Paper is a new design tool built around the idea that design, code, and AI agents should share one canvas. You sketch and lay out UI on an infinite web-based canvas, then pull live data into the design from APIs or your own database, and let agents like Cursor, Claude, Windsurf, or Zed see and modify the same canvas through a shared protocol. The result is closer to a working prototype than a static mockup.

The app runs entirely in the browser and exports clean component code instead of vector art, which means handoff to a real codebase tends to skip the usual Figma-to-React translation step. Used internally by teams at Vercel, Perplexity, Lovable, PostHog, Tailwind, Dub, Replicate, Zed, and Attio.

Pricing is freemium: a free plan covers solo experiments, with a paid plan around $20/mo and team pricing on top. Paper is still relatively new, and access has been invite-gated at points — but it has a real public roadmap and a blog with regular posts on what they're shipping.