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ESLint vs mypy: open-source code quality and static analysis tools compared

Metrics as of , from the GitHub or GitLab API of each repository. Refreshed monthly.

Summary

ESLint: Pluggable linter that finds and reports patterns in JavaScript code using configurable rules.

mypy: Static type checker for Python that checks PEP 484 type hints without running the program.

Both are listed under Code quality and static analysis. The table gives repository metrics from the GitHub API with their fetch date, then the documented facts used for every comparison in this category, each linked to the README or docs page it comes from. A cell reads "not documented" when the fact was not found in the project's documentation; that does not mean the feature is absent.

Side by side

ESLint and mypy: metrics and documented facts, in the fixed row order used for code quality and static analysis comparisons.
FactESLintmypy
Stars27,516120,6481
Forks5,18913,3101
Contributors1,24918691
Last release2026-09-1812026-08-151
Last commit2026-09-2212026-09-221
Commits in 90 days18911361
LicenseMIT1MIT1
Primary languageJavaScript1Python1
Statusactive1active1
Languages or files analysedECMAScript/JavaScript code; JSX parsing when enabled source: READMEPython programs with type hints source: README
Configuration formatJavaScript config file (eslint.config.js) source: READMEConfig file: mypy.ini, .mypy.ini, pyproject.toml ([tool.mypy]) or setup.cfg ([mypy]) source: Docs: The mypy configuration file
CI integrationIntegrations page lists Mega-Linter, a community linters aggregator for CI that embeds ESLint source: Docs: IntegrationsDocs describe running mypy in a CI system, with an example CI script source: Docs: Using mypy with an existing codebase
Report formatshtml, json, json-with-metadata, stylish; third-party formatters source: Docs: Formatters ReferenceJUnit XML; JSON output; HTML, XML, Cobertura XML and text type checking coverage reports source: Docs: The mypy command line
Install methodnpm (npm init @eslint/config@latest) source: READMEpip (python3 -m pip install -U mypy) source: README

1 Fetched from the GitHub or GitLab API on . Hover a value for its own date.

When each fits

Written from each project's documented scope, not from preference. Neither tool is ranked.

ESLint

Fits projects that lint ECMAScript/JavaScript code; its README describes a design in which every rule is a plugin and more rules can be added at runtime. source: README

mypy

Fits projects that add PEP 484 type hints to Python programs; its README describes gradual typing, where hints are added over time with a fallback to dynamic typing. source: README

More on these tools

Sources

  1. GitHub REST API: repository, read
  2. GitHub REST API: repository, read
  3. GitHub REST API: contributors, read
  4. GitHub REST API: contributors, read
  5. GitHub REST API: latest release, read
  6. GitHub REST API: tags, read
  7. GitHub REST API: commits, read
  8. GitHub REST API: commits, read
  9. README, read
  10. README, read
  11. Docs: The mypy configuration file, read
  12. Docs: Integrations, read
  13. Docs: Using mypy with an existing codebase, read
  14. Docs: Formatters Reference, read
  15. Docs: The mypy command line, read

Documented facts collected 2026-09-22. See the methodology for how metrics and facts are gathered.