Powered by Claude AI — your extensions, your Docker containers

Build full-stack extensions with one sentence

Sign up, describe what you want, and Claude builds it — a full FastAPI + HTMX app, running in your own isolated Docker container with its own subdomain.

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AI Builder — ExtensionOS
# Your prompt:
"Build a simple CRM — contacts with name, email, company, notes. Add a timeline of interactions."
# Claude building...
✓ Created models: Contact, Interaction
✓ Built API routes: CRUD + search
✓ Rendered HTMX templates with sidebar
✓ Container running at crm.yourname.factory0.in
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From idea to live app in minutes

No DevOps. No Dockerfile wrestling. Just describe what you want.

Step 1
Sign up
Get your own subdomain: yourname.factory0.in — free to start.
Step 2
Activate assets
One click to spin up PostgreSQL, Redis, RabbitMQ. No config needed.
Step 3
Describe your app
Tell Claude what to build. It writes the full-stack code.
Step 4
It's live
Your extension runs in its own Docker container at its own subdomain.

Everything you need. Nothing you don't.

Every account gets a full isolated environment.

Claude AI Builder
Describe your extension in plain English. Claude generates a complete FastAPI + HTMX app.
Full Isolation
Your containers, your network. Other tenants can't touch your data or code.
One-click Assets
PostgreSQL, Redis, RabbitMQ, pgvector, Qdrant — activate any asset instantly.
Custom Subdomains
Every extension gets its own URL: myapp.yourname.factory0.in
Claude API Integration
Connect your own Claude API key or OAuth. No vendor lock-in.
HTMX Frontend
Fast server-rendered UIs with HTMX. No React bundle headaches.

Infrastructure, activated instantly

Forget writing docker-compose files. Toggle an asset and it's running in seconds, with credentials securely injected into your extension containers.

Start building
PostgreSQL
Primary database
MySQL
Alternative RDBMS
Redis
Cache & queues
RabbitMQ
Message broker
pgvector
Vector search
Qdrant
Vector database
Valkey
Redis alternative
Memcached
In-memory cache

Ready to build?

Sign up in 30 seconds. No credit card. No infrastructure to manage.

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