Devin vs Bolt
Devin builds more complete applications autonomously. Bolt produces demos faster. Devin's code is more flexible but unpredictable; Bolt's code is faster but shallower. Both need significant hardening for production.
Devin and Bolt both generate apps from descriptions but work differently. Devin is an autonomous AI engineer that plans, codes, and debugs over minutes to hours. Bolt is an instant prototype builder that generates working demos in the browser in seconds. Devin goes deeper; Bolt goes faster. The code quality difference reflects this trade-off.
Head-to-head comparison
Code structure
DevinDevin
Variable architecture depending on the task. Can produce well-structured code or layers of patches from debugging iterations. Unpredictable but often more complete.
Bolt
Large files with mixed concerns. Minimal file organization. Loose TypeScript. Gets a demo working quickly but structure is an afterthought.
Security
DevinDevin
May implement auth and security but decisions are autonomous and need validation. Security posture varies — sometimes thoughtful, sometimes neglected.
Bolt
No security layer. No auth, no validation, hardcoded keys. Zero security by design — it is a prototyping tool.
Backend / data layer
DevinDevin
Can build real backends with databases, APIs, and business logic. Backend architecture varies in quality but at least exists.
Bolt
Backend is often absent or minimal. Frontend-heavy prototypes with mock data. A complete backend needs to be built for production.
Speed of prototyping
BoltDevin
Takes minutes to hours depending on complexity. Autonomous but not instant. Better for complex tasks with multiple steps.
Bolt
Working demos in seconds to minutes. The fastest path from idea to visual prototype. Unmatched for speed.
Deployment readiness
DevinDevin
May include deployment configuration depending on the task. Needs review but can be closer to deployable than pure prototyping tools.
Bolt
Prototypes often break when deployed. Hardcoded URLs, missing env vars, CORS issues. Export and significant cleanup needed.
Long-term maintainability
DevinDevin
Variable. Well-defined tasks produce maintainable code. Complex tasks may result in fragile solutions with workaround layers.
Bolt
Prototype code that resists modification. Adding features causes regressions. Not built for long-term maintenance.
Code quality
Devin produces more complete, more thoughtful code that is closer to production-ready. Bolt produces faster prototypes that need significantly more work. For demos and validation, Bolt is faster. For anything you plan to ship, Devin's more thorough approach produces better starting material.
Security
Devin at least attempts security — auth, access controls, validation — but its autonomous choices need verification. Bolt does not attempt security at all. Devin's code needs security review; Bolt's code needs security built from scratch.
Which should you choose?
Choose Devin if...
Well-defined development tasks you want completed autonomously. Best for building features, integrations, and backend logic without constant supervision.
Devin servicesChoose Bolt if...
Ultra-fast prototyping and demos. Best when you need something visual in minutes and are prepared to rebuild for production.
Bolt servicesThe bottom line
Bolt for speed, Devin for depth. Use Bolt to validate ideas in minutes. Use Devin to build more complete solutions autonomously. For production, both need human review — but Devin gets you further along the path.
Whichever tool you used, we'll review the code
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Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 checks
- SSL/TLS analysis
- Security headers
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Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerabilities
- Code quality review
- Dependency audit
- AI pattern analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
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Frequently asked questions
Can Devin improve a Bolt prototype?
You could export a Bolt project and task Devin with adding backend logic, auth, and security. Devin can work with existing codebases. Just review everything Devin produces — autonomous improvements still need human validation.
Which is cheaper for building an MVP?
Bolt for the initial prototype is cheaper in time and money. Devin costs more per task but produces more complete output. The total cost depends on how much production work remains. A Bolt prototype plus professional hardening may cost more than Devin plus targeted review.
Other comparisons
Cursor vs Lovable
Cursor produces more production-ready code but requires coding knowledge.
Cursor vs Bolt.new
Cursor gets closer to production-ready code.
Cursor vs v0
Cursor builds full-stack apps while v0 generates UI components.
Cursor vs GitHub Copilot
Cursor is more capable for building full features.
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