The visual refinement layer for AI-generated code

AI builds it. You own it. Edit anytime.

Open StudioHow it WorksPricing
Castle0

Open Studio

Transform ideas into apps

10 free credits

Three steps to production

From idea to monitored production app. No DevOps required.

Start Here

Build

Free

Describe your app and AI builds it. Use templates or start from scratch.

Ship

From $29

7 chaos agents test your app. Auto-fix issues. Deploy when score hits 9.5+.

Live

Included

24/7 monitoring with self-healing. Issues get fixed before users notice.

How it works

From idea to production in minutes.

Step 1

Enter Studio

  • Templates
  • Describe
  • Import
  • Preview
Step 2

AI Builds

  • Spec
  • Components
  • Pages
  • Validate
  • Self-heal
Step 3

Visual Editor

  • Click elements
  • Describe changes
  • AI applies
Step 4

Deploy

  • GitHub
  • Vercel
  • Railway
  • ZIP

Simple, transparent pricing

Build for free. Only pay when you ship to production.

Build

Freeto start

10 credits on signup (~2 builds)

  • AI-powered app generation
  • Visual intent editor
  • 4 starter templates (always free)
  • BYOK for unlimited builds
  • Additional credits from $5
Start Building

Ship Basic

$29per app

Deploy only + basic hardening

  • Basic hardening pipeline
  • One-click deployment
  • Quality score report
  • Vercel / Railway / Netlify
Ship Your App
MOST POPULAR

Ship Pro

$99per app

Full hardening + 30-day monitoring

  • 7 chaos agents test your app
  • Auto-fix until 9.5+ score
  • Security hardening
  • One-click deployment
  • 30 days of Live monitoring
Ship Pro

Live Pro

$49/month

24/7 monitoring + self-healing

  • Real-time uptime monitoring
  • Self-healing capabilities
  • Instant alerts & notifications
  • Performance insights
  • Priority support
Enable Monitoring

Need more credits?

Credits power AI builds. ~5 credits per standard build.

100 Credits

$5

Buy

500 Credits

$20

20% bonus

Buy

1000 Credits

$35

30% bonus

Buy

Also available: Ship Enterprise ($299/app) · Live Enterprise ($99/mo) · Developer API from $29/mo

FAQ

What is Castle0?

The refinement layer for AI-generated code. AI generates your app, then you click any element and describe your change. AI applies it. Generation + Refinement.

Where does my code come from?

Anywhere. Generate fresh with our templates, import from GitHub, upload a ZIP, or paste from v0/Lovable/Bolt. Castle0 works with any codebase.

Why do I need this after generation?

Generation gets you 80%. Castle0 is the last 20% — the visual polish, the edge cases, the production-readiness. Plus we harden your app with 7 chaos agents before deploying.

Do I own the code?

100%. Download the full source code anytime. It's yours to deploy anywhere.

Is there a free tier?

Yes. You get 10 free credits on signup (~2 builds). Templates are always free. You can also use your own API key (BYOK) for unlimited builds at no credit cost.

Built for developers

API + SDK available. Integrate Castle0 into your CI/CD pipeline.

terminal
npm install @castle0/sdk

import { Castle0 } from '@castle0/sdk';

const castle = new Castle0({ apiKey: 'ck_live_...' });

// Build an app
const build = await castle.build({
  prompt: 'Create a project management app'
});

// Ship it (hardening + deploy)
const ship = await castle.ship({
  appId: build.appId,
  tier: 'pro'
});
View Developer Docs