VulnGraph vs Semgrep
Pattern-based single-repo SAST, meet cross-repo dataflow.
Semgrep is a fast, developer-friendly pattern-based static analyzer with strong single-repository rules and a large community ruleset. VulnGraph doesn't compete on in-file patterns — it builds a unified graph across services and repositories and tracks taint along it. Semgrep is excellent inside a repo; VulnGraph sees the seams between them.
| Capability | VulnGraph | Semgrep |
|---|---|---|
| Pattern-based single-repo rulesSemgrep's core strength. | — | ✓ |
| Custom rule authoring | ~ | ✓ |
| Cross-service dataflow / taint analysis | ✓ | — |
| Cross-repository architecture graph | ✓ | — |
| Blast radius & AI-access exposure | ✓ | — |
| SARIF / GitHub Code Scanning output | ✓ | ✓ |
✓ full · ~ partial · — not offered
When Semgrep fits
Choose Semgrep for fast, customizable, in-repo static analysis and security guardrails developers run on every PR.
When VulnGraph fits
Choose VulnGraph when the vulnerability spans services or repositories — the path no single-repo pattern can match because no single repo contains it.
Using them together
Pair them: Semgrep guards each repository on every commit; VulnGraph analyzes the architecture those repositories form. Both emit SARIF for one unified view.