Coccinelle vs OpenRewrite

Coccinelle7.9Visit OOpenRewrite7.9Visit

Coccinelle #7 in Code Refactoring Tools 7.9/10 Free plan Free plan✓ 1 of 3 features Visit Coccinelle

vs

O OpenRewrite #8 in Code Refactoring Tools 7.9/10 Open source ✓ 2 of 3 features Visit OpenRewrite

• Coccinelle fits best

  C developers performing batch transformations

• OpenRewrite fits best

  Java ecosystem migrations and security fixes

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Side by side

Feature	Coccinelle 7.9/10 Visit ↗	OOpenRewrite 7.9/10 Visit ↗
At a glance
Editor score	7.9	7.9
Ranking	#7 in Code Refactoring Tools	#8 in Code Refactoring Tools
Best for	C developers performing batch transformations	Java ecosystem migrations and security fixes
Pricing model	Free	Free
Starting price	Free plan	Open source
Free plan	✓ (best)	Not checked yet
Free trial	—	—
Deployment	Self-hosted	Self-hosted
Support	Email, Community, Docs	Community, Docs
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features Coccinelle 1/3 · OpenRewrite 2/3
Batch refactoring	✓	✓
AI assistance	Not checked yet	Not checked yet
AST-based analysis	Not checked yet	✓ (best)
Specs
Supported languages	C, C++	Java, Kotlin, Groovy
Refactoring scope	Repository	Repository
Deployment	Desktop	Not checked yet
Our review
Pros	Semantic patches express structural matches and transformations Applies changes across directories, files, and multiple code sites Free, open-source workflow with diff and in-place transformation modes	Free open-source recipes for migrations, updates, and security fixes Maven and Gradle plugins support local execution Custom YAML recipes, composition, and multi-cycle execution
Cons	Primarily focused on C rather than broader language coverage C++ transformation support is preliminary and may be incomplete Local desktop distribution lacks a hosted SaaS workflow	Verified language coverage centers on Java, Kotlin, and Groovy Primarily operates through local or build-tool workflows Cross-repository orchestration belongs to the separate Moderne platform
Our verdict	Coccinelle is a program matching and transformation engine for systems code, aimed primarily at Linux kernel and systems-code developers. Its Semantic Patch Language (SmPL) lets developers describe structural matches and transformations,… Read the review →	OpenRewrite is an open-source ecosystem for automated source-code refactoring across repositories. It is aimed at development teams working on Java, Kotlin, and Groovy codebases that need framework migrations, dependency updates, security… Read the review →

Strengths and trade-offs

• Coccinelle — where it wins

  • Semantic patches express structural matches and transformations
  • Applies changes across directories, files, and multiple code sites
  • Free, open-source workflow with diff and in-place transformation modes

  Where it doesn't

  • Primarily focused on C rather than broader language coverage
  • C++ transformation support is preliminary and may be incomplete
  • Local desktop distribution lacks a hosted SaaS workflow

• OpenRewrite — where it wins

  • Free open-source recipes for migrations, updates, and security fixes
  • Maven and Gradle plugins support local execution
  • Custom YAML recipes, composition, and multi-cycle execution

  Where it doesn't

  • Verified language coverage centers on Java, Kotlin, and Groovy
  • Primarily operates through local or build-tool workflows
  • Cross-repository orchestration belongs to the separate Moderne platform

• Coccinelle7.9/10 · Free plan

  A focused, free tool for batch refactoring and bug fixing across C repositories.

  Visit CoccinelleFull verdict →
• OOpenRewrite7.9/10 · Open source

  A focused open-source toolkit for Java ecosystem migrations and security fixes.

  Visit OpenRewriteFull verdict →