Source: https://seerepo.com/compare/tailwindlabs/tailwindcss/vs/vercel/next.js
Markdown source: https://seerepo.com/compare/tailwindlabs/tailwindcss/vs/vercel/next.js.md
Description: tailwindcss and next.js share 3 technologies: tracing, tracing-subscriber, and PostCSS. tailwindcss is written in TypeScript and next.js in JavaScript.

# tailwindcss vs next.js

tailwindcss and next.js share 3 technologies: tracing, tracing-subscriber, and PostCSS. tailwindcss is written in TypeScript and next.js in JavaScript.

- [tailwindlabs/tailwindcss](https://seerepo.com/r/tailwindlabs/tailwindcss): A utility-first CSS framework for rapid UI development.
- [vercel/next.js](https://seerepo.com/r/vercel/next.js): The React Framework

## What they share and what sets them apart

- In common: tracing, tracing-subscriber, PostCSS
- Only in tailwindcss: H3, Vite, log, lightningcss, postcss-import, tailwindcss, postcss-selector-parser
- Only in next.js: React, Express, concurrent-queue, Tokio, scheduler, Next.js, react-server-dom-webpack, styled-jsx, emotion, Tailwind CSS, geist, MUI, react-virtualized, Framer, Headless UI, @heroicons/react, Lucide, Cheerio, js-yaml, image, sharp, prop-types, Ajv, OpenTelemetry, pino, class-variance-authority, next-themes, tailwind-merge, Radix UI, cmdk, prompts, Sass

## Side by side

| | tailwindcss | next.js |
|---|---|---|
| Size | 165,694 lines written, 231 code files | 2,391,614 lines written, 5,697 code files |
| Who writes it | 0.2% of its commits signed by AI. With Claude Code, CodeRabbit, and Codex | 0.8% of its commits signed by AI. With Claude Code, Cursor, GitHub Copilot, and Devin |
| Activity | Last push November 2, 2026, 6,086 commits, 98,062 stars | Last push November 4, 2026, 36,392 commits, 143,262 stars |
| Tests | 137 test files. 36.4% of its code files have a test that imports them | 18,587 test files. 6.5% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, tailwindcss or next.js?

next.js, with 2,391,614 lines written; tailwindcss has 165,694.

The proof: [vercel/next.js's code at commit 97f1a2c](https://github.com/vercel/next.js/tree/97f1a2c8a1deb23cf03855d67f942c0fe3ded1ce)

### Which has more GitHub stars, tailwindcss or next.js?

next.js, with 143,262 stars; tailwindcss has 98,062.

The proof: [vercel/next.js on GitHub](https://github.com/vercel/next.js)

### Which has more tests, tailwindcss or next.js?

next.js, with 18,587 test files; tailwindcss has 137.

The proof: [vercel/next.js's code at commit 97f1a2c](https://github.com/vercel/next.js/tree/97f1a2c8a1deb23cf03855d67f942c0fe3ded1ce)

### Which was updated more recently, tailwindcss or next.js?

next.js: its last push was on November 4, 2026, and tailwindcss's on November 2, 2026.

The proof: [vercel/next.js's commits on GitHub](https://github.com/vercel/next.js/commits)

### Which has more commits signed by AI, tailwindcss or next.js?

next.js: an AI signed 0.8% of its commits, with Claude Code, Cursor, GitHub Copilot, and Devin; in tailwindcss, 0.2%.

The proof: [the commits each tool signed in vercel/next.js](https://seerepo.com/r/vercel/next.js/ai)

## Sources

- tailwindlabs/tailwindcss: Read on November 4, 2026, at commit 2626ae6 (https://github.com/tailwindlabs/tailwindcss/tree/2626ae6ceddf36069ab6d55c53a5857c1e2e360a)
- vercel/next.js: Read on November 4, 2026, at commit 97f1a2c (https://github.com/vercel/next.js/tree/97f1a2c8a1deb23cf03855d67f942c0fe3ded1ce)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.