Head-to-Head: Runtypes vs Yup Analysis


v6.7.0(4 months ago)

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

Runtypes is a lightweight and powerful runtime type system for JavaScript and TypeScript. It allows you to define and enforce type constraints on your data at runtime, providing runtime type checking and validation. With Runtypes, you can easily define complex data structures, validate input data, and ensure type safety in your applications.

Alternatives: prop-types, io-ts, ts-runtime

Tags: javascripttypescripttype-checkingruntime-type-systemvalidation


v1.3.2(5 days ago)

This package is actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 4Monthly npm downloads

Yup is a JavaScript schema validation library that allows you to define and validate the shape of your data. It provides a simple and intuitive API for creating validation schemas and validating data against those schemas. With Yup, you can easily define rules and constraints for your data, such as required fields, data types, string lengths, and more.

Alternatives: joi, validator.js, ajv

Tags: javascriptvalidationschemadataform



Yup is a more popular choice among developers and has a larger community following. It has been around for longer and is widely used in the JavaScript ecosystem. Runtypes, while gaining popularity, is relatively newer and has a smaller user base.


Both Runtypes and Yup are libraries for runtime type checking and validation in JavaScript. Yup provides a rich set of validation methods and supports schema-based validation. Runtypes, on the other hand, focuses on providing a concise and expressive syntax for defining and validating types. It also supports runtime type checking and provides a powerful type inference system.

Developer Experience

Yup has a more mature and well-documented API, making it easier for developers to get started and integrate into their projects. It has a clear and intuitive syntax for defining validation schemas. Runtypes, while also well-documented, has a slightly steeper learning curve due to its more expressive type definition syntax.


Yup is commonly used with form libraries like Formik and React Hook Form, providing seamless integration for form validation. Runtypes, on the other hand, is more generic and can be used in various contexts, including server-side validation and data validation in non-React projects.

TypeScript Support

Both libraries have excellent TypeScript support. Yup provides built-in TypeScript definitions and has good compatibility with TypeScript projects. Runtypes, being a library focused on type checking, has strong TypeScript integration and provides advanced type inference capabilities.


Both libraries are actively maintained by their respective communities. Yup has a larger user base and a longer history of maintenance, which ensures stability and ongoing updates. Runtypes, while newer, has shown active development and responsiveness to user feedback.