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Comparison guide
Yup vs Zod
Side-by-side NPM package comparison
Quick Verdict
Smallest Bundle
Yup
13.1 KB gzipped
Most Popular
Zod
373.9M weekly downloads
Best Maintained
Zod
100/100 maintenance score
Highest Quality
Zod
80/100 quality score
Overall Pick
Zod
Best all-around based on popularity, size, maintenance & quality
zod
TypeScript-first schema declaration and validation library with static type inference
373.9M weekly downloads · 86.5 KB gzip · Health 92/100
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Choosing between Yup and Zod? 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
Zod leads with 373.9M weekly downloads — roughly 25.5x more. Yup has 14.7M weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Bundle Size
Yup has the smallest gzipped bundle at 13.1 KB. Zod comes in at 86.5 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Health Score Comparison
Zod has an overall health score of 92/100 (excellent), with strong maintenance, quality, security, popularity scores. Yup has an overall health score of 61/100 (good), with strong security, popularity scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.
When to Choose Each
Choose Yup if you value massive community and ecosystem, strong security track record. Choose Zod if you value massive community and ecosystem, actively maintained, strong security track record.
Our Verdict
Both Yup and Zod are solid choices for JavaScript development. Zod 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 yup better than zod?
- It depends on your needs. Yup has a health score of 61/100 while Zod scores 92/100. Zod has more recorded weekly downloads (373.9M). Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
- Which has a smaller bundle size, yup or zod?
- Yup has the smaller gzipped bundle at 13.1 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use yup vs zod?
- Zod has more recorded weekly downloads (373.9M). Download counts reflect package installations, not unique developers.
- Which is better maintained, yup or zod?
- Zod has a maintenance score of 100/100. Yup scores 20/100 and Zod scores 100/100 on maintenance.
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