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What is bundlephobia built with?

bundlephobia is a TypeScript repo built with React, Next.js, Fastify, Koa, Vite, and 1 more. It uses AI through natural, connects to GitHub, makes its content with dompurify, remark, and strip-markdown, validates its data with Zod and validate-npm-package-name, is tested with @playwright/test, deploys with prom-client and winston, and uses lru-cache, Firebase, and MCP. It has 50,445 written lines, with 69 test files.

Read on November 14, 2026, at commit 2a7d5b6. Read it as markdown

The card says what it's built with. Its whole map opens it up: every part of the code and how it connects to the rest.

Frontend

The base 4

Styles 2

Interface 9

Icons 1

Backend

The base 2

Data 1

AI 1

  • natural1 file

Services 3

Support

Content 3

Validation 2

Testing 1

  • @playwright/test9 files

Deploy 2

Tools 8

  • npm-package-arg3 files
  • @contentful/rich-text-types1 file
  • @rspack/core1 file
  • JetBrains
  • esbuild-register2 files
  • pacote2 files
  • schema-dts1 file
  • asm

Other 29

  • Axios7 files
  • SemVer7 files
  • date-fns4 files
  • TanStack4 files
  • D32 files
  • got2 files
  • @amplitude/analytics-browser1 file
  • execa1 file
  • koa-send1 file
  • koa-static1 file
  • Lodash1 file
  • node-fetch1 file
17 more
  • debug9 files
  • dotenv-defaults7 files
  • performance-now6 files
  • org.jetbrains.kotlinx:kotlinx-serialization-json4 files
  • query-string3 files
  • truncate3 files
  • ts-invariant3 files
  • p-queue2 files
  • safe-stable-stringify2 files
  • workerpool2 files
  • debounce1 file
  • git-url-parse1 file
  • info.picocli:picocli1 file
  • koa-proxies1 file
  • npm-registry-fetch1 file
  • p-throttle1 file
  • unfetch1 file

Other repos with a similar stack

Ordered by how much of its stack they share with bundlephobia, then by stars.

Frequently asked questions

What language is bundlephobia written in?
bundlephobia is written in TypeScript, with 50,445 written lines.
What framework does bundlephobia use?
bundlephobia is built with React, Next.js, Fastify, Koa, Vite, and react-router-dom.

The proof: in package.json

Does bundlephobia use AI?
Yes. bundlephobia uses AI through natural.
What services does bundlephobia use?
bundlephobia connects to GitHub and uses lru-cache, Firebase, and MCP.

The proof: packages/library-discovery/cli.mjs, line 5

Does bundlephobia have tests?
Yes. bundlephobia has 69 test files and is tested with @playwright/test.
Which repos have a stack like bundlephobia's?
The ones that share most of its stack:strapi/strapiCherryHQ/cherry-studiocalcom/cal.diy

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