ESLint vs Credo

ESLint9.4Visit Credo8.5Visit

Higher score ESLint #1 in Linters 9.4/10 Free plan Free plan✓ 4 of 4 features Visit ESLint

vs

Credo #7 in Linters 8.5/10 Free plan Free plan✓ 3 of 4 features Visit Credo

• ESLint fits best

  JavaScript projects needing an extensible standard

• Credo fits best

  Elixir teams checking style and complexity

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Side by side

Feature	ESLint 9.4/10 Visit ↗	Credo 8.5/10 Visit ↗
At a glance
Editor score	9.4	8.5
Ranking	#1 in Linters	#7 in Linters
Best for	JavaScript projects needing an extensible standard	Elixir teams checking style and complexity
Pricing model	Free	Free
Starting price	Free plan	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Self-hosted	Self-hosted
Support	Community, Docs	Docs
Integrations	12 integrations	7 integrations
Built for	Solo, Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features ESLint 4/4 · Credo 3/4
Autofix	✓ (best)	Not checked yet
Custom rules	✓	✓
Security rules	✓	✓
CI support	✓	✓
Specs
Languages supported	1	1
IDE support	Ide	Ide
Our review
Pros	Free, open-source static analysis with automatic fixing Custom rules, plugins, parsers, and configurations Integrates with editors, build tools, CI, and Node.js	Covers mistakes, style, refactoring, and complexity findings Supports strict mode, explanations, JSON, and SARIF output Offers custom checks, plugins, and broad editor integrations
Cons	Primary language scope is JavaScript and JSX Additional languages depend on plugins Autofix applies only to supported issues	Supports Elixir rather than multiple programming languages Installation and use center on Mix and the command line Teams may need another tool for broader language coverage
Our verdict	ESLint is an open-source static-analysis tool for identifying and fixing problems in JavaScript code. It analyzes code without executing it, reports rule violations, and can automatically fix many supported issues through the --fix… Read the review →	Credo is an open-source static code analysis tool for Elixir projects. It is aimed at developers and teams that want consistent style, maintainable code, and earlier feedback on common mistakes. Its checks cover naming, coding style,… Read the review →

Strengths and trade-offs

• ESLint — where it wins

  • Free, open-source static analysis with automatic fixing
  • Custom rules, plugins, parsers, and configurations
  • Integrates with editors, build tools, CI, and Node.js

  Where it doesn't

  • Primary language scope is JavaScript and JSX
  • Additional languages depend on plugins
  • Autofix applies only to supported issues

• Credo — where it wins

  • Covers mistakes, style, refactoring, and complexity findings
  • Supports strict mode, explanations, JSON, and SARIF output
  • Offers custom checks, plugins, and broad editor integrations

  Where it doesn't

  • Supports Elixir rather than multiple programming languages
  • Installation and use center on Mix and the command line
  • Teams may need another tool for broader language coverage

• ESLint9.4/10 · Free plan

  A free, extensible JavaScript linter with autofix, plugins, and broad developer-tool integrations.

  Visit ESLintFull verdict →
• Credo8.5/10 · Free plan

  A focused, free Elixir linter for style, complexity, refactoring, and custom checks.

  Visit CredoFull verdict →