Semgrep vs Bolt
Semgrep and Bolt are two popular AI coding tools that developers frequently compare. Both use a freemium pricing model, with Semgrep starting at Free and Bolt 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 Semgrep if you want fast, customizable static analysis for finding bugs and security issues. Semgrep's biggest strengths include extremely fast performance compared to traditional sast tools and easy-to-write custom rules without deep ast knowledge. Choose Bolt if you prefer build full-stack web apps from a single prompt.. Key advantages include incredibly fast for prototyping and mvps and no local setup required — everything runs in the browser. It's also rated higher (4.5 vs 4.3).
Fast, customizable static analysis for finding bugs and security issues
Build full-stack web apps from a single prompt.
| Semgrep | Bolt | |
|---|---|---|
| Pricing | Free | Free |
| Free Tier | Yes | Yes |
| Pricing Model | Freemium | Freemium |
| Rating | ★ 4.3 | ★ 4.5 |
| Categories | Code Review & Testing | Code Generation, No-Code / Low-Code AI |
| Key Features | 6 features | 6 features |
| Feature | Semgrep | Bolt |
|---|---|---|
| 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 | ✓ | — |
| Full-stack app generation from natural language prompts | — | ✓ |
| In-browser IDE with live preview | — | ✓ |
| One-click deployment to production | — | ✓ |
| Supports React, Next.js, and other modern frameworks | — | ✓ |
| Iterative editing through conversation | — | ✓ |
| Built on StackBlitz WebContainers technology | — | ✓ |
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
Bolt
Pros
- + Incredibly fast for prototyping and MVPs
- + No local setup required — everything runs in the browser
- + Generous free tier for casual use
- + Excellent at generating modern full-stack web apps
Cons
- − Generated code may need refinement for production use
- − Limited to web applications and supported frameworks
- − Complex apps can hit token limits quickly
The Bottom Line
Choose Semgrep if: you want 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.
Choose Bolt if: you prefer build full-stack web apps from a single prompt.. It's completely free to use. It holds a higher user rating (4.5 vs 4.3). Keep in mind: generated code may need refinement for production use.
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