# Design Systems Maintained by Major Tech Companies: Enterprise UI Libraries Explained

> Explore enterprise UI libraries and design systems maintained by Google, Microsoft, Meta, and Amazon for scalable, consistent user interfaces. Discover component libraries and design tokens.

- Repository: [Alex Pate/awesome-design-systems](https://github.com/alexpate/awesome-design-systems)
- Tags: list
- Published: 2026-04-12

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**The world's largest technology firms—including Google, Microsoft, Amazon, and Meta—maintain open-source design systems that provide component libraries, design tokens, and strict accessibility standards for building consistent user interfaces at scale.**

The `alexpate/awesome-design-systems` repository curates a comprehensive index of interface libraries used across the software industry. Among the hundreds of entries documented in [`README.md`](https://github.com/alexpate/awesome-design-systems/blob/main/README.md), a distinct subset consists of battle-tested design systems maintained by major tech companies that power millions of user interactions daily. These enterprise-grade systems deliver production-ready React components, them