Side-by-side NPM package comparison
Version 2.1.29
TypeScript's 1:1 validator, optimized from editor to runtime
Version 2.2.22
TypeScript runtime type system for IO decoding/encoding
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.
Io-ts leads with 2.3M weekly downloads — roughly 3.0x more. Arktype has 750.8K weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Arktype has the smallest gzipped bundle at 98.5 KB. Io-ts comes in at 134.8 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Arktype has an overall health score of 77/100 (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.
Choose Arktype if you value strong security track record. Choose Io-ts if you value large community support, strong security track record.
Both Arktype and Io-ts are solid choices for JavaScript development. Arktype has the edge in overall health score (77/100), 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.