9 Best CSS UI Kits and Component Libraries for 2025

Finding the right CSS UI kit or component library can save hours of design and development time. Whether you're building dashboards, admin panels, or full-scale applications, a well-crafted UI kit provides ready-to-use styles, responsive layouts, and consistent UI patterns.

In this guide, we’ve rounded up 9 of the best CSS UI kits and component libraries in 2025, helping developers and designers move faster without sacrificing quality.

1. UI Bakery

UI Bakery is more than a low-code platform – it also offers a design system that includes customizable UI components built with clean CSS. It’s tailored for enterprise-grade internal tools and comes with advanced theming options.

Key features:

• Customizable CSS-based UI kits
• Drag-and-drop interface with code export
• Supports dark mode and responsive design
• Built-in design system for consistency

Pricing: Free plan available, paid plans start at $5/month.

2. Tailwind UI

Built by the creators of Tailwind CSS, Tailwind UI offers beautifully designed components using utility-first CSS. It’s ideal for developers already using Tailwind in their projects.

Key features:

• Dozens of components for dashboards, forms, modals, and more
• Copy-paste-ready code
• Fully responsive and mobile-first
• Easily themeable via Tailwind config

Pricing: One-time payment starting at $149.

3. Bootstrap

One of the most popular CSS frameworks, Bootstrap includes a full UI kit and responsive grid system. Great for quick prototypes and production apps alike.

Key features:

• Extensive component library
• Responsive grid and utility classes
• Built-in themes and customizability
• Strong community and documentation

Pricing: Free and open-source.

4. Material UI (MUI)

A powerful React component library that implements Google’s Material Design system. MUI comes with CSS-in-JS styling and extensive customization.

Key features:

• Rich set of ready-made components
• Custom themes with CSS overrides
• Accessibility built-in
• Perfect for React apps

Pricing: Free with paid components and themes available.

5. Bulma

Bulma is a modern CSS framework based on Flexbox. It’s clean, modular, and great for quick layouting with semantic class names.

Key features:

• Fully CSS-based with no JS required
• Mobile-first and responsive
• Easy to learn and lightweight
• Great documentation and ecosystem

Pricing: Free and open-source.

6. Chakra UI

Chakra is a modular component library for React. It uses style props and supports both CSS and CSS-in-JS patterns.

Key features:

• Themeable components
• Built-in accessibility
• Simple API with composability
• Focused on developer ergonomics

Pricing: Free and open-source.

7. Ant Design

Ant Design is a comprehensive UI library built for enterprise React applications, with strong design consistency and robust CSS styling.

Key features:

• Extensive component library
• Internationalization support
• CSS-based theming and overrides
• Ideal for dashboards and admin apps

Pricing: Free and open-source.

8. Clarity Design System

Created by VMware, Clarity is a well-structured design system and UI library for enterprise apps.

Key features:

• Strong design guidelines
• CSS and Angular components
• Focus on UX and accessibility
• Rich datagrid and form support

Pricing: Free and open-source.

9. Halfmoon

Halfmoon is a front-end framework with a built-in UI kit and optional JavaScript components.

Key features:

• Supports both CSS and JS
• Dark mode ready
• Responsive grid system
• Easy to customize

Pricing: Free and open-source.

Wrapping up

Choosing the right CSS UI kit or component library can make or break your project’s speed and visual consistency. From utility-first options like Tailwind UI to full-fledged platforms like UI Bakery, there's something for every workflow and stack.

Want to skip the manual UI setup altogether? Try UI Bakery to build internal tools with pre-styled components and full customization – no CSS headaches required.