Marmo UI vs Paper

Marmo UI pairs an open-source React design system with a hosted MCP server to help AI agents compose dashboards and apps using named @marmoui/ui components. The server provides live component APIs, composition patterns and generation rules; generated files pass through a review step that checks imports, props and compositions. The library includes more than 50 production-ready components and comes with Storybook and a Figma library. Developers install the React package with npm. The free plan includes documentation, the design tools and MIT-licensed core components, and allows unlimited projects, commercial use and no rate limits. Pro adds generation guided by a DESIGN.md file with brand details, plus composition patterns, Pro blocks, a hosted design-system site and priority support. It costs $9.99 per month, and a 14-day trial is listed. Integration instructions cover Claude Code, Codex, Cursor, Gemini CLI, Windsurf and other MCP clients. Generated code belongs to the user, uses the user’s own LLM tokens and stays in the user’s repository; it does not phone home.

Paper is a connected design canvas for teams working with agents, code, and data. Its HTML/CSS canvas exports designs as code and supports a workflow between the canvas and code. Agents can read and write the canvas to work on responsive layouts, style variations, and consistency checks. Paper MCP also lets agents generate layouts, use real content, and convert selected frames into code, with setup paths for Claude, Codex, Cursor, OpenCode, Antigravity, GitHub Copilot, VS Code, and others. The Snapshot extension copies web components into Paper as editable layers. Figma selections can also be copied as editable layers, though components, variables, masks, and rich text are not fully supported. The Free plan includes unlimited viewers and editors and 100 MCP tool calls per week. Pro is listed at $2,016 a month, billed yearly; paid plans keep viewer seats free. Paper is available on the web and Linux, macOS, and Windows, with an extension. Its DPA describes security controls and restricts specified categories of customer data.