Vitest vs Jest 2026: Which Testing Framework Should You Use?

If you're starting a new frontend project in 2026, you've probably asked yourself: Vitest or Jest? I've been using both on production projects for years. My short answer: Vitest for new Vite/modern projects, Jest for legacy or large enterprise codebases . But the full picture is more nuanced — let me break it down. At a Glance: Vitest vs Jest Feature Vitest Jest Speed Up to 10x faster (HMR + native ESM) Slower cold start, but mature Config Zero-config with Vite projects Requires transform config for ESM TypeScript Native TS support Needs ts-jest or Babel Compatibility Jest-compatible API N/A Ecosystem Growing fast Massive, battle-tested Watch mode Instant re-run via Vite HMR Slower full re-run Browser testing Vitest Browser Mode (Playwright) jsdom only Snapshot testing Supported Supported Coverage v8 / istanbul istanbul Speed: Vitest Wins — and It's Not Close The biggest reason devs switch to Vitest is speed . Vitest reuses your Vite dev server's transform pipeline, which means: ESM mo