Next.js vs React: not either-or. Which one is your app built on?
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Source checked 2 Nov 2026 · Published 2 Nov 2026 · Last reviewed 2 Nov 2026 · By Ctrl+Z Therapy (how we test)
The short answer
It's not one or the other. The Next.js docs say Next.js is a React framework for building full-stack web applications: you use React Components to build user interfaces, and Next.js for additional features and optimizations. React's own site recommends starting a new app or website with a framework, and Next.js's App Router is one of the full-stack frameworks it lists.
What to do
- Ask your AI tool which stack your project is on. Lovable suggests asking: "What stack is this project on?"
- Note the framework, the React version and the build tool, so you can search for help with the right names.
Good to know
- Lovable: TanStack Start became the default for new projects on May 13, 2026. Older projects use Lovable's older React + Vite stack.
- The TanStack Start docs: TanStack Start is a full-stack React framework. So a Lovable app is a React app either way, but not a Next.js app.
- Our tip: when you search for an error, include the framework's name, such as Next.js or TanStack Start, not only React.
Source
- React: Creating a React App
- Next.js: Docs
- TanStack Start: Overview
- Lovable: Upgrade a project to TanStack Start
Checked on 2 Nov 2026. Prices, limits and settings change, so check the source before you rely on them.