Jest vs Vitest
Jest
jestjs.io
Vitest
vitest.devSide by side
| Figure | Jest | Vitest |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 1 |
| Spec score · JavaScript Testing Frameworks | 7.7 (#8) | 7.6 (#12) |
| Spec score · Unit Testing | 7.6 (#15) | 7.5 (#19) |
| Spec score · Unit Testing Frameworks | 7.7 (#20) | 7.5 (#25) |
| Coverage | The site says Jest can collect project code coverage, including from untested files, with the --coverage flag. | Vitest supports code coverage through V8 or Istanbul. |
| Security | The Jest repository links a security policy, but the official pages opened did not state a security certification or compliance standard. | The maker's announcement says it plans an enterprise JavaScript tooling solution designed for scale and security requirements; it does not state a Vitest security certification. |
| Support | The site points users to Stack Overflow, Reactiflux, and Twitter for community help. | The guide directs users needing help to the Vitest Discord community and GitHub Discussions. |
| Watch mode | The repository describes an interactive watch mode that runs test files related to changed files. | Watch mode reruns tests related to changed source or test files. |
Plans
In their own words
Jest
Jest is a free, self-hosted JavaScript testing framework focused on checking correctness. It supports projects using Babel, TypeScript, Node, React, Angular, Vue and other technologies, and aims to run without configuration on most JavaScript projects. Snapshot tests compare rendered output with a saved reference. Tests run in separate processes for parallel execution, while the --coverage flag can collect coverage, including from files without tests. Mock functions and a custom import resolver support replacing objects and observing calls. Interactive watch mode reruns tests related to changed files. Installation guidance covers npm, Yarn, pnpm and Bun. Documentation describes webpack and Parcel use, but states that Vite is unsupported because of plugin-system incompatibilities. With Babel handling TypeScript, Jest transpiles tests without type-checking them during execution. A free plan is listed at free, with no paid plans or usage limits stated.
Vitest
Vitest is a free and open-source testing framework powered by Vite, though it can also run without Vite. It can reuse Vite configuration, plugins, resolvers, and transform pipelines. Jest-compatible APIs cover assertions, snapshots, and mocking, which can support migration from Jest. Watch mode reruns tests related to changed source or test files, and TypeScript, JSX, and ES modules work out of the box. Browser Mode runs tests in a browser and supports Playwright and WebdriverIO providers. Component testing covers Vue, React, Svelte, Lit, Marko, and other frameworks. Vitest supports coverage through V8 or Istanbul, benchmarking powered by Tinybench, parallel execution, parameterized cases, and property-based checks. An official Visual Studio Code extension is available, and the framework can be tried in StackBlitz without local installation. The listed requirements are Vite 6.4.0 or later and Node 22.12.0 or later. Help is available through the Vitest Discord community and GitHub Discussions.