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Once UI 2.0 — AI for Software Development

An open-source design system and component library for React and Figma to build applications faster.

What is Once UI 2.0?

Once UI 2.0: An open-source design system and component library for React and Figma to build applications faster. It has a free plan; paid plans start at $128. Zekai's independent review scores it 9.1 out of 10. Best for react and Figma development.

Facts checked 9 Oct 2026.

DifferentiatorCombines a React component library with a Figma design system and multi-surface templates
Proof150+
Try Once UI 2.0
Free Plan Pro from$128
Free plan verified · free AI tools for Developers
9.1 Zekai
React & Figma Design System
AI for Software Development
Ease of Use
8.0
Accuracy
10.0
Value
8.0
Time Saving
10.0
ReactFigmaNext.jsOpen SourceUI Components
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Zekai Verdict

What is it?
Once UI 2.0 is an open-source design system built for React and Figma, offering a flexible style framework and modular components.
Best for
AI for Software Development
Not ideal for
Unique syntax takes time to learn if coming from Tailwind
Price
Free plan · paid from $128
Zekai Score
9.1/10
Hand-scored by Zekai

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⚡ Quick answer

Once UI 2.0 is an open-source design system and component library built for React and Figma. It provides developers and creators with pre-styled UI blocks, templates, and composable surfaces to build applications efficiently.

CategoryDesign System
Best forReact and Figma development
Price from$128
Free planyes
DifferentiatorCombines a React component library with a Figma design system and multi-surface templates
Proof150+
Rating4.5
📖 About Once UI 2.0

Once UI 2.0 is an open-source design system built for React and Figma, offering a flexible style framework and modular components. It provides deployment-ready products and templates across seven surfaces like landing pages, dashboards, and documentation apps.

How It Works

Your workflow, automated

1
Choose your environment
Install the Once UI core package via NPM or set up your branding inside the Figma design library.
2
Assemble your pages
Use the 100+ copy-paste blocks and Stack surfaces to layout your landing pages, dashboards, or documentation sites.
3
Ship your product
Connect your backend services, customize your theme, and deploy your React application to production.
Ready to automate your workflow with Once UI 2.0?
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Real Impact

Before & After

❌ Before

Spending weeks building design systems, layouts, and multi-surface app scaffolding from scratch.

Weeks of setup
✅ After

Launching fully styled React applications and design prototypes immediately using open-source blocks and templates.

Launch ready
AI Prompts

Prompts for Developers

Prompt 01 The SQL Query Generator with Schema Context
CREATE TABLE users ( id SERIAL PRIMARY KEY, name VARCHAR(100), email VARCHAR(100) UNIQUE, created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW() ); CREATE TABLE orders ( id SERIAL PRIMARY KEY, user_id INTEGER REFERENCES users(id), amount…
Prompt 02 The MCP-Aware Database Migration Agent
(for interacting with the Prisma schema and CLI) *
Prompt 03 The Agentic E2E Test Runner
(for creating GitHub issues) Scenario: The "new user registration" feature has been deployed to the staging environment at
See all 18 AI prompts for Developers →
Social Proof

Trusted by professionals

Ease of Use
8.0
Accuracy
10.0
Value
8.0
Time Saving
10.0
Connects With

Once UI 2.0 integrations

React Next.js Figma Supabase Vite React Router
Setup complexity: Moderate
Once UI 2.0 is an open-source design system built for React and Figma, offering a flexible style framework and modular components. It provides deployment-ready products and templates across seven surfaces like landing pages, dashboards, and documentation apps.
The decision

Is Once UI 2.0 worth it?

Built for
Frontend developers, UI/UX designers, and indie creators building React applications.
Effort to adopt
Moderate
Who It's For

Why Software Development choose this tool

🎯
Built for
AI for Software Development
In-Depth Overview
Once UI 2.0 addresses the tedious overhead of setting up frontend architecture, component styling, and multi-surface applications from scratch. By providing a unified system for React and Figma, the platform lets you bridge the gap between design and development without constantly rewriting foundational UI elements. Whether you are constructing a landing page, a dashboard, a documentation site, or a store, the toolkit supplies pre-styled elements and layouts that maintain design consistency out of the box. For developers and indie creators building modern web applications, the tool offers a structured path from prototyping to production. The open-source Once UI Core and available copy-paste blocks allow you to spin up user interfaces rapidly in React, Vite, React Router, or Next.js via dedicated adapters. Meanwhile, the Pro tier extends these capabilities with commercial use licenses for templates and Stack surfaces, alongside tools like Orbit Core. While the system uses a unique syntax that requires some adjustment if you are deeply accustomed to traditional Tailwind or standard component setups, it provides a cohesive foundation for developers aiming to ship production-ready applications with minimal initial boilerplate.

Key Use Cases

💻
Build applications using pre-styled React components
Frontend Developer
Deploy functional UI layouts quickly using modular blocks and native integration adapters for Next.js and other React environments.
100+ blocks
🎨
Maintain design consistency from Figma to code
UI Designer
Utilize the official Figma library for branding, prototyping, and layout planning before writing production code.
Figma library
✓ Pros
Open-source core is free under MIT
Combines React components with a Figma design library
Includes templates for landing pages, dashboards, and other surfaces
Flexible setup compatible with multiple React frameworks
Active community support on Discord
· Cons
Unique syntax takes time to learn if coming from Tailwind
Free templates are restricted to personal use
Advanced surfaces and commercial template usage require a paid plan
Documentation and ecosystem rely heavily on modern React stacks
⚡ Editorial Verdict

Once UI 2.0 offers a comprehensive ecosystem of design files, UI blocks, and multi-surface templates that accelerate frontend development in React. However, its distinct syntax and styling approach require a learning curve if you are already comfortable with standard component libraries or Tailwind CSS.

Questions & Answers

Frequently asked questions

Is Once UI available for Next.js only?

+
No. Once UI is a React design system that runs in any React application, including Vite, React Router, Next.js, or custom setups.

Is Once UI free to use?

+
The Once UI Core and 100+ blocks are free and open-source under the MIT license. Paid plans add commercial use rights for templates and additional surfaces.

Last reviewed:

Plans & Pricing

Once UI 2.0 pricing and plans

Free
$0
Includes Once UI Core, Figma library, 3 free templates, and 100+ copy-paste blocks.
Get Started Free

Prices and features are updated regularly but can change at any time — always confirm on the official website. Some links on this page are affiliate links.

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AI Directory

About Once UI 2.0

Full Description

Once UI 2.0 is an open-source design system built for React and Figma, offering a flexible style framework and modular components. It provides deployment-ready products and templates across seven surfaces like landing pages, dashboards, and documentation apps.

Editorial Verdict

Once UI 2.0 offers a comprehensive ecosystem of design files, UI blocks, and multi-surface templates that accelerate frontend development in React. However, its distinct syntax and styling approach require a learning curve if you are already comfortable with standard component libraries or Tailwind CSS.

Last reviewed:
Disclaimer
Zekai is an independent AI tools directory. We are not affiliated with, endorsed by, or officially connected to Once UI 2.0 unless clearly stated. All product names, logos, and brands are the property of their respective owners and are used for identification purposes only. The information on this page — including pricing, features, and availability — is general information, may have changed since our last review, and is not professional advice. Zekai Scores and verdicts are our editorial opinion. Some outbound links are affiliate links that may earn us a commission at no extra cost to you. Spotted outdated or incorrect information? Request a correction →
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