Jest Is Plateauing. Here's What 14M Developers Chose Instead.

Vitest hit 14 million weekly downloads in early 2026. Two years ago, it was under 4 million. Meanwhile, Jest — still the most downloaded test runner at 32 million/week — has plateaued. I track these trends on PkgPulse , a tool I built to compare npm packages with real health data. The JavaScript testing landscape has shifted, and the data tells a clear story. Here's where every major testing framework stands. Originally published on pkgpulse.com The Testing Stack in 2026 Before diving into individual comparisons, here's the modern testing pyramid: Layer What It Tests Recommended Framework Unit Functions, hooks, utilities Vitest Component UI components in isolation Vitest + Testing Library Integration Multiple modules working together Vitest E2E Full user flows in a real browser Playwright The 2026 default stack: Vitest for everything below the browser, Playwright for everything in it. Unit Testing: Jest vs Vitest This is the comparison most teams are evaluating right now. Metric Jest V