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Head-to-head · Code Refactoring Tools

ast-grep vs DMS Software Reengineering Toolkit

  • Updated Oct 2026
  • Both researched from official sources
  • 3 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
DMS Software Reengineering Toolkit #4 in Code Refactoring Tools 8.3/10 Pricing on request ✓ 2 of 3 features Visit site

ast-grep leads on 0 checks, DMS Software Reengineering Toolkit on 0, and 3 are even. Who comes out ahead on the 3 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
  • Most featuresDMS Software Reengineering Toolkit · 2 of 3

ast-grep scores higher on our rubric for code refactoring tools: 8.7 against 8.3 out of 10; our editors rank them #2 and #4.

ast-grep is the better fit for developers needing free structural refactoring. DMS Software Reengineering Toolkit is the better fit for enterprise-scale, multi-language reengineering.

  • ast-grep fits best

    Developers needing free structural refactoring

  • DMS Software Reengineering Toolkit fits best

    Enterprise-scale, multi-language reengineering

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Side by side

Feature ast-grep 8.7/10 Visit ↗ DMS Software Reengineering Toolkit 8.3/10 Visit ↗
At a glance
Editor score 8.7 8.3
Ranking #2 in Code Refactoring Tools #4 in Code Refactoring Tools
Best for Developers needing free structural refactoring Enterprise-scale, multi-language reengineering
Pricing model Free Paid
Starting price Open source —
Free plan Not checked yet —
Free trial — —
Deployment Self-hosted Desktop
Platforms Windows, macOS, Linux Windows, Linux
Support Community, Docs Email, Phone, Docs
Built for Solo, Small business, Mid-market, Enterprise Mid-market, Enterprise
Features ast-grep 0/3 · DMS Software Reengineering Toolkit 2/3
Batch refactoring Not checked yet ✓ (best)
AI assistance Not checked yet Not checked yet
AST-based analysis Not checked yet ✓ (best)
Specs
Supported languages Not checked yet C, C++, C#, Java, Fortran, Pascal, Ada, COBOL, Natural, JCL, JavaScript, PHP, VB.NET, VBScript, VB6, Python, HTML, XML, SQL, PL/SQL, MATLAB M, Simulink, Verilog, VHDL, SystemC, and other extensible language domains
Refactoring scope Not checked yet Repository
Deployment Not checked yet Both
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
  • ASTs, semantic analysis, rewrite rules, and source generation
  • Processes thousands of files across many programming languages
  • Supports repository-wide batch refactoring on Windows and Linux
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
  • Quote-based pricing requires contacting sales
  • Licensed per development seat with annual maintenance
  • Requires custom engineering for specialized transformation workflows
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 →

DMS Software Reengineering Toolkit is a configurable environment for analyzing, modifying, generating, and transforming source code. It is designed for enterprises, integrators, government organizations, and teams managing complex legacy…

Read the review →
  1. ast-grepCode Refactoring Tools 8.7Open source
  2. DMS Software Reengineering ToolkitCode Refactoring Tools 8.3Pricing on request

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

  • DMS Software Reengineering Toolkit — where it wins

    • ASTs, semantic analysis, rewrite rules, and source generation
    • Processes thousands of files across many programming languages
    • Supports repository-wide batch refactoring on Windows and Linux

    Where it doesn't

    • Quote-based pricing requires contacting sales
    • Licensed per development seat with annual maintenance
    • Requires custom engineering for specialized transformation workflows
  • ast-grep8.7/10 · Open source

    A free, open-source choice for structural searches, codemods, and custom linting.

    Visit ast-grepFull verdict →
  • DMS Software Reengineering Toolkit8.3/10 · Pricing on request

    A deep, multi-language toolkit for enterprise reengineering and custom transformation work.

    Visit siteFull verdict →

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