Head-to-Head: ow vs Zod Analysis


v1.1.1(10 months ago)

This package is actively maintained.The package doesn't have any types definitionsNumber of direct dependencies: 5Monthly npm downloads

OW is a powerful and flexible JavaScript library for validating and asserting the types and shapes of JavaScript values. It provides a simple and intuitive API for defining validation rules and checking if values meet those rules. OW supports various types of validations including primitive types, arrays, objects, functions, and more.

Alternatives: joi, yup, io-ts

Tags: javascriptvalidationassertiontypesshapes


v3.22.4(about 2 months ago)

This package is actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 0Monthly npm downloads

Zod is a lightweight TypeScript schema validation library that is designed to make it easy to validate and sanitize complex input data. It provides a simple and intuitive syntax for defining a schema that can be used to validate objects, as well as a performant runtime validation engine that can validate data at runtime.

Alternatives: joi, yup, ajv

Tags: typescriptvalidationschemaruntime-validation



Both Ow and Zod are popular npm packages in the JavaScript community. However, Zod has gained more popularity in recent years due to its modern approach and extensive features.

Validation Features

Ow is a lightweight and minimalistic validation library that focuses on providing a simple and intuitive API for type checking and validation. It has a smaller feature set compared to Zod. On the other hand, Zod is a more comprehensive and powerful validation library that offers advanced features like schema generation, runtime validation, and support for complex data structures.

Developer Experience

Both libraries provide a good developer experience. Ow has a very straightforward and easy-to-use API, making it quick to get started with. Zod, on the other hand, has a more expressive and declarative API that allows for more complex validation scenarios. It also provides better error messages and TypeScript support out of the box.

TypeScript Support

Both Ow and Zod have excellent TypeScript support. However, Zod is specifically designed with TypeScript in mind and provides better type inference and type safety. It leverages TypeScript's type system to provide more accurate and reliable type checking during validation.

Community and Documentation

Both libraries have active communities and are well-documented. Zod has a larger community and more extensive documentation, including examples and guides. It also has a more active GitHub repository with regular updates and bug fixes.


In terms of performance, Ow is generally faster and more lightweight compared to Zod. Ow focuses on minimalism and simplicity, which results in better performance for simple validation tasks. Zod, being a more feature-rich library, may have slightly slower performance for complex validation scenarios.