In this article, we’ll explore 6 of the best open-source shadcn/ui block libraries available today. Each provides a registry, supports MCP, and is built with AI workflows in mind, making it easy for both humans and AI agents to pull in components, iterate safely, and avoid running out of tokens.
shadcn/ui has quickly become a favorite among React + Tailwind developers thanks to its composable architecture and highly customizable design approach. But what really unlocks its power is the growing ecosystem around it, especially block libraries that provide ready-made layouts, templates, and workflows.
1. Creative Tim UI
Creative Tim UI offers a wide range of ecommerce product blocks, marketing sections, and form-focused layouts, letting you assemble storefronts, landing campaigns, onboarding flows, and signup journeys quickly without reinventing the wheel. It’s installable via a registry and works great for production applications.
Why it’s awesome
- 100+ ready for AI blocks
- Easy CLI install
- Good design consistency
Best for: Teams building polished SaaS, ecommerce storefronts, marketing pages, or form-heavy workflows.
2. shadcn Blocks (Official)
The official set of pre-built layouts and page-level sections for shadcn/ui. Instead of just raw components, shadcn/ui Blocks give you marketing sections, dashboards, auth screens, etc.
Why it’s awesome
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Officially maintained
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Good quality + accessibility
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Works with any React framework
Best for: Quickly assembling pages and flows
3. Supabase UI
A shadcn/ui-based component library designed to work seamlessly with Supabase. Includes pre-built elements like auth forms, file upload, realtime examples, etc.
Why it’s awesome
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Strong integration with Supabase
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Ideal for auth + storage flows
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React + Tailwind based
Best for: Supabase-powered applications
4. Blocks.so
A community-driven library offering free shadcn/ui blocks you can copy-paste into your app like hero sections, forms, stats blocks, and more.
Why it’s awesome
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60+ ready-made UI blocks
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Free & open-source
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Nice for marketing pages + dashboards
Best for: Rapid prototyping
5. SMOOTHUI
A modern animated UI kit built with shadcn/ui + Tailwind + Framer Motion. It provides interactive components that feel polished out-of-the-box.
Why it’s awesome
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Premium look & feel
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Animation-first
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Modern React patterns
Best for: Motion-friendly interfaces (SaaS, dashboards)
6. Efferd UI
A growing UI resource based on shadcn/ui, focused on clean blocks, templates, and components. It’s useful for building consistent landing + product UI quickly.
Why it’s awesome
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Good selection of blocks and templates
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Clean Tailwind styling
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Easy to drop into existing projects
Best for: Marketing & SaaS landing pages
What makes these libraries especially valuable today is that they all provide registries, support MCP, and are ready for AI-powered workflows. These features let AI models selectively fetch components and assets, improving reliability and helping avoid “run-out-of-tokens” problems during generation. Because components can be pulled on demand, AI-driven and agent-based systems can iterate intelligently making UI workflows more predictable and maintainable.
As AI-assisted development becomes the norm, tools that support predictable iteration and stable retrieval will stand out. These libraries position the shadcn/ui ecosystem perfectly for that future.
