TL;DR
Cursor is an AI-assisted editor: you see and control every line. Bolt.new generates whole apps, and you may not understand all of what it wrote. Cursor gives you more security control in exchange for more expertise; Bolt is faster and can slip in insecure patterns you won't notice. Either way, review before you ship.
Fundamental Differences
| Aspect | Cursor | Bolt.new |
|---|---|---|
| Development Model | AI-assisted coding | AI app generation |
| Code Visibility | You see everything | Generated in browser |
| Control Level | Full control | Prompt-based |
| Learning Curve | Requires coding knowledge | Minimal coding needed |
| Security Review | Easier (you wrote it) | Harder (generated code) |
Security Control
Cursor: Direct Control
With Cursor, you're writing code with AI assistance:
- You see every line the AI suggests, and accept or reject each one
- You understand the code because you're the one building it
- Whatever security knowledge you have gets applied as you go
- Security config is yours from the first commit
Bolt.new: Generated Code
Bolt.new creates complete applications from prompts:
- The whole app comes out of a natural-language prompt
- You might not understand everything it generated
- Security is whatever the AI's defaults happen to be
- So the generated code needs a careful read
- You can prompt again to fix what you find
Bolt.new Risk: Code you don't understand is code where you'll miss the security bugs. Generated apps often ship without proper authentication, input validation or RLS.
Common Security Issues
| Issue | Cursor | Bolt.new |
|---|---|---|
| Exposed API Keys | You control placement | May be in frontend code |
| Missing Auth | You implement it | Often not included |
| No Input Validation | Add as you code | Frequently missing |
| Supabase RLS | Configure yourself | Usually disabled |
| CORS Issues | You configure | Often too permissive |
Security Review Difficulty
Cursor Projects
Reviewing a Cursor-built app is mostly straightforward:
- You wrote (or accepted) every line, and the architecture calls were yours
- You already know where the sensitive operations live
- Git history shows what changed and when
Bolt.new Projects
Generated apps take more work:
- You have to understand code you didn't write, often in patterns you haven't seen
- Security issues are scattered across the whole codebase, not one file
- Fixing them can take several rounds of prompting
Recommendation: On Bolt.new, export the code and read it before you deploy. Run a security scanner too; it'll catch the common stuff fast.
Deployment Considerations
| Deployment Aspect | Cursor | Bolt.new |
|---|---|---|
| Deployment Control | Full control (your choice) | Built-in deployment |
| Environment Variables | You configure | May need reconfiguration |
| Security Headers | You set up | Usually missing |
| Production Readiness | Depends on your setup | Prototype-level |
Which Should You Choose?
Choose Cursor If:
You can code, you want full control over security, or you're building something for production that has to pass a compliance review. Cursor lets you build security in as you go.
Choose Bolt.new If:
You're prototyping, learning, or building an internal tool where the stakes are low. Plan to review and harden the generated code before anything goes to production.
Is Bolt.new safe for production apps?
Bolt.new writes working code, but it's built for fast prototyping. A production app needs a security review, real authentication, proper environment variables and database security, and none of that comes by default.
Can I improve Bolt.new security with prompts?
Yes. You can ask for it directly: "Add authentication using Supabase Auth" or "Enable RLS on all tables." You still have to check that what it generated actually works.
Which is better for learning secure coding?
Cursor, because you watch the security get implemented. On Bolt.new it's abstracted away, when it's there at all. Ask Cursor's AI to explain each pattern and you'll learn why it matters, not just what it is.
Further Reading
Made your choice? Here's how to secure your selected stack.
Scan Your AI-Generated App
Check for security issues in Cursor or Bolt.new projects.