The problem both tools solve is the same: you write an API in TypeScript and your frontend immediately knows the types — request shape, response shape, errors — without a code generation step, without an OpenAPI schema, without a shared types package you have to keep synchronized manually.
The implementation is very different.
tRPC builds on React Query and has deep Next.js integration. The client is a React Query wrapper — you get caching, background refetching, and optimistic updates automatically. Hono RPC is lighter. It generates a typed fetch client from your route definitions, works with any TypeScript consumer (React, Vue, Svelte, React Native, plain Node.js scripts), and runs on Cloudflare Workers, Bun, and Deno with zero changes.
The Core Model
tRPC: Procedures on a Router
