Source: https://seerepo.com/compare/jestjs/jest/vs/medusajs/medusa
Markdown source: https://seerepo.com/compare/jestjs/jest/vs/medusajs/medusa.md
Description: jest and medusa share 3 technologies: React, js-yaml, and prompts. Both are written in TypeScript.

# jest vs medusa

jest and medusa share 3 technologies: React, js-yaml, and prompts. Both are written in TypeScript.

- [jestjs/jest](https://seerepo.com/r/jestjs/jest): Delightful JavaScript Testing.
- [medusajs/medusa](https://seerepo.com/r/medusajs/medusa): The world's most flexible commerce platform for agents and developers

## What they share and what sets them apart

- In common: React, js-yaml, prompts
- Only in jest: @sinclair/typebox
- Only in medusa: Vite, Express, react-router-dom, connect-redis, Redis, Postgres, bullmq, Stripe, aws-sdk, Tailwind CSS, Zod, React Hook Form, tanstack, Radix UI, dnd-kit, motion, react-currency-input-field, react-country-flag, cmdk, react-helmet-async, @hookform/error-message, @uiw/react-json-view, Ariakit, qrcode, @hookform/resolvers, Ajv, ora, boxen, yaml, winston, openapi3-ts, json-2-csv, csv-parse, express-session, jsonwebtoken, zod-validation-error, morgan, OpenTelemetry, tailwindcss-animate, @tailwindcss/node, PostCSS, tailwind-merge, react-aria, react-stately, sonner, prism-react-renderer, prismjs, @inquirer/confirm, jwks-rsa, oauth4webapi, openid-client, @sendgrid/mail

## Side by side

| | jest | medusa |
|---|---|---|
| Size | 195,068 lines written, 413 code files | 1,150,054 lines written, 7,196 code files |
| Who writes it | 0% of its commits signed by AI. With Claude Code | 0.9% of its commits signed by AI. With Claude Code and GitHub Copilot |
| Activity | Last push November 8, 2026, 7,528 commits, 45,474 stars | Last push November 6, 2026, 10,824 commits, 37,113 stars |
| Tests | 1,729 test files. 57.1% of its code files have a test that imports them | 1,628 test files. 14.5% 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, jest or medusa?

medusa, with 1,150,054 lines written; jest has 195,068.

The proof: [medusajs/medusa's code at commit 0f90146](https://github.com/medusajs/medusa/tree/0f9014650066193280e0cbc4f3898c02319fffc6)

### Which has more GitHub stars, jest or medusa?

jest, with 45,474 stars; medusa has 37,113.

The proof: [jestjs/jest on GitHub](https://github.com/jestjs/jest)

### Which has more tests, jest or medusa?

jest, with 1,729 test files; medusa has 1,628.

The proof: [jestjs/jest's code at commit 7261444](https://github.com/jestjs/jest/tree/72614448ecb9d16c58d6474b3091247c14a5c090)

### Which was updated more recently, jest or medusa?

jest: its last push was on November 8, 2026, and medusa's on November 6, 2026.

The proof: [jestjs/jest's commits on GitHub](https://github.com/jestjs/jest/commits)

### Which has more commits signed by AI, jest or medusa?

medusa: an AI signed 0.9% of its commits, with Claude Code and GitHub Copilot.

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

## Sources

- jestjs/jest: Read on November 10, 2026, at commit 7261444 (https://github.com/jestjs/jest/tree/72614448ecb9d16c58d6474b3091247c14a5c090)
- medusajs/medusa: Read on November 6, 2026, at commit 0f90146 (https://github.com/medusajs/medusa/tree/0f9014650066193280e0cbc4f3898c02319fffc6)

## 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.