mocha
Classic, reliable, trusted test framework for Node.js and the browser
16.0M weekly downloads · 31.3 KB gzip · Health 85/100
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Comparison guide
Mocha vs Vitest
Side-by-side NPM package comparison
Quick Verdict
Smallest Bundle
Mocha
31.3 KB gzipped
Most Popular
Vitest
142.1M weekly downloads
Best Maintained
Mocha
100/100 maintenance score
Highest Quality
Mocha
50/100 quality score
Overall Pick
Vitest
Best all-around based on popularity, size, maintenance & quality
vitest
Next generation testing framework powered by Vite
142.1M weekly downloads · 101.3 KB gzip · Health 85/100
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Choosing between Mocha and Vitest? 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
Vitest leads with 142.1M weekly downloads — roughly 8.9x more. Mocha has 16.0M weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Bundle Size
Mocha has the smallest gzipped bundle at 31.3 KB. Vitest comes in at 101.3 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Health Score Comparison
Mocha has an overall health score of 85/100 (very good), with strong maintenance, security, popularity scores. Vitest 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 Mocha if you value massive community and ecosystem, actively maintained, strong security track record. Choose Vitest if you value massive community and ecosystem, actively maintained, strong security track record.
Our Verdict
Both Mocha and Vitest are solid choices for JavaScript development. Mocha has the edge in overall health score (85/100), 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 mocha better than vitest?
- It depends on your needs. Mocha has a health score of 85/100 while Vitest scores 85/100. Vitest has more recorded weekly downloads (142.1M). Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
- Which has a smaller bundle size, mocha or vitest?
- Mocha has the smaller gzipped bundle at 31.3 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use mocha vs vitest?
- Vitest has more recorded weekly downloads (142.1M). Download counts reflect package installations, not unique developers.
- Which is better maintained, mocha or vitest?
- Mocha has a maintenance score of 100/100. Mocha scores 100/100 and Vitest scores 100/100 on maintenance.
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