trpc

Automatically propagates server-side types to the client, providing full autocompletion and type checking without manual definitions, as shown in the README's demo where the client imports only type declarations.

Eliminates code generation and complex build pipelines, offering a snappy developer experience with zero runtime bloat, which is highlighted as a key feature for fast iteration.

Has zero external dependencies and a minimal client-side footprint, ensuring small bundle sizes and reduced performance overhead, as stated in the features list.

Offers batteries-included adapters for React, Next.js, Express, and Fastify, plus community adapters for other libraries, making it adaptable to various project setups.