UI Components

5 open source tools compared. Sorted by stars — scroll down for our analysis.

Tool	Stars	Velocity	Language	License	Score
Lucide Beautiful and consistent icons	21.8k	+207/wk	TypeScript	—	69
flowbite	9.2k	+12/wk	HTML	MIT	75
Blazorise	3.5k	+3/wk	C#	—	61
ui	2.6k	+3/wk	TypeScript	MIT	70
HeadlessX	1.8k	+23/wk	TypeScript	MIT	65

Our Analysis

Lucide21.8k★

If you need icons for your web or mobile app and don't want to pay for a library or deal with bloated SVG files — Lucide is a community-maintained icon set with 1,500+ clean, consistent icons. It's a fork of Feather Icons that kept going after Feather stopped updating. Drop-in packages for React, Vue, Svelte, Angular, and vanilla JS. Fully free under ISC license. Every icon, every framework package, every future update — free. No premium tier, no pro icons behind a paywall. Tree-shakeable, so you only bundle the icons you actually use. The catch: Lucide's style is minimal and outline-based. If you need filled icons, duotone variants, or a wider style range, Tabler Icons or Heroicons might be a better fit. And at 1,500+ icons, it's comprehensive but not exhaustive — niche categories (finance, medical) have thinner coverage than Font Awesome's 30,000+ icons (though Font Awesome gates most behind their $99/year Pro tier).

flowbite9.2k★

A component library built on top of Tailwind CSS. If you're already using Tailwind and don't want to design every button, modal, dropdown, and navbar from scratch, Flowbite gives you pre-built components you can copy-paste into your project. The free version includes 56 component categories — navbars, cards, modals, forms, tables, alerts, and more. All built with Tailwind utility classes, so they match whatever custom Tailwind theme you've set up. Framework support covers React, Vue, Svelte, and vanilla HTML. Flowbite Pro ($149 one-time for personal, $299 for teams) adds 450+ advanced components, application UI blocks (dashboards, e-commerce layouts, admin panels), and Figma design files. That's where the real value is if you're building a full app. The catch: the free components are solid but basic. Once you need a data table with sorting, a complex dashboard layout, or an e-commerce checkout flow, you're either building it yourself or paying for Pro. Also, you're locked into Tailwind — if you ever move away from it, these components don't come with you. For a free alternative, consider shadcn/ui (React only) which gives you owned, customizable components rather than a library dependency.

Blazorise3.5k★

If you're a .NET developer building web apps with Blazor and you need UI components — data grids, forms, modals, charts, date pickers — Blazorise is a component library that wraps multiple CSS frameworks (Bootstrap, Bulma, Tailwind, Material) and gives you a consistent C# API across all of them. Write your components once, swap the CSS framework without rewriting code. 3.5K stars, growing slowly. This is niche — it's specifically for Blazor developers who want pre-built components without writing JavaScript. The Community tier is free and covers most basic components: buttons, forms, modals, tabs, progress bars, basic charts. The Professional tier ($499/year per developer) unlocks DataGrid, TreeView, Autocomplete, Charts Pro, and priority support. Enterprise ($999/year) adds source code access and dedicated support. The catch: the free tier is genuinely limited. The DataGrid — which is the component most apps need — is behind the paywall. That's a significant gap. The ecosystem is small compared to MudBlazor (free, open source alternative with more components). And Blazor itself is still a niche choice for web development, so community resources and third-party integrations are limited.

ui2.6k★

If you're building a web app with Tailwind CSS and want pre-built components that don't look like every other shadcn/ui project — Franken UI is a component library built on UIkit's design language but implemented as Tailwind CSS classes. It gives you a different aesthetic while staying in the Tailwind ecosystem. 2.5K stars, MIT license, TypeScript. Components include modals, dropdowns, tabs, accordions, sliders, navigation bars, and more. The design is clean and slightly more opinionated than shadcn/ui — closer to a cohesive design system than a collection of primitives. Fully free. No paid tier, no premium components. Install and use. The appeal is differentiation. If you've seen enough apps that look identical because they all use shadcn/ui with the same default theme, Franken UI gives you a distinct look without leaving Tailwind. The UIkit design language has its own personality. The catch: the community is small (2.5K stars vs shadcn's 80K+). Fewer examples online, fewer Stack Overflow answers, fewer templates. If you hit a problem, you're reading source code, not searching for solutions. And the component library is less comprehensive than shadcn/ui — check that the components you need exist before committing. For production apps where you want maximum community support, shadcn/ui is safer. For projects where looking different matters, Franken UI is worth trying.

HeadlessX1.8k★

If you're building a UI in React and want pre-built component logic without any styling — so you control every pixel of how it looks — HeadlessX provides unstyled, accessible components. Dropdowns, modals, tabs, accordions, all the interactive patterns you'd otherwise build from scratch, but with zero CSS opinions. 1.8K stars, growing at +23/week, MIT license, TypeScript. The 'headless' pattern means you get the behavior (keyboard navigation, ARIA attributes, focus management) and you bring the styles. Works with Tailwind, CSS Modules, styled-components, whatever. Fully free. No paid tier, no hosted version. Install the package and use the components. Solo through large teams: free at every scale. Headless UI libraries save the most time for teams with custom design systems — you get accessibility compliance without fighting pre-styled components. The catch: 1.8K stars is small for a component library. Radix UI (headless primitives by the Vercel/shadcn ecosystem) has 16K+ stars and a much larger community. Headless UI by Tailwind Labs is another established option. HeadlessX is emerging and the component coverage may not match the established players. Check that it has the specific components you need before committing — an incomplete headless library means you're mixing sources or building the gaps yourself.