DeepSource vs Semgrep
DeepSource and Semgrep are both popular tools in the Code Review & Testing space. Both use a freemium pricing model, with DeepSource starting at Free and Semgrep at Free. Both offer a free tier to get started. Below we break down features, pricing, strengths, and weaknesses to help you decide which tool fits your workflow best.
Last updated: March 2026
Quick Verdict
Choose DeepSource if you want automated code quality and security analysis for modern teams.. DeepSource's biggest strengths include autofix prs save significant remediation time and free for open-source projects. Choose Semgrep if you prefer fast, customizable static analysis for finding bugs and security issues. Key advantages include extremely fast performance compared to traditional sast tools and easy-to-write custom rules without deep ast knowledge.
Automated code quality and security analysis for modern teams.
Fast, customizable static analysis for finding bugs and security issues
| DeepSource | Semgrep | |
|---|---|---|
| Pricing | Free | Free |
| Free Tier | Yes | Yes |
| Pricing Model | Freemium | Freemium |
| Rating | ★ 4.3 | ★ 4.3 |
| Categories | Code Review & Testing | Code Review & Testing |
| Key Features | 6 features | 6 features |
| Feature | DeepSource | Semgrep |
|---|---|---|
| Static code analysis across multiple languages | ✓ | — |
| Automated fix generation with Autofix PRs | ✓ | — |
| Security vulnerability detection | ✓ | — |
| Code coverage tracking and enforcement | ✓ | — |
| GitHub, GitLab, and Bitbucket integration | ✓ | — |
| Custom analysis rules and configurations | ✓ | — |
| Pattern-based code scanning across 30+ programming languages | — | ✓ |
| Custom rule creation with intuitive YAML syntax | — | ✓ |
| Thousands of pre-built security and code quality rules | — | ✓ |
| CI/CD integration with GitHub Actions, GitLab, and more | — | ✓ |
| Fast local scanning with minimal false positives | — | ✓ |
| Differential scanning to analyze only changed code | — | ✓ |
DeepSource
Pros
- + Autofix PRs save significant remediation time
- + Free for open-source projects
- + Broad language support with deep analysis
- + Clean dashboard for tracking code health
Cons
- − Some language analyzers more mature than others
- − Can produce false positives on complex patterns
- − Enterprise features require paid plan
Semgrep
Pros
- + Extremely fast performance compared to traditional SAST tools
- + Easy-to-write custom rules without deep AST knowledge
- + Strong open-source community with extensive rule library
- + Privacy-first with local scanning and no code upload required
Cons
- − Advanced features like cross-file analysis require paid plans
- − Learning curve for writing complex multi-pattern rules
- − Language support maturity varies across different ecosystems
The Bottom Line
Choose DeepSource if: you want automated code quality and security analysis for modern teams.. It's completely free to use. Keep in mind: some language analyzers more mature than others.
Choose Semgrep if: you prefer fast, customizable static analysis for finding bugs and security issues. It's completely free to use. Keep in mind: advanced features like cross-file analysis require paid plans.
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