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Valibot vs Zod

Side-by-side NPM package comparison

Quick Verdict

Smallest Bundle

Valibot

529.8 KB gzipped

Most Popular

Zod

139.0M weekly downloads

Best Maintained

Valibot

100/100 maintenance score

Highest Quality

Valibot

80/100 quality score

Overall Pick

Zod

Best all-around based on popularity, size, maintenance & quality

valibot icon

valibot

Very Popular

Version 1.3.1

0
92
Excellent

The modular and type safe schema library for validating structural data

Weekly Downloads
7.0M
Stable
Bundle (gzip)
529.8 KB
Updated
Vulns
0

Health Score Breakdown

Maintenance
100
Popularity
100
Quality
80
Security
100
Stability
70
zod icon

zod

Extremely Popular

Version 4.3.6

0
86
Excellent

TypeScript-first schema declaration and validation library with static type inference

Weekly Downloads
139.0M
↑17%
Bundle (gzip)
1.2 MB
Updated
Vulns
0

Health Score Breakdown

Maintenance
80
Popularity
100
Quality
80
Security
100
Stability
70

Choosing between Valibot 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 139.0M weekly downloads — roughly 19.8x more. Valibot has 7.0M weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.

Bundle Size

Valibot has the smallest gzipped bundle at 529.8 KB. Zod comes in at 1.2 MB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.

Health Score Comparison

Valibot has an overall health score of 92/100 (excellent), with strong maintenance, quality, security, popularity scores. Zod has an overall health score of 86/100 (very good), with strong maintenance, quality, security, popularity scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.

When to Choose Each

Choose Valibot if you value large community support, actively maintained, strong security track record. Choose Zod if you value massive community and ecosystem, strong security track record.

Our Verdict

Both Valibot and Zod are solid choices for JavaScript development. Valibot 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 valibot better than zod?
It depends on your needs. Valibot has a health score of 92/100 while Zod scores 86/100. Zod has more weekly downloads (139.0M), suggesting broader adoption. Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
Which has a smaller bundle size, valibot or zod?
Valibot has the smaller gzipped bundle at 529.8 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
How many developers use valibot vs zod?
Based on npm download statistics, Valibot has approximately 7.0M weekly downloads and Zod has approximately 139.0M weekly downloads. These numbers reflect package installations, not unique developers, but they indicate relative adoption levels.
Which is better maintained, valibot or zod?
Valibot currently has the higher overall health score at 92/100. Valibot has a maintenance score of 100/100 and Zod scores 80/100 on maintenance.

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