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Jest vs Vitest
Trust Score comparison · March 2026
Signal Comparison
28M/wkWeekly npm downloads12M/wk
180GitHub commits (90d)280
44kGitHub stars14k
180kStack Overflow questions18k
ExcellentCommunity healthVery Active
JestVitest
Key Differences
| Factor | Jest | Vitest |
|---|---|---|
| License | MIT | MIT |
| Language | TypeScript / JavaScript | TypeScript |
| Hosted | Self-hosted | Self-hosted |
| Free tier | ✓ Yes | ✓ Yes |
| Open Source | ✓ Yes | ✓ Yes |
| TypeScript | ✓ | ✓ |
Pick Jest if…
- Testing JavaScript/TypeScript code — unit, integration, snapshot
- You need zero-config test setup with batteries included
- Working in a React/Next.js project (best ecosystem support)
Pick Vitest if…
- Your project uses Vite (Nuxt, SvelteKit, vanilla Vite)
- You want Jest-compatible API with 10x faster cold starts
- Modern ESM-first TypeScript project
Side-by-side Quick Start
Jest
// sum.test.ts
import { sum } from './sum';
describe('sum', () => {
it('adds two numbers', () => {
expect(sum(1, 2)).toBe(3);
});
it('handles negative numbers', () => {
expect(sum(-1, 1)).toBe(0);
});
});Vitest
// math.test.ts
import { describe, it, expect, vi } from 'vitest';
import { multiply } from './math';
describe('multiply', () => {
it('multiplies two numbers', () => {
expect(multiply(3, 4)).toBe(12);
});
});Community Verdict
Based on upvoted notes🏆
Jest wins this comparison
Trust Score 91 vs 88 · 3-point difference
Jest leads on Trust Score with stronger signal data across downloads and community health. That said, the other tool is worth considering if your use case matches its specific strengths above.