Puma Scan vs SonarQube: Choosing a .NET SAST Tool

Choosing the right static application security testing (SAST) tool for .NET projects is a decision that shapes how your team catches vulnerabilities, how fast your pipeline runs, and how much you spend doing it. Puma Scan and SonarQube are two tools that appear on most shortlists, but they take fundamentally different approaches. This post breaks down where each tool excels so you can pick the right fit for your team.

At a Glance

Code Quality vs Security-First

SonarQube was built as a code quality platform. Its strength is identifying bugs, code smells, code duplication, and maintainability issues across dozens of languages. Security scanning was added over time, and the depth of security rules varies by language and edition. Notably, taint analysis for C# — the technique that traces untrusted user input through your code to find injection vulnerabilities — requires SonarQube’s paid Developer Edition or higher.

Puma Scan was built security-first for .NET. Every rule targets a real vulnerability class: SQL injection, cross-site scripting, insecure deserialization, weak cryptography, server-side request forgery, and more. The rule documentation covers the full catalog. Taint analysis ships in all Professional editions, starting with the $299/year End User license.

If your primary concern is security posture in a .NET codebase, Puma Scan delivers that focus out of the box.

Real-Time IDE Experience

One of the biggest differences is when you see results. Puma Scan works like a spellchecker for security — vulnerabilities appear as compiler warnings in Visual Studio and VS Code the moment you type vulnerable code. There is no build step, no context switch, and no waiting for a pipeline to finish. Developers see and fix issues in the same flow where they write code.

SonarQube primarily runs as a server-side scan. SonarLint, their IDE companion, provides some in-editor feedback, but its .NET analysis depth depends on connection to a SonarQube server for the full rule set. The feedback loop is longer: write code, push, scan, review results, fix.

For teams that want developers to catch security issues before code ever leaves their machine, real-time IDE scanning eliminates an entire class of late-stage findings that slow down releases.

.NET Depth vs Language Breadth

SonarQube supports over 22 programming languages. If your organization has Java microservices, a Python data pipeline, a React frontend, and a .NET API, SonarQube gives you one dashboard for all of it. That breadth is genuinely valuable for polyglot teams.

Puma Scan takes the opposite approach: go deep on .NET. The analyzer understands ASP.NET MVC routing, Web Forms lifecycle, .NET Core middleware, and configuration file patterns that generic scanners miss. It scans C# source, view markup files (.aspx, .cshtml), and configuration files (.config, .json) with framework-aware context. See the FAQ for a full list of supported frameworks.

The trade-off is clear. If .NET is your primary stack, depth wins. If you need one tool across many languages, breadth wins.

CI/CD and Pipeline Integration

Both tools integrate into CI/CD pipelines, but through different models.

Puma Scan offers purpose-built editions for specific platforms: a dedicated Azure DevOps extension that plugs directly into your build pipeline, plus Cloud CI editions for GitHub Actions and GitLab CI. Configuration is straightforward — install the extension, point it at your solution, and results appear in your pipeline output.

SonarQube’s CI integration works through its scanner CLI and has plugins for Jenkins, Azure DevOps, GitHub Actions, GitLab, Bitbucket, and more. The ecosystem is broader, and if you already run a SonarQube server, adding another project is incremental.

A notable bridge between the two: Puma Scan supports SonarCloud output format, meaning teams can run Puma Scan’s deep .NET analysis and import the results into SonarCloud for unified dashboarding alongside other languages.

Pricing

Both tools offer free Community Editions. Beyond that, the pricing models differ significantly.

Puma Scan uses per-seat pricing. The End User Professional license is $299/year for one developer (up to 3 machines). Server Edition starts at $4,999/year and includes 5 End User licenses. Cloud CI editions start at $5,999/year for up to 20 pipelines. Costs are predictable regardless of codebase size.

SonarQube prices by lines of code analyzed. SonarQube Cloud starts at approximately €30/month for up to 100K LOC. Self-hosted Developer, Enterprise, and Data Center editions are priced per instance per year based on LOC. As your codebase grows, so does the bill.

For .NET teams with large codebases, Puma Scan’s per-seat model can be significantly more cost-effective. For smaller polyglot codebases where LOC stays low, SonarQube’s model may work well.

When to Choose Each Tool

Choose Puma Scan if:

• Your team primarily writes C# and .NET
• You want real-time security feedback inside Visual Studio or VS Code
• You need taint analysis without jumping to an expensive enterprise tier
• You prefer predictable per-seat pricing over LOC-based scaling
• You run Azure DevOps, GitHub Actions, or GitLab CI pipelines

Choose SonarQube if:

• You have a polyglot codebase spanning many languages
• Code quality metrics (duplication, complexity, maintainability) are as important as security
• You want a single dashboard for all languages and projects
• You are already invested in the Sonar ecosystem (SonarLint, SonarCloud)

Use both together for the best of both worlds: run Puma Scan for deep .NET security analysis with real-time developer feedback, then export results in SonarCloud format to unify reporting alongside your other language stacks.

Get Started

Ready to try Puma Scan on your .NET project? The Community Edition is free and open source. For advanced taint analysis, reporting, and CI/CD integration, start a free trial of Puma Scan Professional. Check the installation guide to be up and running in minutes.