Coccinelle vs CodeRush

Coccinelle is a free program matching and transformation engine for working with C code. It uses SmPL to describe code patterns and the transformations to apply when matches are found. A single semantic patch can change code at many sites across hundreds of files while allowing for differences in spacing, variable names, irrelevant code, and coding style. The project describes uses including automating collateral changes after library API evolution and finding and fixing bugs in systems code. Coccinelle semantic patches and bug fixes have been integrated into the official Linux tree, and semantic patches are available in the Linux scripts directory for use with coccicheck. It supports C and C++, with C++ mode invoked using --c++; the project says its C++ support is still being extended, including for high performance computing. The download page lists version 1.3.3, dated September 2, 2026, with source code and precompiled spatch builds. It is available for Linux and macOS as desktop software. Source builds require OCaml, with Python and Menhir needed in specified cases.

CodeRush is a Visual Studio extension for code generation, refactoring, navigation, formatting, debugging, testing, and code coverage. It includes more than 100 refactorings and intelligent code providers, with refactoring support described for C#, Visual Basic, and XAML. Its test runner supports NUnit, MSTest, xUnit, and MSpec without configuration, plus .NET Core, .NET Framework, and multi-target projects. Code style can be set for an individual developer, a solution, or a team, and cleanup can run when documents are saved. The listed IDEs are Visual Studio 2026 and Visual Studio 2022. CodeRush is available free for commercial use, with the same features and updates across free and paid subscriptions. A paid plan is listed from $249.99/user/yr, and a 30-day trial is listed. AI features require an OpenAI API key; voice input requires an Azure Cognitive Services Speech API key. Technical support is available to owners of qualifying DevExpress subscriptions; free users can search the support database.