Comparison

RuboCop vs Ruff

On the evidence we track, Ruff leads this comparison with a composite score of 73/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
RuboCop64
★Ruff73
Score
vioscaleAI score
RuboCop64 / 100medium · 50%
Ruff73 / 100medium · 68%
Pricing
Free tier
RuboCop✓
Ruff–
Model
Price level
RuboCopfree
Ruff–
Transparent
RuboCop✓
Ruff–
Integrations
Count
RuboCop14
Ruff6
Adoption
Dependent repos
RuboCop115,529
Ruff5,870
Github stars
RuboCop12,913
Ruff49,914
Package downloads weekly
RuboCop–
Activity
Commits last 30d
RuboCop100
Ruff100
Release
Cadence days
RuboCop16
Ruff7
History
RuboCop20 items
License
Spdx
RuboCopMIT
RuffMIT
Language
Primary
RuboCopRuby
RuffRust
Market
Content
Faq
RuboCop5 items

Capabilities

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

Core
Function
RuboCopLinter + formatter
RuffLinter
Language scope
RuboCopSingle-language
RuffSingle-language
Implementation language
RuboCopRuby
RuffRust
Capability
Autofix
RuboCop✓
Ruff✓
Config
Config model
RuboCopConfig file
Ruff-
Extensibility
Custom rules
RuboCop✓
Ruff-
Deployment
Deployment
RuboCopCLI-local
RuffCLI-local
Delivery
Editor integration
RuboCop✓
Ruff✓
CI / VCS gating
RuboCop✓
Ruff-
Insight
Code metrics
RuboCop✓
Ruff-
Performance
Incremental / monorepo aware
RuboCop-
Ruff✓
Licensing
Open-source
RuboCopOSS
RuffOSS
Commercial
Pricing model
RuboCopFree
RuffFree

What each one is

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

RuboCop

An open-source linter and formatter for Ruby that enforces the community style guide, identifies potential bugs, and can automatically correct many issues.

Independently observed

Ruff

Leader

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.

RuboCop

Open sourceFree tier

Free and open source

as of verify ↗

Ruff

Leader

Pricing not documented yet.

Platform & deployment

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

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

Integrations

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

RuboCop

19 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
  • VS Code
  • RubyMine
  • Emacs
  • Neovim
  • Zed
Independently observed

Ruff

Leader
7 total
  • Flake8
  • isort
  • Autoflake
  • Pyflakes
  • pycodestyle
  • Pylint
  • Visual Studio Code
Independently observed
Still deciding?

RuboCop 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.