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Comparison guide
Jest vs Mocha
Side-by-side NPM package comparison
Quick Verdict
Jest leads across all categories in this comparison. Check the detailed metrics below to see how each package performs for your specific needs.
mocha
Classic, reliable, trusted test framework for Node.js and the browser
12.7M weekly downloads · 31.3 KB gzip · Health 85/100
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Choosing between Jest and Mocha? Here's a data-driven comparison based on real npm data — downloads, bundle size, health scores, and more — to help you decide which package fits your project best.
Downloads & Popularity
Jest leads with 46.3M weekly downloads — roughly 3.6x more. Mocha has 12.7M weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Bundle Size
Jest has the smallest gzipped bundle at 2.0 KB. Mocha comes in at 31.3 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Health Score Comparison
Jest has an overall health score of 92/100 (excellent), with strong maintenance, quality, security, popularity scores. Mocha has an overall health score of 85/100 (very good), with strong maintenance, security, popularity scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.
When to Choose Each
Choose Jest if you value massive community and ecosystem, minimal bundle footprint, actively maintained, strong security track record. Choose Mocha if you value massive community and ecosystem, actively maintained, strong security track record.
Our Verdict
Both Jest and Mocha are solid choices for JavaScript development. Jest has the edge in overall health score (92/100), while each package brings unique strengths to the table. Evaluate them based on your project's priorities — whether that's community size, bundle efficiency, or maintenance activity — and choose the one that aligns best with your requirements.
Frequently Asked Questions
- Is jest better than mocha?
- It depends on your needs. Jest has a health score of 92/100 while Mocha scores 85/100. Jest has more recorded weekly downloads (46.3M). Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
- Which has a smaller bundle size, jest or mocha?
- Jest has the smaller gzipped bundle at 2.0 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use jest vs mocha?
- Jest has more recorded weekly downloads (46.3M). Download counts reflect package installations, not unique developers.
- Which is better maintained, jest or mocha?
- Jest has a maintenance score of 100/100. Jest scores 100/100 and Mocha scores 100/100 on maintenance.
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