Comparison

Black vs Ruff

No clear leader: Black (73.9) and Ruff (72.5) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
Black74
Ruff73
Score
vioscaleAI score
Black74 / 100high · 77%
Ruff73 / 100medium · 68%
Pricing
Free tier
Black✓
Ruff–
Model
Price level
Blackfree
Ruff–
Transparent
Black✓
Ruff–
Integrations
Count
Black5
Ruff6
Adoption
Dependent repos
Black105,588
Ruff5,870
Github stars
Black41,918
Ruff49,914
Package downloads weekly
Activity
Commits last 30d
Black75
Ruff100
Release
Cadence days
Black31
Ruff7
History
License
Spdx
BlackMIT
RuffMIT
Language
Primary
BlackPython
RuffRust
Market
Content
Faq

Capabilities

Feature-by-feature on the axes that matter for code quality tools. “-” means undocumented, not absent.

Core
Function
BlackFormatter
RuffLinter
Language scope
BlackSingle-language
RuffSingle-language
Implementation language
BlackPython
RuffRust
Capability
Autofix
Black✓
Ruff✓
Config
Config model
BlackZero-config
Ruff-
Extensibility
Custom rules
Black✗
Ruff-
Deployment
Deployment
BlackBoth
RuffCLI-local
Delivery
Editor integration
Black✓
Ruff✓
CI / VCS gating
Black✓
Ruff-
Insight
Code metrics
Black✗
Ruff-
Performance
Incremental / monorepo aware
Black✗
Ruff✓
Licensing
Open-source
BlackOSS
RuffOSS
Commercial
Pricing model
BlackFree
RuffFree

What each one is

The product in its own terms, so the numbers below have context.

Black

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.

Independently observed

Ruff

A tool for analyzing and formatting Python code, designed to be fast and efficient through Rust implementation, with support across multiple platforms.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Black

FreeFree tier

Free and open source

as of verify ↗

Ruff

Pricing not documented yet.

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
macOS
Black✗
Ruff✓
Windows
Black✓
Ruff✓
Linux
Black✓
Ruff✓
CLI
Black✓
Ruff✓
Deployment
Self-hosted
Black✓
Ruff✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (1)
  • Visual Studio Code

Black

11 total - 10 not shared
  • Neovim
  • conform.nvim
  • ALE
  • SublimeText
  • Pre-commit
  • Jupyter Notebooks
  • blacken-docs
  • blackdoc
  • Vim
  • GitHub Actions
Independently observed

Ruff

7 total - 6 not shared
  • Flake8
  • isort
  • Autoflake
  • Pyflakes
  • pycodestyle
  • Pylint
Independently observed
Still deciding?

Black or Ruff: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.