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3 Ruby templates

Build Ruby apps with AI

Build a Rails app by describing it. The starter is a Rails project in the standard layout, with generators, migrations and a console in the terminal.

Pick a Ruby template See pricing
Rails with ORM, migrations and generators; Sinatra for a one-file app
A Rails AI SaaS starter with Supabase sign-in, AI chat and knowledge search
The Ruby toolchain in a real terminal, beside 15 coding CLIs

The Ruby templates

Start opens the New Web App dialog with the template picked — you set the stack, design, model and MCP tools there.

  • Rails

    The full-stack Ruby framework — ORM, migrations, generators and a console.

    Framework docs
  • Sinatra

    A small Ruby web app — one file, pure-Ruby gems, no compiler needed.

    Framework docs
  • Rails AI SaaSAI SaaS

    An AI SaaS dashboard: landing, Supabase sign-in, AI chat with history, MCP tools and knowledge search.

Every Ruby project gets

  • A cloud sandbox with a live preview of the running app
  • A real terminal with 15 coding CLIs — Claude Code, Codex, Cursor CLI, Gemini CLI and more
  • AI on your own keys from 24 providers, billed by the provider at cost
  • Its own GitHub repository from the first push

Where it can go

Vercel does not run Rack applications, so Rails and Sinatra do not deploy there. The project lives in your GitHub repository from the first push — deploy it to any host that runs a persistent Ruby server or a container.

Questions

Can I build a Ruby app with AI?

Yes. Pick one of 3 Ruby templates — Rails and Sinatra — and describe what you want. The builder writes the code in a cloud sandbox with a live preview and a real terminal, using your own AI provider key.

Where can I deploy a Ruby app built here?

Vercel does not run Rack applications, so Rails and Sinatra do not deploy there. The project lives in your GitHub repository from the first push — deploy it to any host that runs a persistent Ruby server or a container.

What happens when I press Start?

You sign up — or, if you are already signed in, go straight on — and the New Web App dialog opens with that template picked. Set the name, stack, design, model and MCP tools there, then press Create.

Do I own the code?

Yes. The project is pushed to your own GitHub repository, and you can open a terminal on it at any point.

Start your Ruby app

7 days free, no card. Plans from $8 a month for the sandbox — AI is billed by your provider, at cost.

Pick a template