EUI (Elastic UI Framework) is the open-source React component library behind Elastic's products, including Kibana, providing typed components, theme utilities, and static assets for building shared, on-brand web layouts.
It started as a folder of code inside Kibana before becoming an independent library, a concrete, traceable example of a design system emerging organically from one product rather than being planned top-down from scratch.
Developers building data-exploration or analytics tools who want a proven, typed React component library with strong unit test coverage to install directly.
It's genuinely open source and npm-installable, so it works as a real dependency, not merely a reference to study.
A React framework powering Elastic's internal products, with accessible components and shared foundations.
