Source: https://seerepo.com/compare/aidenybai/react-scan/vs/vercel/next.js
Markdown source: https://seerepo.com/compare/aidenybai/react-scan/vs/vercel/next.js.md
Description: react-scan and next.js share 5 technologies: React, Tailwind CSS, tailwind-merge, prompts, and Cheerio. react-scan is written in TypeScript and next.js in JavaScript.

# react-scan vs next.js

react-scan and next.js share 5 technologies: React, Tailwind CSS, tailwind-merge, prompts, and Cheerio. react-scan is written in TypeScript and next.js in JavaScript.

- [aidenybai/react-scan](https://seerepo.com/r/aidenybai/react-scan): Scan and fix React performance issues
- [vercel/next.js](https://seerepo.com/r/vercel/next.js): The React Framework

## What they share and what sets them apart

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

## Side by side

| | react-scan | next.js |
|---|---|---|
| Size | 27,897 lines written, 122 code files | 2,391,614 lines written, 5,697 code files |
| Who writes it | 0.3% of its commits signed by AI. With Devin and Cursor | 0.8% of its commits signed by AI. With Claude Code, Cursor, GitHub Copilot, and Devin |
| Activity | Last push August 16, 2026, 707 commits, 21,883 stars | Last push November 4, 2026, 36,392 commits, 143,262 stars |
| Tests | 22 test files. 6.6% 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, react-scan or next.js?

next.js, with 2,391,614 lines written; react-scan has 27,897.

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

### Which has more GitHub stars, react-scan or next.js?

next.js, with 143,262 stars; react-scan has 21,883.

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

### Which has more tests, react-scan or next.js?

next.js, with 18,587 test files; react-scan has 22.

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

### Which was updated more recently, react-scan or next.js?

next.js: its last push was on November 4, 2026, and react-scan's on August 16, 2026.

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

### Which has more commits signed by AI, react-scan or next.js?

next.js: an AI signed 0.8% of its commits, with Claude Code, Cursor, GitHub Copilot, and Devin; in react-scan, 0.3%.

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

## Sources

- aidenybai/react-scan: Read on November 5, 2026, at commit 0fb3186 (https://github.com/aidenybai/react-scan/tree/0fb31862b697ef3ed2d8ed6990878a35a4ca8a75)
- 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.