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The open-source stack,
curated by builders.

Tell us what you're building or what you need. We'll surface the right repo, with an honest take on whether to use it.

Filtered byTestingclear

Testing

4 repos

Vite-native unit test runner. ~13k stars. Faster than Jest, compatible API. Default for new Vite-based projects in 2026.

Testing

You are starting a new project on Vite or modernizing from Jest.

You are deep in a Jest codebase and migration cost is high — Jest still works.

vitest-dev/vitestView

microsoft

playwright

End-to-end browser testing. ~65k stars. Beat Cypress on speed, parallelism, and multi-browser support. Default for E2E testing in 2026.

Testing

You are writing E2E tests for a web app.

You only need unit tests — use Vitest.

microsoft/playwrightView

storybookjs

storybook

Component development environment. ~84k stars. Develop, test, and document components in isolation. Mostly used by larger teams with design systems.

TestingUI Components

You are maintaining a design system or have multiple developers building components in parallel.

You are a solo developer — overkill for most product work.

storybookjs/storybookView

microsoft

playwright

The browser automation library the rest of the scraping tools depend on. Direct API for when you want fine-grained control: stealth mode, anti-bot bypass, multi-context, headless or headed. Also doubl…

Scraping & CrawlingTesting

You want a single library that scrapes AND runs your E2E tests — one toolchain, two jobs.

You only need HTTP + HTML parsing (no JS execution) — Cheerio or BeautifulSoup will be 10x faster.

microsoft/playwrightView

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The open-source stack,curated by builders.

Testing

We'll add it in 60 minutes.

The open-source stack,
curated by builders.