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Related Products
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Once UI:
About
Once UI is an open source design system and component library built for Next.js (and paired with a matching design system in Figma), offering a flexible style system, 100+ ready-to-use UI components, and more than 75 copy-paste blocks to rapidly assemble web apps. It supports both simple static sites and more complex applications, thanks to pre-built, deployment-ready templates for portfolios, documentation sites, blogs, ecommerce stores, and dashboards (free and Pro versions). Once UI emphasizes “component-first” development, meaning developers don’t need to manually write utility-class-heavy styling (like with some CSS frameworks); instead, they use semantic variables and components that integrate design tokens for visual consistency. For creators used to tools like utility-class frameworks or component libraries, but who want faster development with fewer dependencies, Once UI simplifies building UIs without sacrificing design quality or accessibility.
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Radix UI:
About
Radix UI is an open source component library optimized for fast development, easy maintenance, and accessibility. It offers two main packages, Radix Primitives and Radix Themes. Radix Primitives is a low-level UI component library focused on accessibility, customization, and developer experience. Components adhere to WAI-ARIA design patterns, are unstyled by default, and provide full keyboard navigation. Radix Themes is a pre-styled component library designed to work out of the box with minimal configuration. It includes layout primitives, typography, and components like buttons and cards, all customizable via the Theme component. Radix Colors offers a comprehensive, accessible color system for designing beautiful, accessible websites and apps. It supports automatic dark mode, transparent variants, and is designed for user interfaces. Radix Icons provides a crisp set of 15×15 icons available as individual React components.
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Once UI:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Radix UI:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Once UI:
Audience
Independent developers, freelancers, startups and small teams searching for a tool to build polished web applications or websites quickly and consistently
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Radix UI:
Audience
React developers seeking a solution for building high-quality web applications
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Once UI:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Radix UI:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Once UI:
API
Offers API
Not Supported
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Radix UI:
API
Offers API
Not Supported
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Once UI:
Screenshots and Videos |
Radix UI:
Screenshots and Videos |
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Once UI:
Pricing
$128 per year
Free Version
Supported
Free Trial
Not Supported
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Radix UI:
Pricing
Free
Free Version
Supported
Free Trial
Not Supported
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Once UI:
Reviews/
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Radix UI:
Reviews/
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Once UI:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Not Supported
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Radix UI:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Once UI:
Company InformationOnce UI
United States
once-ui.com
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Radix UI:
Company InformationRadix UI
United States
www.radix-ui.com
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Once UI:
Alternatives |
Radix UI:
Alternatives |
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Radix UI:
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Radix UI:
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Once UI:
Categories |
Radix UI:
Categories |
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Once UI:
Integrations
CSS
Supported
Figma
Supported
Kibo UI
Not Supported
Next.js
Supported
Plate
Not Supported
React
Not Supported
Reflex
Not Supported
Shadcn Space
Not Supported
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Radix UI:
Integrations
CSS
Supported
Figma
Not Supported
Kibo UI
Supported
Next.js
Not Supported
Plate
Supported
React
Supported
Reflex
Supported
Shadcn Space
Supported
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Once UI:
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Radix UI:
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