DeepSource SAST vs Promptfoo Code Scanning / GitHub Action: Side-by-Side Comparison (2026)

DeepSource SAST: SAST engine that scans code commits for security vulnerabilities. built by DeepSource. Core capabilities include Automated security scans on every commit, Thousands of security checks per scan, Pre-production vulnerability detection..

Promptfoo Code Scanning / GitHub Action: GitHub Action scanner for LLM-specific app vulnerabilities like prompt injection. built by Promptfoo. Core capabilities include Detection of prompt injection vulnerabilities in LLM applications, Identification of data exfiltration vectors via indirect prompt injection, PII exposure detection in LLM inputs and logs..

Both serve the Static Application Security Testing market but differ in approach, feature depth, and target audience.

DeepSource SAST differentiates with Automated security scans on every commit, Thousands of security checks per scan, Pre-production vulnerability detection. Promptfoo Code Scanning / GitHub Action differentiates with Detection of prompt injection vulnerabilities in LLM applications, Identification of data exfiltration vectors via indirect prompt injection, PII exposure detection in LLM inputs and logs.

DeepSource SAST is developed by DeepSource. Promptfoo Code Scanning / GitHub Action is developed by Promptfoo. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

DeepSource SAST integrates with GitHub, GitLab, Bitbucket, Azure DevOps. Promptfoo Code Scanning / GitHub Action integrates with GitHub, GitHub Actions. Check integration compatibility with your existing security stack before deciding.

DeepSource SAST and Promptfoo Code Scanning / GitHub Action serve similar Static Application Security Testing use cases: both are Static Application Security Testing tools, both cover DEVSECOPS, CI/CD, Security Scanning. Key differences: DeepSource SAST is Commercial while Promptfoo Code Scanning / GitHub Action is Free. Review the feature comparison above to determine which fits your requirements.