HeroUI

HeroUI, previously known as NextUI, is an open source component library for building React web applications and React Native mobile apps. Version 3 of the web library combines React Aria Components with Tailwind CSS v4 to deliver accessible behavior, typed APIs, composable parts and polished default styling that developers can adapt to their own design system. It positions itself as a modern alternative to libraries such as MUI, Chakra UI and shadcn/ui, and a separate HeroUI Native package covers mobile. The documentation covers installation, component APIs, examples, theming, migration guidance and an official command line tool. It is also written with coding agents in mind: generated llms.txt indexes, documentation available as markdown, a public Docs Agent API with an OpenAPI specification, and MCP packages for both HeroUI React and HeroUI Native let AI coding assistants read the same public docs. The site states these resources do not require a paid plan. HeroUI is aimed at front end developers and product teams who want ready made inputs, selects, dialogs, charts and layout components without giving up control of the source. Teams can inspect the code, use the free packages and customize each component. A paid Pro offering adds ready made templates such as dashboard, mail, chat, finances and CRM layouts. The core libraries are free and open source. The site shows a Pro tier and mentions a free trial for it, but no pricing page was readable, so Pro prices are not stated here and should be checked with the vendor.