An awesome open-source Claude Design alternative is here!

Open Design: free Claude Design alternative, local-first, BYOK, 129 design systems, runs with your own AI agent.

In mid-April 2026, Anthropic released Claude Design, and the entire design community exploded.

Describe what you want in a single sentence, and it instantly delivers a fully interactive HTML design artifact — no Figma, no Photoshop, not even design skills required. This “text-to-finished-product” experience made countless people see the future of the design industry.

But the excitement didn’t last long. Reality quickly hit hard: Claude Design is only available for preview to paid users, completely closed-source, all data must be uploaded to Anthropic’s cloud, you can’t switch to other models, and self-hosting is impossible.

This isn’t a tool — it’s locking creators inside a beautiful cage.

But the open-source community never lacks talent. Tom Huang, founder of nexu.io, open-sourced a Claude Design alternative on GitHub: Open Design.

Just 5 days after launch, it has already garnered 18.2K stars on GitHub. The momentum is incredible. Developers are calling it “the true open-source killer of Claude Design — and even stronger.”

Instead of training a new AI model from scratch, it takes a smarter, more open approach: it doesn’t create a new AI agent. It turns the coding agents you already have on your computer (Claude Code, Codex, Cursor, Gemini, etc.) into powerful design engines.