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ui vs json-render

ui and json-render share 19 technologies: React, Next.js, MCP, TanStack, Tailwind CSS, class-variance-authority, next-themes, Radix UI, sonner, react-resizable-panels, embla-carousel-react, vaul, Lucide, ai, @ai-sdk/react, shiki, streamdown, Zod, and geist. Both are written in TypeScript.

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What they share and what sets them apart

shadcn-ui

ui

Composable, accessible components with thoughtful defaults. Build your own component library with code you can customize, extend, and make your own.

TypeScript127.3kRead on November 4, 2026, at commit 8a35366What is ui built with?

Only in ui

In common

vercel-labs

json-render

The Generative UI framework

TypeScript18.9kRead on November 6, 2026, at commit 1819412What is json-render built with?

Only in json-render

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
ui636,496 lines written3,892 code files
json-render167,309 lines written1,048 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
ui3% of its commits signed by AIWith Claude Code, Cursor, GitHub Copilot, Codex, and Devin
json-render1.6% of its commits signed by AIWith Claude Code
ActivityFrom GitHub and its history, on the day SeeRepo read it.
uiLast push November 4, 20262,298 commits127,326 stars
json-renderLast push November 6, 2026250 commits18,930 stars
TestsThe files that test the code, and the share of code files a test imports.
ui415 test files3.8% of its code files have a test that imports them
json-render99 test files11% of its code files have a test that imports them

Frequently asked questions

Which is bigger, ui or json-render?
ui, with 636,496 lines written; json-render has 167,309.

The proof: shadcn-ui/ui's code at commit 8a35366

Which has more GitHub stars, ui or json-render?
ui, with 127,326 stars; json-render has 18,930.

The proof: shadcn-ui/ui on GitHub

Which has more tests, ui or json-render?
ui, with 415 test files; json-render has 99.

The proof: shadcn-ui/ui's code at commit 8a35366

Which was updated more recently, ui or json-render?
json-render: its last push was on November 6, 2026, and ui's on November 4, 2026.

The proof: vercel-labs/json-render's commits on GitHub

Which has more commits signed by AI, ui or json-render?
ui: an AI signed 3% of its commits, with Claude Code, Cursor, GitHub Copilot, Codex, and Devin; in json-render, 1.6%.

The proof: the commits each tool signed in shadcn-ui/ui

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