Comparison
Kolega vs SonarQube
SonarQube is the tool most engineering teams already have. It's been around since 2008, runs in tens of thousands of CI pipelines, and has become the default for “clean code” — readability, maintainability, technical debt, test coverage.
It also does security scanning. That's the part this comparison is about.
On the RealVuln benchmark of 676 real vulnerabilities, Kolega scores 92.4%. SonarQube hasn't been tested on the public leaderboard yet, but its detection approach — rule-based pattern matching — sits in the same category as the tools that score 15–20%.
That's not a knock on SonarQube. It's a different product solving a different problem.
View the full RealVuln benchmarkThe headline difference
| Metric | Kolega | SonarQube |
|---|---|---|
| Primary purpose | Vulnerability detection | Code quality + maintainability |
| Approach | Deep semantic analysis | Pattern matching with taint analysis |
| RealVuln F3 score | 92.4% | Not yet tested |
| Catches BOLA / logic flaws | ✓ | Limited |
| Catches code smells / duplication | ✗ | ✓ |
| Catches technical debt | ✗ | ✓ |
| Built for AI-generated code | ✓ | ✗ |
SonarQube is a code quality tool that ships security as a feature. Kolega is a vulnerability detection engine that doesn't try to measure code quality.
What each tool is actually built for
SonarQube. Started life as a code quality scanner. Its core promise is “clean code” — code that's readable, maintainable, well-tested, with low technical debt. Security scanning was added later, layered on top of the same rule-based engine that powers the quality checks. If your team is graded on technical debt or PR quality gates, SonarQube is doing real work for you.
Kolega. Built specifically to find security vulnerabilities. Doesn't measure code quality, doesn't flag code smells, doesn't track technical debt. The engine reads data flow across your codebase to identify the kinds of bugs that ship to production and become CVEs.
The two products overlap on “we'll scan your code for things that look wrong,” but the things they're each looking for are different.
Feature comparison
| Feature | Kolega | SonarQube |
|---|---|---|
| Vulnerability detection (SAST) | Yes (semantic analysis) | Yes (pattern matching) |
| BOLA detection | ✓ | Limited |
| Race condition detection | ✓ | ✗ |
| Logic flaw detection | ✓ | ✗ |
| Code quality / smells | ✗ | ✓ |
| Technical debt tracking | ✗ | ✓ |
| Test coverage analysis | ✗ | ✓ |
| Duplication detection | ✗ | ✓ |
| AI-generated code coverage | ✓ | Limited |
| Autofix PRs with tests | ✓ | Limited (Enterprise) |
| Self-hosted | Enterprise tier | Yes (Community Edition free) |
| Language coverage | 12 languages | 30+ languages |
| Free tier | 1 app, 250k LOC | Community Edition (free, self-hosted) |
| Starting paid price | From $39/mo | $32/mo (Cloud) or ~$2,500/yr (Developer Edition) |
| Enterprise pricing | Custom | $16,000+/yr |
When to pick SonarQube
If your priority is code quality — readability, maintainability, technical debt — SonarQube is purpose-built for that. The security scanning is a useful bonus, not the main product.
If you need to enforce quality gates in CI (test coverage thresholds, code smells, duplication limits), this is exactly what SonarQube does, and no security-first tool replaces it.
If you need self-hosted with zero licensing cost, SonarQube Community Edition is free, mature, and self-hostable. Few SAST tools can compete on that.
If you have 30M+ lines of code and need a tool that scales to that size across 30+ languages, SonarQube has been doing it for over a decade and the product reflects it.
When to pick Kolega
If your priority is catching security vulnerabilities — not maintainability — Kolega is built specifically for that. The detection depth is the entire pitch.
If your codebase is increasingly AI-generated and you've noticed that traditional rule-based scanners are missing the bugs that actually matter, semantic analysis catches a different class of defect.
If you want autofix PRs that include regression tests by default, Kolega's PR generation is built around that. SonarQube has autofix only on Enterprise tiers and the fixes aren't test-backed.
If SonarQube's Enterprise pricing ($16k+/yr for 1M LOC) is more than your team can justify for security alone, Kolega's $39/mo starter tier covers most teams that aren't enterprises yet.
When to run both
This is the most common pattern we see. Teams run SonarQube for code quality gates and Kolega for vulnerability detection. The two products don't conflict — different engines, different signals, different teams care about each.
A common stack: SonarQube enforces quality thresholds on every PR (test coverage, complexity, smells), Kolega scans the same PR for security vulnerabilities and opens fix PRs. Both run in CI, both report into your Git provider, neither replaces the other.
FAQ
Why isn't SonarQube on RealVuln?
It's an open benchmark and any vendor can run it. SonarQube hasn't been tested on the public leaderboard yet. We'd welcome the data and would publish whatever it showed. The benchmark is built to make detection depth comparable across tools.
Can SonarQube replace Kolega?
For code quality, no — Kolega doesn't do code quality. For security, SonarQube does it as a secondary feature, layered on the same engine that does the quality checks. If security is your top priority, a dedicated security tool will outperform a quality tool that does security on the side. That's the case for picking Kolega over SonarQube specifically for vulnerability detection.
Can Kolega replace SonarQube?
Not for code quality. We don't measure technical debt, code smells, duplication, or test coverage. Teams that switch fully from SonarQube usually do so because they've changed their priorities — moved from “ship cleaner code” to “ship more secure code.” If both matter, you run both.
Why is Kolega so much cheaper than SonarQube Enterprise?
We do one thing, code analysis for security, and price accordingly. SonarQube Enterprise prices for the breadth and the install base — code quality, security, technical debt, compliance, all running at scale across millions of lines of code. Different product, different price.
Does Kolega store my code?
Code is cloned into ephemeral containers for the scan and deleted immediately after. SonarQube Cloud does the same; self-hosted SonarQube keeps code in your infrastructure.
See the benchmark for yourself
If detection depth matters more than code quality, scan a repo with both tools and compare what each one finds. SonarQube will flag things Kolega won't. Kolega will flag vulnerabilities SonarQube doesn't reach.
Scan a repo freeNo credit card required. 7-day Pro trial. Drops to a free tier afterwards.