What is lighthouse built with?

Q: Which repos have a stack like lighthouse's?

The ones that share most of its stack: RSSNext/Folo, bluesky-social/social-app, and excalidraw/excalidraw.

lighthouse is a JavaScript repo built with Preact. It stores its data in idb-keyval, watches its errors with Sentry, is tested with Jest, jsdom, testdouble, @testing-library/preact, Puppeteer, and 5 more, and uses Firebase. It has 142,901 written lines, with 506 test files.

Read on November 7, 2026, at commit ea58ed1. Read it as markdown

Frontend

The base 1

Preact17 files

Interface 1

enquirer1 file

Backend

Data 1

idb-keyval3 files

Services 2

Firebase1 file · viewer/app/src/firebase-auth.js, line 7
Sentry1 file · core/lib/sentry.js, line 60

Support

Testing 10

Jest24 files
jsdom16 files
testdouble14 files
@testing-library/preact11 files
Puppeteer10 files
expect5 files
jest-snapshot1 file
Mocha1 file
axe-core1 file
wait-for-expect1 file

Tools 3

TypeScript1 file
yargs1 file
chrome-launcher1 file

Other 12

http-link-header2 files
@formatjs/icu-messageformat-parser1 file
core-js1 file
intl-messageformat1 file
yargs-parser1 file
marky2 files
configstore1 file
debug1 file
mime-types1 file
open1 file
pako1 file
robots-parser1 file

Other repos with a similar stack

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

RSSNextFolo
39.2k
🧡 Folo is the AI RSS Reader
3 of 30 in common · TypeScriptCompare →
bluesky-socialsocial-app
18.4k
The Bluesky Social application for Web, iOS, and Android
3 of 30 in common · TypeScriptCompare →
excalidrawexcalidraw
135.1k
Virtual whiteboard for sketching hand-drawn like diagrams
2 of 30 in common · TypeScript
koala73worldmonitor
90.2k
Real-time global intelligence dashboard. AI-powered news aggregation, geopolitical monitoring, and infrastructure tracking in a unified situational awareness interface
2 of 30 in common · TypeScript
twentyhqtwenty
60.5k
The open alternative to Salesforce, designed for AI.
2 of 30 in common · TypeScript
TryGhostGhost
55.7k
Independent technology for modern publishing, memberships, subscriptions and newsletters.
2 of 30 in common · TypeScript

Frequently asked questions

What language is lighthouse written in?

lighthouse is written in JavaScript, with 142,901 written lines.

What framework does lighthouse use?

lighthouse is built with Preact.

What database does lighthouse use?

lighthouse stores its data in idb-keyval.

What services does lighthouse use?

lighthouse watches its errors with Sentry and uses Firebase.

The proof: core/lib/sentry.js, line 60

Does lighthouse have tests?

Yes. lighthouse has 506 test files and is tested with Jest, jsdom, testdouble, @testing-library/preact, Puppeteer, expect, axe-core, jest-snapshot, Mocha, and wait-for-expect.

Which repos have a stack like lighthouse's?

The ones that share most of its stack:RSSNext/Folo bluesky-social/social-app excalidraw/excalidraw