vioscaleAI
Comparison

ESLint vs RuboCop

On the evidence we track, ESLint leads this comparison with a composite score of 76/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

ESLint full profile →RuboCop full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★ESLint76
RuboCop64
Score
vioscaleAI score
ESLint76 / 100high · 78%
RuboCop64 / 100medium · 50%
Pricing
Free tier
ESLint✓
RuboCop✓
Model
Price level
ESLintfree
RuboCopfree
Transparent
ESLint–
RuboCop✓
Integrations
Count
ESLint2
RuboCop14
Security
Scorecard
ESLint6.6
RuboCop5.1
Vulnerabilities
Adoption
Dependent repos
ESLint1,569,244
RuboCop115,529
Github stars
ESLint27,559
RuboCop12,913
Package downloads weekly
ESLint158,743,826
RuboCop–
Activity
Commits last 30d
ESLint44
RuboCop100
Release
Cadence days
ESLint13
RuboCop16
History
ESLint20 items
RuboCop20 items
License
Spdx
ESLintMIT
RuboCopMIT
Language
Primary
ESLintJavaScript
RuboCopRuby
Content
Faq
ESLint5 items
RuboCop5 items

Capabilities

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

Core
Function
ESLintLinter + formatter
RuboCopLinter + formatter
Language scope
ESLintSingle-language
RuboCopSingle-language
Implementation language
ESLintJavaScript
RuboCopRuby
Capability
Autofix
ESLint✓
RuboCop✓
Config
Config model
ESLintConfig file
RuboCopConfig file
Extensibility
Custom rules
ESLint✓
RuboCop✓
Deployment
Deployment
ESLintCLI-local
RuboCopCLI-local
Delivery
Editor integration
ESLint✓
RuboCop✓
CI / VCS gating
ESLint✓
RuboCop✓
Insight
Code metrics
ESLint-
RuboCop✓
Performance
Incremental / monorepo aware
ESLint-
RuboCop-
Licensing
Open-source
ESLintOSS
RuboCopOSS
Commercial
Pricing model
ESLintFree
RuboCopFree

What each one is

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

ESLint

Leader

Open-source linter that uses abstract syntax tree analysis to detect JavaScript code issues and apply syntax-aware fixes, with extensive customization through custom rules and parsers.

Independently observed

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

Pricing

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

ESLint

Leader
Open sourceFree tier

Free open source

  • Open SourceFree
    • Find issues in JavaScript code
    • Automatically fix problems
    • Custom parsers
    • Custom rules
    • Text editor integration
    • +1 more
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
ESLint✓
RuboCop✓
Deployment
Self-hosted
ESLint✓
RuboCop✓

Integrations

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

ESLint

Leader
2 total
  • eslint-plugin-react
  • eslint-plugin-unicorn
Independently observed

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
Still deciding?

ESLint or RuboCop: 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.