"A type analysis tool for Python that enables code to transition from pure dynamic typing to statically-typed code through annotations, with error detection at check time. Code runs with negligible performance impact and developers can incrementally adopt static types in existing projects. It is indexed under Code Quality Tools.","source":"https://mypy-lang.org","question":"What is mypy?","confidence":0.6},{"answer":"mypy is open source, so it can be self-hosted and used at no licence cost. Pricing changes often, so verify at source before relying on it.","source":"https://mypy-lang.org","question":"Is mypy free to use?","confidence":0.6},{"answer":"mypy supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://mypy-lang.org","question":"What platforms does mypy support?","confidence":0.6}]` |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | flake8 is an open-source Python linter that combines multiple style-checking tools to verify code compliance with PEP 8 and detect errors. It uses a plugin architecture for extensibility and is commonly integrated into development workflows and CI/CD pipelines. | A static type checker that analyzes Python code to catch type errors before runtime. Supports gradual typing, allowing you to mix static and dynamic typing and incrementally add type hints to existing codebases. |
| features.capabilities | `{"autofix":false,"metrics":true,"function":"linter","ci_gating":true,"deployment":"cli_local","open_source":"oss","config_model":"config_file","custom_rules":true,"impl_language":"Python","pricing_model":"free","language_scope":"single_language","editor_integration":true}` | `{"autofix":false,"metrics":false,"function":"type_checker","ci_gating":true,"deployment":"cli_local","incremental":true,"open_source":"oss","custom_rules":false,"impl_language":"Python","pricing_model":"free","language_scope":"single_language","editor_integration":true}` |
| integrations.count | 3 | 1 |
| integrations.list | `[{"name":"pycodestyle"},{"name":"pyflakes"},{"name":"mccabe"},{"name":"pre-commit","native":true,"category":"ci","direction":"inbound"}]` | `[{"name":"VS Code","native":true}]` |
| language.primary | Python | Python |
| license.spdx | MIT | - |
| platform.support | `{"cli":true}` | `{"cli":true}` |
| pricing | `{"type":"free","freeTier":true,"sourceUrl":"https://flake8.pycqa.org/","retrievedAt":"2026-09-10T16:03:57.147Z"}` | `{"type":"open_source","sourceUrl":"https://mypy-lang.org","retrievedAt":"2026-08-14T13:45:01.127Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | free | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| security.scorecard | 5 | 6.8 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=flake8&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=mypy&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Code Quality Tools)

| Capability | flake8 | mypy |
|---|:--:|:--:|
| **Core** |  |  |
| Function | Linter | Type checker |
| Language scope | Single-language | Single-language |
| Implementation language | Python | Python |
| **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: vioscaleAI. Generated 2026-10-16T19:22:05.741Z. "-" = undocumented, not absent.*