Vitest
Work on Vitest? Verify this listing (free)Free, Vite-native unit and component test runner, Jest-compatible
MIT-licensed test runner from the Vite team (VoidZero), now on v5 (5.0.5). It reuses your Vite config and plugins, runs TypeScript, JSX and ESM out of the box, and has a smart watch mode that only reruns tests affected by a change. Jest-compatible expect, snapshots and mocking make migrating from Jest straightforward, and it works for backend code without Vite too. Includes Browser Mode (real-browser component tests via Playwright or WebdriverIO), v8/istanbul coverage, type testing, benchmarking, sharding, a UI, and a /llms.txt docs bundle plus a 'Writing Tests with AI' guide for coding agents. ~17k GitHub stars and ~76.5M npm downloads a week.
Best for: Vite, React, Vue, Svelte or Node apps that need fast unit and component tests a coding agent can write and run in watch mode
Visit Vitest ↗- Pricing
- Free and open source (MIT). No paid tier; funded by sponsors
- Free tier
- Yes: fully free MIT open source with no usage limits or paid cloud
- Open source
- Yes
- Last verified
- 2026-10-17
Vitest pricing breakdown, history and cheaper alternatives →
Sources (checked 2026-10-17): vitest.dev · vitest.dev/guide/features · vitest.dev/guide/browser · github.com/vitest-dev/vitest · npmjs.com/package/vitest
Score breakdown
- Fit for the use case18 / 25
- Vibe-coder friendliness11 / 15
- Output quality & reliability14 / 15
- Pricing & free tier15 / 15
- Ecosystem & integrations10 / 10
- Momentum10 / 10
- Code ownership & lock-in9 / 10
Why this score: The default unit-test runner for Vite-based apps: completely free (MIT), Jest-compatible, very fast watch mode, and huge adoption (~76.5M weekly npm downloads). Scores below Playwright (92) and Cypress (88) on fit because unit tests catch less of what breaks a shipped vibe-coded app than end-to-end tests do; most apps want both.
Based on desk research of official pricing pages and docs; see methodology.
FAQ
- Is Vitest free?
- Vitest free tier: Yes: fully free MIT open source with no usage limits or paid cloud. Paid pricing: Free and open source (MIT). No paid tier; funded by sponsors.
- What is Vitest pricing in 2026?
- Vitest pricing (as of our last verification on 2026-10-17): Free and open source (MIT). No paid tier; funded by sponsors. Always confirm on the official site — plans change.
- Is Vitest open source?
- Yes. Vitest is open source.
- What is Vitest's PromptToProd score?
- Vitest scores 87/100 on PromptToProd (fit, vibe-coder friendliness, quality, pricing, ecosystem, momentum, ownership). See the score breakdown on this page and our methodology.
- What is Vitest best for?
- Vitest is best for: Vite, React, Vue, Svelte or Node apps that need fast unit and component tests a coding agent can write and run in watch mode.
- When was Vitest last verified on PromptToProd?
- Pricing and details for Vitest were last verified on 2026-10-17 from official docs and pricing pages.
Alternatives
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