What Zod does
Zod is a TypeScript-first validation library. Developers define schemas that validate data, from a single string to a complex nested object, and parsing returns results that are type-safe. Zod infers static TypeScript types from those schemas, so validation rules and types stay in one place. The library has no external dependencies, runs in Node.js and modern browsers, and has a core of about 2 kB gzipped. It also converts schemas to JSON Schema and installs with npm. The site requires TypeScript 5.5 or later with strict mode enabled.
How Zod compares with its closest alternatives
All 5 closest alternatives have a free plan, as Zod does. Among the 2 that list a starting price, the cheapest is Linear at $8 a month and the median is $23.50. All 5 offer an API; FalcoScan's records show none for Zod. Zod offers a web app. Of the alternatives, all 5 offer a web app. Zod was founded in 2020; the alternatives were founded between 2019 and 2022, 3 of them earlier. Zod has no single headquarters on record, and 1 of its alternatives is also distributed.