# Roslyn 11 Hacker News commenters recommended Roslyn and 1 criticized it, November 2025 to November 2026. It was recommended in 8 of 13 months. It meets the Hacker Approved badge rule. **Verdict:** Free .NET compiler platform giving developers parsing, semantic analysis and code generation through C# APIs, widely used for code analysis tooling. ## Why people recommend it - Strong typing and semantic APIs (2 comments): "With Roslyn APIs, strong typing, structured namespaces, and compiler level semantic information" ([source](https://news.ycombinator.com/item?id=49904722)) "Roslyn was designed from day one for IDE scenarios." ([source](https://news.ycombinator.com/item?id=46725630)) - Custom static and code analysis (2 comments): "My VS copilot already writes one-off scripts that use Roslyn to analyze code." ([source](https://news.ycombinator.com/item?id=49669491)) "Roselyn compiler infrastructure which allows for custom static analysis" ([source](https://news.ycombinator.com/item?id=46542702)) - Fast, precise source parsing (2 comments): "mechanically and precisely parse the source and safely perform the substitution" ([source](https://news.ycombinator.com/item?id=48694269)) "we aim for microsecond (not millisecond) parsing" ([source](https://news.ycombinator.com/item?id=46725799)) - Useful for agentic AI coding (2 comments): "My VS copilot already writes one-off scripts that use Roslyn to analyze code." ([source](https://news.ycombinator.com/item?id=49669491)) "Yes, roslyn is like a super-power for agentic coding." ([source](https://news.ycombinator.com/item?id=48106365)) ## Alternatives hackers recommend - [LLVM](https://hackerapproved.com/p/llvm.md): 119 recommend - [QBE](https://hackerapproved.com/p/qbe.md): 16 recommend - [EDG C++ front-end](https://hackerapproved.com/p/edg-c-plus-plus-front-end.md): 15 recommend - [MLIR](https://hackerapproved.com/p/mlir.md): 10 recommend - [Cranelift](https://hackerapproved.com/p/cranelift.md): 10 recommend ## Cite as Hacker Approved, "Roslyn", https://hackerapproved.com/p/roslyn/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).