Next.js
React framework · App Router · v16
What it is — A React framework that handles routing, server rendering, data fetching and the production build in one place. One repo, one deploy.
What we use it for — The shell of nearly every app we ship — marketing sites, admin dashboards, customer portals, this site included.
Why this over the alternatives — We weighed Remix (now folded back into React Router), SvelteKit (great DX, smaller pool of senior engineers to hand the codebase off to) and a plain Vite + Express split (more moving parts to maintain). Next won on ecosystem size, documentation quality and the fact that Vercel's own product runs on it — when something breaks at the framework level, someone with commit access has usually already filed the bug.