Dev tools · alternatives · 2026

24 alternatives to Cosmos 3.0

Dev tool for creating reusable React components

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Cosmos 3.0 launched in 2017; newer entries below may have overtaken it.

1. 1
   React Cosmos 5▲105

   A tool for ambitious UI developers

   2019 · reactcosmos.org · its alternatives →

2. 2
   Cosmos Video 3.0▲458

   A meetings tool to create visibility & a sense of belonging

   2022 · cosmos.video · its alternatives →

3. 3
   react.dev▲543

   The new home for React and its documentation

   2023 · react.dev · its alternatives →

4. 4
   Airbnb React Sketch.app▲745

   Render React components to Sketch for design systems

   2017 · react-sketchapp.airbnb.tech · its alternatives →

5. 5
   21st.dev▲1,211

   I originally built this app to organize and reuse interesting React + Tailwind components I came across on Twitter, inspired by the shadcn/ui approach. Later, a friend started contributing their own components, and it got me thinking—this could grow into something bigger, like an NPM for design engineers to share and use components. Would love to hear your thoughts!

   2025 · 21st.dev · its alternatives →

6. 6
   ReactAI▲440

   Open source free AI react components builder

   2024 · its alternatives →

7. 7
   React Scan▲385

   Scan your React app for problematic renders and performance

   2024 · react-scan.com · its alternatives →

8. 8
   React Boilerplate 3.0▲370

   Offline-first, highly scalable foundation for your next app

   2016 · github.com · its alternatives →

9. 9
   React Proto▲313

   React application design and prototyping tool

   2018 · react-proto.github.io · its alternatives →

10. 10
    v0.dev by Vercel▲549

    Generate UI with simple text prompts: copy, paste, ship

    2023 · v0.app · its alternatives →

11. 11
    refine.new▲462

    100% open-source React framework to build web apps

    2023 · its alternatives →

12. 12
    Compositor Lab▲210

    React UI component design tool

    2017 · compositor.io · its alternatives →

13. 13
    UI Components▲325

    Reusable React components to build apps with Auth0

    2024 · auth0.com · its alternatives →

14. 14
    Antd – A set of high-quality React components▲507

    Following the Ant Design specification, we developed a React UI library antd (Pronunciation) that contains a set of high quality components and demos for building rich, interactive user interfaces.

    2016 · ant.design · its alternatives →

15. 15
    PoemKit▲82

    React toolkit for fast web design and development

    2021 · github.com · its alternatives →

16. 16
    React Rainbow Components▲327

    Build your web application in a snap.

    2019 · react-rainbow.io · its alternatives →

17. 17
    refine▲236

    Open Source React Framework

    2021 · github.com · its alternatives →

18. 18
    UI Builder for shadcn/ui▲242

    React component for a visual way to create UIs

    2024 · github.com · its alternatives →

19. 19
    Quarkly▲184

    Design tool to create sites & web apps on React

    2020 · quarkly.io · its alternatives →

20. 20
    ReacType 9.0▲81

    React prototype tool with router and state management

    2021 · its alternatives →

21. 21
    Wasp-lang (Beta)▲226

    Develop web apps in React & Node.js with no boilerplate

    2022 · wasp.sh · its alternatives →

22. 22
    Forge▲66

    A complete React toolkit made for AI

    May 2026 · forge.webba-creative.com · its alternatives →

23. 23
    ReacType▲91

    Prototyping Tool Exporting React / Typescript Applications

    2019 · github.com · its alternatives →

24. 24
    Nucleus UI▲187

    Free UI component library to create mockups in Figma quickly

    2021 · nucleus-ui.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →