Next.js Server Actions vs tRPC: how to actually choose If you are building a Next.js app with the App Router and trying to decide between Server Actions and tRPC for your mutations, here is the short version: reach for Server Actions when you have simple forms tied to a single web client, and reach for tRPC once you need request batching, query caching, or a shared API layer across web and mobile. Both solve the same underlying problem, getting typed data from the browser to the server witho...