arktype
TypeScript's 1:1 validator, optimized from editor to runtime
2.1M weekly downloads · 45.5 KB gzip · Health 85/100
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Comparison guide
Arktype vs Io-ts
Side-by-side NPM package comparison
Quick Verdict
Smallest Bundle
Io-ts
5.0 KB gzipped
Most Popular
Io-ts
3.0M weekly downloads
Best Maintained
Arktype
100/100 maintenance score
Highest Quality
Io-ts
80/100 quality score
Overall Pick
Io-ts
Best all-around based on popularity, size, maintenance & quality
io-ts
TypeScript runtime type system for IO decoding/encoding
3.0M weekly downloads · 5.0 KB gzip · Health 68/100
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Choosing between Arktype and Io-ts? 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
Io-ts leads with 3.0M weekly downloads — roughly 1.4x more. Arktype has 2.1M weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Bundle Size
Io-ts has the smallest gzipped bundle at 5.0 KB. Arktype comes in at 45.5 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Health Score Comparison
Arktype has an overall health score of 85/100 (very good), with strong maintenance, security, popularity scores. Io-ts has an overall health score of 68/100 (good), with strong quality, security, popularity scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.
When to Choose Each
Choose Arktype if you value large community support, actively maintained, strong security track record. Choose Io-ts if you value large community support, strong security track record.
Our Verdict
Both Arktype and Io-ts are solid choices for JavaScript development. Arktype 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 arktype better than io-ts?
- It depends on your needs. Arktype has a health score of 85/100 while Io-ts scores 68/100. Io-ts has more recorded weekly downloads (3.0M). Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
- Which has a smaller bundle size, arktype or io-ts?
- Io-ts has the smaller gzipped bundle at 5.0 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use arktype vs io-ts?
- Io-ts has more recorded weekly downloads (3.0M). Download counts reflect package installations, not unique developers.
- Which is better maintained, arktype or io-ts?
- Arktype has a maintenance score of 100/100. Arktype scores 100/100 and Io-ts scores 20/100 on maintenance.
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