ReUI is a component library for the user interface of web apps, built on shadcn/ui. shadcn/ui is a set of React components whose source code is copied into a project rather than installed as a closed package, and styled with Tailwind CSS, a framework of small utility CSS classes. The ReUI repository on GitHub belongs to Keenthemes.
The free part has 1,264 components in 87 categories. It adds 27 in-house primitives that standard shadcn/ui does not include, such as a Data Grid (a sortable, filterable table built on TanStack Table), an event calendar, a Gantt chart and a Kanban board, each in a Radix UI and a Base UI version. A developer copies a component into a React project or installs it from ReUI's registry. A hosted MCP server (Model Context Protocol, a standard way for AI coding agents to call outside tools) lets agents such as Claude, Codex and Cursor find and add components.
The components are open source under the MIT License. Paid tiers, sold for a one-time payment, add hundreds of ready-made blocks (whole screens such as dashboards or pricing pages), icons and templates.