Building forms in React can be done using either pure React and HTML for basic needs or leveraging React form libraries for more complex requirements. Form libraries like Formik, react-hook-form, and react-final-form offer developers a range of features such as data validation, styling, and dynamic rendering to streamline form management. Formik is the most popular due to its ease of use and large community, allowing for custom validation logic and integration with the Yup validation library. React-hook-form, built to utilize React hooks, offers superior performance by minimizing component re-renders, making it ideal for complex forms with multiple interactions, despite some compatibility issues with popular UI libraries. React-final-form, known for its small bundle size and high performance, provides modularity and strong typing, favoring developers who need control over form styling. Ultimately, the choice of form library depends on the specific needs of the project, such as performance requirements, community support, and the desired level of customization.