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Once UI 2.0 Review

Once UI 2.0 is an open-source design system for building modern web applications with Next.js, providing components and templates to streamline development.

shipped Sep 25, 2026image-generationfreemium
Domain rating77Monthly visits47/mo
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Once UI 2.0 — product screenshot

Why it matters

1Open-source design system for Next.js applications.
2Offers a freemium pricing model with a free 'Core' tier and a '$99/year' 'Pro' tier.
3Integrates with GitHub for development workflows.
4Provides flexible customization options and comprehensive documentation.

About Once UI 2.0

Business Model
Open Source
Platforms
Web
Target Audience
Web developers and designers focused on Next.js applications.

Pricing Plans

Once UI Core
Free
  • • Open-source design components
  • • Built for Next.js
  • • Community support
Once UI Pro
$99/year
  • • Premium components and templates
  • • Priority support
  • • Access to exclusive resources

Leadership

Creator of Dopler
GitHubOpen Source

Specs

API Available

Yes, public API

overview

What is Once UI 2.0?

Once UI 2.0 is an open-source design system tool that enables web developers and designers focused on Next.js applications to streamline development and enhance UI consistency. It provides a collection of components and templates specifically engineered for modern web application development within the Next.js ecosystem. The system emphasizes flexible customization options and comprehensive documentation, supporting rapid prototyping and efficient design system implementation. Once UI 2.0 operates on a freemium model, offering a free 'Core' version and a 'Pro' subscription for advanced features.

features

Key Features of Once UI 2.0

Once UI 2.0 provides a robust set of features designed to facilitate the development of Next.js web applications. Its core offering is an open-source design system, ensuring transparency and community contribution. The system is built with specific integration for Next.js, optimizing performance and developer experience within that framework. Users benefit from flexible customization options, allowing adaptation to various project requirements and branding guidelines. Comprehensive documentation supports developers in utilizing the system effectively, while its community-driven nature fosters continuous improvement and support.

  • Open-source design system for transparency and community collaboration.
  • Direct integration with Next.js for optimized web application development.
  • Flexible customization options to adapt components to specific project needs.
  • Comprehensive documentation for ease of use and developer support.
  • Community-driven development fostering continuous improvements and feature additions.

use cases

Who Should Use Once UI 2.0?

Once UI 2.0 is primarily targeted at web developers and designers who are building applications using the Next.js framework. Its structured approach and pre-built components are particularly beneficial for teams and individuals aiming to accelerate their development cycles and maintain high UI consistency across projects. The tool is suitable for various stages of development, from initial concept to full-scale deployment.

  • Web application development: Teams building modern web applications with Next.js seeking a consistent and efficient design system.
  • Rapid prototyping: Developers and designers looking to quickly build and iterate on user interfaces for Next.js projects.
  • Design system implementation: Organizations aiming to establish and maintain a unified design language across their Next.js-based products.

how to use

How to Use Once UI 2.0

To begin using Once UI 2.0, developers typically integrate the open-source design system into their existing or new Next.js projects. The process involves installing the necessary packages and then importing and utilizing the provided components and templates within their application's codebase. Detailed instructions are available through the comprehensive documentation.

  • 1Initialize a new Next.js project or navigate to an existing one.
  • 2Install Once UI 2.0 packages via npm or yarn.
  • 3Configure the design system within the Next.js application, following documentation guidelines.
  • 4Import and utilize Once UI 2.0 components and templates in React components.
  • 5Customize components using the provided flexible customization options.
  • 6Leverage GitHub for version control and collaborative development.

pricing

Once UI 2.0 Pricing & Plans

Once UI 2.0 operates on a freemium business model, offering both a free core version and a paid professional tier. The 'Once UI Core' tier provides access to the fundamental open-source design system and its components without any cost. For users requiring additional features and support, the 'Once UI Pro' tier is available at an annual subscription fee.

  • Once UI Core: Free (includes core open-source design system and components).
  • Once UI Pro: $99/year (offers additional features and enhanced support).

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Pros

  • +Specifically designed and optimized for Next.js applications.
  • +Open-source core provides transparency and community involvement.
  • +Offers pre-built templates alongside components, accelerating development.
  • +Provides flexible customization options for diverse project requirements.
  • +Comprehensive documentation supports ease of integration and use.

Cons

  • −Focus on Next.js may limit its direct applicability for other React frameworks.
  • −The 'Pro' tier requires an annual subscription for advanced features.
  • −May have a smaller component ecosystem compared to more general React libraries like Mantine.
  • −Requires manual integration and updates for raw component control, unlike shadcn/ui's approach.

Policies

Pricing Page

View Pricing→

Similar Tools

Once UI 2.0 vs Competitors

Once UI 2.0 competes within the ecosystem of React and Next.js component libraries and design systems. Its primary differentiation lies in its specific focus on Next.js applications and its provision of pre-built templates alongside components.

1
Chakra UI↗

It provides a set of accessible, modular, and customizable React components that simplify building user interfaces with a focus on developer experience.

Chakra UI offers a broader ecosystem and community support compared to Once UI 2.0, but might require more manual setup for Next.js-specific templates and integrations, as its focus is more general React.

2
Mantine↗

Mantine is a comprehensive React component library that includes a wide range of hooks, components, and a theming system, with built-in support for dark mode and extensive customization.

Mantine provides a very extensive set of components and hooks, potentially offering more out-of-the-box functionality than Once UI 2.0, but its focus is broader than just Next.js, meaning less opinionated Next.js-specific templates.

3

It's not a component library but a collection of re-usable components that you copy and paste directly into your project, giving you full control over the code and dependencies.

Unlike Once UI 2.0 which is a traditional library, shadcn/ui gives you the raw component code, offering maximum customization and no dependency on a library's versioning, but requires more manual integration and updates rather than a pre-packaged design system.

4
NextUI↗

Built with React, Tailwind CSS, and Framer Motion, it offers beautiful, modern, and customizable components specifically designed for Next.js applications with a focus on performance and developer experience.

NextUI is highly optimized for Next.js and integrates seamlessly with Tailwind CSS, similar to Once UI 2.0's modern web app focus, but its component set and design language might differ, and it may offer fewer pre-built page templates.

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