Roslyn
Static code analysis tools
DevSecOps software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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What is Roslyn
Roslyn is the .NET Compiler Platform that provides C# and Visual Basic compilers with APIs for parsing, analyzing, and transforming source code. Development teams and tool builders use it to implement static code analysis, refactorings, and code fixes in IDEs and CI workflows. It is commonly consumed through Visual Studio features and as a foundation for analyzers distributed via NuGet. Roslyn focuses on language-aware analysis and code generation rather than being a standalone DevSecOps platform.
Deep C# and VB semantics
Roslyn exposes full-fidelity syntax trees and semantic models for C# and Visual Basic. This enables analyzers to reason about symbols, types, and bindings rather than relying on pattern matching. It supports precise diagnostics and automated code fixes that integrate naturally with developer workflows.
First-class IDE integration
Roslyn underpins many Visual Studio and .NET SDK experiences, including live diagnostics, refactorings, and code style enforcement. Analyzers can run in the editor and during builds, helping teams catch issues early. This tight integration reduces friction compared with tools that require separate scanning steps.
Extensible analyzer ecosystem
Roslyn supports custom analyzers and code fix providers that teams can package and distribute via NuGet. Organizations can encode internal standards, security rules, and architectural constraints as compile-time checks. The same analyzer packages can run locally and in CI, improving consistency across environments.
Not a turnkey SAST platform
Roslyn is a compiler platform and API surface, not an end-to-end static analysis product with centralized dashboards, policy management, and reporting. Teams typically need to assemble analyzers, configure rules, and integrate results into their DevSecOps toolchain. This can increase setup and governance effort compared with dedicated platforms.
Primarily .NET language scope
Roslyn targets C# and Visual Basic; it does not natively analyze non-.NET languages. Organizations with polyglot codebases often need additional tools to cover other languages and frameworks. This can lead to fragmented rule management and reporting across stacks.
Rule quality varies by analyzer
Roslyn provides the framework, but detection depth depends on the specific analyzer packages used. Some analyzers focus on style and maintainability rather than security, and false positives/negatives vary by rule set. Achieving strong security coverage may require selecting, tuning, and maintaining multiple analyzers over time.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Free / Open-source | $0 (no subscription) | Roslyn is the .NET Compiler Platform: open-source C# and Visual Basic compilers and code-analysis APIs. Distributed under the MIT license on the official dotnet/roslyn GitHub repository; available via NuGet and as the .NET Compiler Platform SDK component in Visual Studio. No paid tiers or commercial pricing listed on official sources. |
Seller details
Microsoft Corporation
Redmond, Washington, United States
1975
Public
https://www.microsoft.com/
https://x.com/Microsoft
https://www.linkedin.com/company/microsoft/
