mui/base-ui

Unstyled UI components for building accessible web apps and design systems. From the creators of Radix, Floating UI, and Material UI.

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Summary Information

Updated 14 seconds ago
Type:Library / SDKCategory(s):UI Components & Design SystemsWeb Development
Added to GitGenius on September 5th, 2026
Created on February 23rd, 2024
Open Issues & Pull Requests: 478 (+0)
GitHub issues: Enabled
Number of forks: 571
Total Stargazers: 11,130 (+0)
Total Subscribers: 33 (+0)

Repository Insights (GitGenius)

Median issue/PR response: 7.9 hours
Mean response time: 14.3 days
90th percentile: 22.6 days
Tracked items: 1,483

Maintainer activity

21 people did triage or write work on this repository in the last 12 months.

Counts unlabeled, assigned, unassigned, milestoned, demilestoned, locked, unlocked over the last 12 months. These are issue and pull request events that require triage or write permission. Commits and code review are not counted. labeled and renamed are excluded because GitHub issue forms record the issue author as the actor. Figures from October 11, 2026. This count is not comparable across projects: each project's automation decides which of these events a person emits.

How this project is maintained

About 9% of issues opened in the past year have never received a reply. 72% of open issues come from outside the core team, so the backlog reflects real-world use rather than internal planning. Work labelled "has workaround" is answered fastest, typically in about 4 hours, while "type: new feature" waits about 2 days. 65% of tracked open issues have had no activity in three months, so the open count overstates what is actively being worked. 71% of issues opened in the past year have been closed, leaving a working backlog.

Charts & Analytics

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Issue Activity (beta)

Open issues: 327
New in 7 days: 12
Closed in 7 days: 8
Avg open age: 294 days
Stale 30+ days: 296
Stale 90+ days: 219

Recent activity

Opened in 7 days: 10
Closed in 7 days: 8
Comments in 7 days: 9
Events in 7 days: 42

Top labels

  • type: bug (455)
  • type: new feature (196)
  • docs (163)
  • component: select (159)
  • scope: all components (148)
  • component: combobox (141)
  • type: enhancement (132)
  • component: menu (129)

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Detailed Description

Base UI is a collection of unstyled React components for building accessible web applications and design systems.

The project addresses the need for low-level, accessible component primitives that developers can style freely without fighting against built-in design decisions. It provides components with WAI-ARIA compliance and keyboard navigation already implemented, allowing teams to apply their own visual design while inheriting battle-tested accessibility patterns. The components are intentionally minimal, exposing hooks and composition patterns that let developers control rendering and behavior.

Base UI suits teams building custom design systems or applications with specific visual requirements who want accessibility guarantees without the overhead of removing unwanted styles from opinionated component libraries. It works well for projects where design consistency matters but must be achieved through custom styling rather than adopting a pre-built theme. The project is created by the same authors behind Radix, Floating UI, and Material UI, bringing experience from multiple approaches to component design.

The project maintains active development with regular updates to components and accessibility features. Bug reports and feature requests receive consistent attention and discussion. The codebase shows ongoing refinement of component APIs and documentation to improve developer experience. Maintenance activity demonstrates commitment to keeping the library current with React patterns and accessibility standards.