Comparison

Black vs RuboCop

No clear leader: Black (72.7) and RuboCop (69.7) 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 formatsJSONMarkdownGraphQLor send Accept: application/json
Black73
RuboCop70
Score
Vioscale score
Black73 / 100high · 78%
RuboCop70 / 100medium · 53%
Pricing
Free tier
Black
RuboCop
Model
Price level
Blackfree
RuboCopfree
Transparent
Black
RuboCop
Integrations
Count
Black8
RuboCop14
Adoption
Dependent repos
Black105,588
RuboCop115,529
Github stars
Black41,816
RuboCop12,899
Package downloads weekly
RuboCop
Activity
Commits last 30d
Black29
RuboCop100
Release
Cadence days
Black31
RuboCop16
History
RuboCop20 items
License
Spdx
BlackMIT
RuboCopMIT
Language
Primary
BlackPython
RuboCopRuby

Capabilities

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

Core
Function
BlackFormatter
RuboCopLinter + formatter
Language scope
BlackSingle-language
RuboCopSingle-language
Implementation language
BlackPython
RuboCopRuby
Capability
Autofix
Black
RuboCop
Config
Config model
BlackZero-config
RuboCopConfig file
Extensibility
Custom rules
Black
RuboCop
Deployment
Deployment
BlackBoth
RuboCopCLI-local
Delivery
Editor integration
Black
RuboCop
CI / VCS gating
Black
RuboCop-
Insight
Code metrics
Black
RuboCop-
Performance
Incremental / monorepo aware
Black
RuboCop-
Licensing
Open-source
BlackOSS
RuboCopOSS
Commercial
Pricing model
BlackFree
RuboCopFree

What each one is

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

Black

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.

Independently observed

RuboCop

RuboCop is an open-source Ruby linter and formatter that enforces code style based on the Ruby community style guide. It detects code quality issues and can automatically fix many of them, with extensive configuration options and extensibility through community plugins.

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

Open sourceFree tier

Free and open source (MIT licensed)

as of verify ↗

RuboCop

Open sourceFree tier

Free and open source

as of verify ↗

Platform & deployment

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

Platforms
CLI
Black
RuboCop
Deployment
Self-hosted
Black
RuboCop

Integrations

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

Black

8 total
  • Neovim
  • conform.nvim
  • ALE
  • SublimeText
  • Pre-commit
  • Jupyter Notebooks
  • blacken-docs
  • blackdoc
Independently observed

RuboCop

14 total
  • rubocop-performance
  • rubocop-rails
  • rubocop-rspec
  • rubocop-minitest
  • rubocop-rake
  • rubocop-sequel
  • rubocop-thread_safety
  • rubocop-capybara
  • rubocop-factory_bot
  • rubocop-rspec_rails
  • rubocop-i18n
  • Eglot
  • Helix
  • Flycheck
Independently observed

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