Ten Design System Examples in 2026 to Inspire Your Own

Whether you are starting your own design system or looking for inspiration, these ten public design systems are the ones worth studying in 2026.

Most roundups of this kind name the same handful of systems from the largest technology companies. Those are worth a look, and they are also the least useful comparison for almost everyone reading. A system maintained by a hundred people at a company with unlimited engineering is not a model you can copy. The ten below are all publicly readable, and most are maintained by teams closer to the size of yours.

What is a design system, and why should I have one?

A design system is a single source of truth for the reusable building blocks a team uses to create a product: components, tokens, patterns, and the rules for using them. Despite the name, it is not only for designers. It serves product managers, developers, marketers, and anyone whose work touches the interface.

For a fuller explanation, read our article on what is a design system.

Each entry below covers what the system is known for and what you can take from it.

1. Mews Design System

Mews builds hospitality software, and its design system has been through the arc most teams recognise. It started in 2017 as Mews UI, grew organically as a way to consolidate components in one place, then got rebuilt as the company scaled and the original structure stopped holding. The documentation describes it as an inner-sourced platform, maintained by a community of contributors rather than a single owner.

What to steal: the decision to rebuild rather than patch. Most systems reach a point where the structure, not the components, is the problem, and Mews is a public record of a team acting on that.

2. Aero (Air France and KLM)

Aero describes itself as the multi-brand design system for Air France-KLM, and it is published separately at Air France and KLM. Open both and you can compare them directly, which is a rare thing to be able to do from the outside. The structure separates a global foundation of typography, icons and tokens from platform-specific components.

What to steal: the split between global foundation and brand layer. If you are working out which decisions belong to the shared system and which belong to a brand, this is the clearest public example available.

3. Acorn (Firefox)

Acorn covers Firefox on desktop as well as the iOS and Android browsers, and it is written for an unusual audience: the employees, contributors and volunteers who work on Firefox. That constraint shows in how much of it explains reasoning rather than assuming shared context.

What to steal: documentation written for people who do not sit next to you. If your system has contributors outside the core team, Acorn is the model for how much you need to spell out.

4. Pajamas (GitLab)

Pajamas is built in the open, in keeping with GitLab's wider handbook culture. It splits cleanly into brand and product, and links straight out to the issue tracker, repository, Storybook and Figma kit from the homepage, so the path from reading the docs to contributing is one click.

What to steal: the transparency. Publishing the decision process, and the route to contribute, is what turns a component library into something teams trust.

5. Nucleus (Productboard)

Nucleus is a mid-size B2B product system, which makes it a more honest benchmark than anything maintained by a company with a dedicated platform org.

What to steal: the scope. It is close to what a small design system team can actually build and keep current, which is the constraint most readers are working under.

6. Backpack (Skyscanner)

Backpack covers web, iOS, and Android from a single system, published under Apache 2.0 and actively maintained on GitHub. It carries dedicated sections for accessibility and localisation, which matters for a product used in dozens of languages.

What to steal: cross-platform parity. Backpack is a realistic model for a mid-size product team supporting several platforms without a large dedicated system team.

7. Garden (Zendesk)

Garden is accessibility-led and openly published under Apache 2.0, with components in active development. It is a good size to learn from, large enough to be complete and small enough to read end to end.

What to steal: the readability. You can get through Garden in an afternoon and come away with a clear picture of how it is organised, which is not true of most systems this complete.

8. U.S. Web Design System

USWDS exists to make federal websites accessible and consistent, and accessibility is treated as a requirement rather than a section. Every component carries its accessibility behaviour alongside its markup, and the guidance sits beside the code rather than in a separate standard.

What to steal: accessibility documented per component. It is the difference between a team meeting a standard and a team hoping it did.

9. BBC Global Experience Language

GEL covers an unusually wide surface: web, mobile, television, and voice, for an audience spanning dozens of languages and a wide range of devices and connection speeds. Alongside the guidelines it publishes playbooks and articles about how the team works.

What to steal: the breadth. GEL is the best public example of a system that has to work outside ideal conditions.

10. Cedar (REI)

Cedar is REI Co-op's open-source design system, currently on its seventeenth major release. It is a useful counterweight to the software systems on this list, because retail carries a different set of problems: seasonal campaigns, a large catalogue, and a brand with a strong voice to protect.

What to steal: proof that this is not only a software company practice. If you are arguing for a design system outside a product org, Cedar is a public example that helps.

The thing every system on this list has in common

All ten were written for people to read. That was the right assumption when they were built, and it is now an incomplete one.

When an engineer asks Claude Code or Cursor to build a settings page with your components, the agent needs to resolve your button to a specific component, a specific token, a specific variant and state. A well-written usage paragraph does not answer that. The agent fills the gap with a plausible guess, and the result looks correct in review while quietly drifting from the system.

This is the gap Supernova closes. It takes the design system you build on top of these examples and serves it as structured context an agent can query, generated from your system data rather than maintained separately as a copy that goes stale. Several of the systems above are built on Supernova, which is how I know their documentation well enough to recommend reading it.

How to use this list

Do not copy a system wholesale. The systems above were built for the products and organisations that made them, and their choices only make sense in that context.

Pick the one closest to your situation and study how it is documented. If you are a small team, Garden and Nucleus are the realistic models. If you support several platforms, read Backpack. If you are running two brands off one system, open Air France and KLM side by side. If you are trying to convince your organisation that governance matters, Pajamas is the argument.

Then check one thing about your own system: pick a component you use constantly and see whether every decision about it resolves to a value someone, or something, can retrieve without asking a person. Whatever cannot is where your next quarter of work is.