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Cosscom UI

Cosscom UI is a free, open-source UI component library built with React, Next.js and Tailwind CSS. Coss.com/ui is the official design system of Cal.com. It has 10,763 GitHub stars and is released under the AGPL-3.0 license. A live demo is linked from this page.

github.com/cosscom/ui (opens in a new tab)

Data as of from the GitHub API; description from the project's repository. Report an error

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Get started

Copy the files into a new folder with degit (no git history), or clone the repository with git.

Copy with degit
npx degit cosscom/ui my-ui
cd my-ui
npm install   # then run the dev script from the README
Or clone with git
git clone --depth 1 https://github.com/cosscom/ui.git my-ui

Sources: GitHub docs on template repositories, degit.

About Cosscom UI

coss.com/ui is the official Cal.com Design System. This repository contains multiple products and applications that make up the coss.com ecosystem:

Built with

  • React
  • Next.js
  • Tailwind CSS
  • shadcn/ui
  • TypeScript
GitHub preview card for cosscom/ui
GitHub social preview of cosscom/ui. Open the live demo for the real design.

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FAQ

Cosscom UI FAQ

Still curious? Email info@appsgit.com.

How do I use Cosscom UI?

Copy the files into a new folder with npx degit cosscom/ui my-ui (no git history), or fork the repository on GitHub. Then follow the README for the install and dev commands.

Can I use Cosscom UI for commercial projects?

It depends on the AGPL-3.0 license. CC-BY licenses need visible attribution, GPL and AGPL licenses require sharing your changes under the same license, and other licenses have their own terms. Read the LICENSE file in the repository before shipping a client project.

Is Cosscom UI maintained?

The repository's most recent commit was on Oct 22, 2026. appsgit only lists templates from repositories with a commit in the last six months.