Source: https://seerepo.com/compare/cypress-io/cypress/vs/vitest-dev/vitest
Markdown source: https://seerepo.com/compare/cypress-io/cypress/vs/vitest-dev/vitest.md
Description: cypress and vitest share 5 technologies: Vite, Vue, vue-router, ansi-to-html, and floating-vue. Both are written in TypeScript.

# cypress vs vitest

cypress and vitest share 5 technologies: Vite, Vue, vue-router, ansi-to-html, and floating-vue. Both are written in TypeScript.

- [cypress-io/cypress](https://seerepo.com/r/cypress-io/cypress): Fast, easy and reliable testing for anything that runs in a browser.
- [vitest-dev/vitest](https://seerepo.com/r/vitest-dev/vitest): Next generation testing framework powered by Vite.

## What they share and what sets them apart

- In common: Vite, Vue, vue-router, ansi-to-html, floating-vue
- Only in cypress: @angular/core, Angular, React, react-router-dom, Svelte, vue-demi, Express, express-graphql, nexus, Electron, graphql-relay, graphql-scalars, method-override, SQLite, prop-types, node-html-parser, Tailwind CSS, @popperjs/core, vue-toastification, EJS, front-matter, basic-auth, jimp, markdown-it, shiki, plist, classnames, prismjs, Zod, electron-context-menu, tough-cookie, jose, sanitize-filename, image-size, morgan, OpenTelemetry, Autoprefixer, Sass
- Only in vitest: pngjs, @standard-schema/spec, UnoCSS, codemirror, splitpanes, vue-virtual-scroller, prompts, @edge-runtime/vm

## Side by side

| | cypress | vitest |
|---|---|---|
| Size | 651,557 lines written, 1,719 code files | 233,543 lines written, 594 code files |
| Who writes it | 3.1% of its commits signed by AI. With Claude Code, Cursor, and GitHub Copilot | 3.2% of its commits signed by AI. With Claude Code, Codex, GitHub Copilot, and Cursor |
| Activity | Last push November 5, 2026, 21,927 commits, 51,023 stars | Last push November 6, 2026, 6,421 commits, 17,341 stars |
| Tests | 2,939 test files. 33.2% of its code files have a test that imports them | 1,662 test files. 12.6% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, cypress or vitest?

cypress, with 651,557 lines written; vitest has 233,543.

The proof: [cypress-io/cypress's code at commit 5b72b7e](https://github.com/cypress-io/cypress/tree/5b72b7ee2fc7189204b6be41282c1abab60facc8)

### Which has more GitHub stars, cypress or vitest?

cypress, with 51,023 stars; vitest has 17,341.

The proof: [cypress-io/cypress on GitHub](https://github.com/cypress-io/cypress)

### Which has more tests, cypress or vitest?

cypress, with 2,939 test files; vitest has 1,662.

The proof: [cypress-io/cypress's code at commit 5b72b7e](https://github.com/cypress-io/cypress/tree/5b72b7ee2fc7189204b6be41282c1abab60facc8)

### Which was updated more recently, cypress or vitest?

vitest: its last push was on November 6, 2026, and cypress's on November 5, 2026.

The proof: [vitest-dev/vitest's commits on GitHub](https://github.com/vitest-dev/vitest/commits)

### Which has more commits signed by AI, cypress or vitest?

vitest: an AI signed 3.2% of its commits, with Claude Code, Codex, GitHub Copilot, and Cursor; in cypress, 3.1%.

The proof: [the commits each tool signed in vitest-dev/vitest](https://seerepo.com/r/vitest-dev/vitest/ai)

## Sources

- cypress-io/cypress: Read on November 5, 2026, at commit 5b72b7e (https://github.com/cypress-io/cypress/tree/5b72b7ee2fc7189204b6be41282c1abab60facc8)
- vitest-dev/vitest: Read on November 7, 2026, at commit f21f224 (https://github.com/vitest-dev/vitest/tree/f21f224bad11e738840bda1f4b6d64dd7de4a425)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.