Material UI v9: A React component library that commits to Material Design 2

What Material UI solves and who it targets

The library is not for everyone. If you need only a few styled primitives, or if you want a library that follows the latest Material Design 3 guidelines, Material UI may be the wrong fit. The README links to Material Design 2 (m2.material.io) as the reference, so the components are tied to that design language. Teams that need a more minimal or more current aesthetic will have to override a lot of default styling, which can be more work than starting with a blank slate.

How the library is structured and extended

The library also includes a theming system, though the README does not detail it. The documentation, which is linked but not included, is the primary source for theming. You will need to consult the docs to understand how to customize colors, typography, and spacing. The README does point to a collection of example projects, which can help you see the patterns in practice.

Getting started: installation and first steps

One concrete step is to pick a version. The latest stable release is v9.5.0 (2026-10-09), followed by v10.0.0-alpha.0 (2026-10-12), and there are upgrade guides for v5 to v6 and v4 to v5. The README lists older versions with links, so you can see that v5.x is still documented separately. If you are coming from v4, you have a migration path, but it is not trivial. The upgrade guides are there for a reason: major version bumps in Material UI have historically changed APIs and theming approaches. You should plan for that cost when you adopt the library, not assume that a future upgrade will be seamless.

The cost of major version upgrades

The release cadence is active. The recent releases are v9.4.0 on 2026-08-28, v9.5.0 on 2026-10-09 and v10.0.0-alpha.0 on 2026-10-12. It means you get bug fixes and new features quickly, but it also means you need to keep up with changelogs to avoid surprises. The README links to a regularly updated changelog, which is the right place to track those changes. If your team prefers a slow-moving dependency, this pace may be a drawback.

Licensing and sponsor model

The security policy is mentioned in the README, with a link to the security policy page. That page is the place to find supported versions and contact information for reporting vulnerabilities. The README does not state which versions are currently supported, so you should check that page before you adopt an older version. If you are on v4, you may be outside the security support window, which is a risk.

Where Material UI is the wrong tool

A third case is a team that wants to avoid the MUI ecosystem's commercial push. The README's prominent sponsor list and the MUI Store link show that the project is a business, not just a community effort. That is not a problem in itself, but it means the roadmap may be influenced by commercial interests. If you prefer a purely community-driven library, you should look elsewhere.

Alternatives and how they differ

There is also the option of using the new Material Web Components from Google, but that is not a React library. The key difference is that Material UI is a React-specific implementation, so it integrates with React's state and lifecycle in a way that web components do not. If you are already committed to React, Material UI is a more natural fit than a framework-agnostic web component library.

What to verify before you commit

Also, check the security policy to see which versions are supported. The README links to it, but does not summarize it. If you are on an older version, you may be exposed. Finally, look at the examples directory in the repository. The README links to it, and it is the most direct way to see a working setup without having to dig through the docs. Those examples are the closest thing to a quick start that the README offers.

Editorial conclusion

Adopt Material UI if your team wants a mature, MIT-licensed React component library that follows Material Design 2 and you can accept the migration overhead between major versions. Do not adopt it if you need Material Design 3 components, or if you want a library with a smaller API surface and no legacy baggage. Before adopting, verify which version your dependencies expect, check the upgrade guides from v5 to v6 and beyond, and confirm that the components you need are in the core package rather than in the MUI X suite.

Frequently asked questions

Official sources

1. Official documentation
2. Official README
3. Project repository
4. Release notes