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Head-to-head · Code Refactoring Tools

ast-grep vs Coccinelle

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score ast-grep #2 in Code Refactoring Tools 8.7/10 Open source ✓ 0 of 3 features Visit ast-grep
Coccinelle #7 in Code Refactoring Tools 7.9/10 Free plan Free plan✓ 1 of 3 features Visit Coccinelle

ast-grep leads on 0 checks, Coccinelle on 0, and 2 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreast-grep · 8.7/10
  • Free planonly Coccinelle
  • Most featuresCoccinelle · 1 of 3

ast-grep scores higher on our rubric for code refactoring tools: 8.7 against 7.9 out of 10; our editors rank them #2 and #7.

ast-grep is the better fit for developers needing free structural refactoring. Coccinelle is the better fit for C developers performing batch transformations.

  • ast-grep fits best

    Developers needing free structural refactoring

  • Coccinelle fits best

    C developers performing batch transformations

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Side by side

Feature ast-grep 8.7/10 Visit ↗ Coccinelle 7.9/10 Visit ↗
At a glance
Editor score 8.7 7.9
Ranking #2 in Code Refactoring Tools #7 in Code Refactoring Tools
Best for Developers needing free structural refactoring C developers performing batch transformations
Pricing model Free Free
Starting price Open source Free plan
Free plan Not checked yet ✓ (best)
Free trial — —
Deployment Self-hosted Self-hosted
Platforms Windows, macOS, Linux Linux, macOS
Support Community, Docs Email, Community, Docs
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features ast-grep 0/3 · Coccinelle 1/3
Batch refactoring Not checked yet ✓ (best)
AI assistance Not checked yet Not checked yet
AST-based analysis Not checked yet Not checked yet
Specs
Supported languages Not checked yet C, C++
Refactoring scope Not checked yet Repository
Deployment Not checked yet Desktop
Our review
Pros
  • AST-based search and rewriting support large-scale codemods
  • Custom YAML lint rules and language-server fixes
  • Works across Windows, macOS, and Linux
  • 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
Cons
  • Local installation requires teams to manage their own deployment
  • AST pattern matching differs from plain-text search workflows
  • Editor integrations focus on VS Code, Neovim, and Emacs
  • 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
Our verdict

ast-grep is an open-source command-line tool for developers who need structural code search, linting, rewriting, and refactoring. Instead of matching only plain text, it works with abstract syntax tree patterns, making it suitable for…

Read the review →

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 →
  1. ast-grepCode Refactoring Tools 8.7Open source
  2. CoccinelleCode Refactoring Tools 7.9Free plan

Strengths and trade-offs

  • ast-grep — where it wins

    • AST-based search and rewriting support large-scale codemods
    • Custom YAML lint rules and language-server fixes
    • Works across Windows, macOS, and Linux

    Where it doesn't

    • Local installation requires teams to manage their own deployment
    • AST pattern matching differs from plain-text search workflows
    • Editor integrations focus on VS Code, Neovim, and Emacs

  • 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

More comparisons

All code refactoring tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update