Radix UI vs Base UI

A detailed comparison of Radix UI and Base UI, two headless React UI libraries. Radix UI offers structured, production-ready components with strong accessibility defaults and a consistent API, making it ideal for building SaaS apps and dashboards quickly. Base UI takes a primitive-first, behavior-only approach giving developers full control over DOM structure, styling, and composition — better suited for component registries, custom design systems, and animation-heavy interfaces. The post includes code examples showing how each library handles dialogs and close button customization, and explains why Shadcn Space chose Base UI to enable dependency-light, fully editable, copy-paste components.