open-codesign

Open CoDesign turns text prompts into design artifacts on your desktop. Prompt to React prototype, slide deck, PDF, or marketing asset, all rendered in a sandboxed iframe with a live preview pane. It pitches itself as the open-source Claude Design alternative, MIT-licensed and built around your own model API key.

Install in under 90 seconds via Homebrew, winget, or direct download. First launch asks for an API key (Claude, OpenAI, or 20+ providers), paste and go. Everything runs locally; credentials live in `~/.config/open-codesign/config.toml` and nothing leaves your machine unless your model provider needs it. Fifteen built-in demos cover landing pages, dashboards, and mobile UIs to get you started.

Solo designers and small teams get a real Claude Design substitute without the subscription. You pay model tokens only. Larger teams that need brand consistency or shared component libraries should still look at Figma plus AI plugins, since this is built around individual workflows.

The catch: it's young and the Electron app is heavier than a web tool. If you want a polished web design IDE, Claude Design is more refined, but it's $20+ a month and locks you to Anthropic models.