React Cosmos
React Cosmos: An open-source workbench for exploring component states, previews, and props. Ranked #9 of 15 in Component Libraries Software by our editors (7.5/10); pricing: Free plan; best for react teams needing flexible fixture-driven workbenches.
At a glance
- Editor score7.5 / 10
- PricingFree plan
- Best forReact teams needing flexible fixture-driven workbenches
- Free planYes
- Paid fromFree
- Component documentationYes
- Founded2015
- Facts checked24 Sep 2026
Where it wins
- Fixtures make component states browseable and searchable.
- Interactive previews include responsive viewports and prop controls.
- Supports React Native, common bundlers, and static library export.
Where it doesn't
- Focused on isolated component development, not primarily UI documentation.
- Requires a self-hosted setup rather than a hosted deployment option.
- Support is through community resources and documentation.
Our verdict on React Cosmos
React Cosmos gives React developers a place to define, inspect, and exercise UI components independently of a full application. Its filesystem-based fixtures describe component states, which teams can browse in a fixture tree or find with fuzzy search. An interactive preview and controls for props and custom inputs make it useful for checking variations in context. It suits teams that want a flexible component workbench, from solo developers to larger organizations, and prefer an open-source tool they can self-host.
The workbench combines responsive viewport previews with fixture browsing and prop manipulation, so component behavior can be explored across defined states without making documentation the primary workflow. Static export turns the interactive component library into a shareable artifact. A plugin system can extend server and UI functionality. This focus is useful when component development and review are central needs; teams looking mainly to publish UI documentation may want a product oriented more directly around that job.
Ecosystem fit is a notable strength: React Cosmos supports Vite, Webpack, Next.js, Create React App, custom bundler setups, and React Native, including remote renderer support. The project is open source and free, with self-hosted deployment; its support channels are community and documentation. There are no paid tiers to compare, but teams should account for owning the self-hosted environment and relying on community-oriented support. Choose React Cosmos for fixture-led, isolated component work across varied React setups; look elsewhere if hosted deployment or documentation-first publishing is the priority.
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React Cosmos pricing
React Cosmos fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Component documentation | Yes |
| Visual workbench | Yes |
| Framework support | React, React Native, Vite, Webpack, Next.js, Create React App, custom setups |
| Deployment options | Self-hosted |
| Version history | Not verified |
| Access controls | Not verified |
| Deployment | Self-hosted |
| Platforms | Web |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 6 integrations: Vite, Webpack, React Native, Next.js, Create React App, Custom bundler setups |
| Pricing | Free plan |
| Website | reactcosmos.org |
| Facts checked | 24 Sep 2026 |
React Cosmos integrations
React Cosmos lists 6 integrations on its own site.
- Vite
- Webpack
- React Native
- Next.js
- Create React App
- Custom bundler setups
Alternatives to React Cosmos
- SupernovaA design system hub linking Figma inputs, documentation, assets and code delivery.8.8
- KnapsackA governed design-system platform for teams coordinating multiple frameworks and workflows.8.6
- Ant Design IconsA free, open-source SVG icon library with packages for major frontend frameworks.7.9
See all React Cosmos alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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