ArkType

Type syntax you already know with safety and completions unlike anything you've ever seen

Deeply customizable messages with great defaults

Definitions are half as long, type errors are twice as readable, and hovers tell you just what really matters

20x faster than Zod4 and 2,000x faster than Yup at runtime, with editor performance that will remind you how autocomplete is supposed to feel

ArkType uses set theory to understand and expose the relationships between your types at runtime the way TypeScript does at compile time

Every schema is internally normalized and reduced to its purest and fastest representation