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Next.jsvsAstro
What is the difference between Next.js and Astro?
Updated 3 min read7 differences
In short
Next.js is a React framework for full web applications; Astro is built for content sites and sends JavaScript only for interactive islands.
Next.js
Next.js is a React framework that adds routing, server-side rendering, static generation and server code, so a whole web app can be built as one project.
Read the page on Next.jsAstro
Astro is a web framework for content-driven sites that renders pages to HTML and ships no JavaScript by default, adding it only to interactive islands.
Read the page on AstroNext.js and Astro compared
| Aspect | Next.js | Astro |
|---|---|---|
| Built for | Full web applications built with React | Content-driven sites such as blogs, docs and marketing pages |
| UI components | React only | .astro components, plus React, Vue, Svelte, Solid or Preact |
| JavaScript in the browser | React's runtime plus every client component | None by default; only islands with a client:* directive |
| Rendering | Static, per request or regenerated over time, chosen per page | Static by default; per request with an adapter |
| Navigation | Client-side, like a single-page app | Full page loads by default, like a multi-page site |
| Server code | Route handlers and server actions | Endpoints and actions, with an adapter |
| Backed by | Vercel, which created it in 2016 | Cloudflare, which the Astro team joined in 2026 |
The difference, explained
Next.js and Astro are open-source frameworks for building websites with components, file-based routing and server rendering. Next.js, released in 2016 by the company now called Vercel, is a React framework for full web applications: pages, data loading, server code and API routes in one project. Astro, which reached 1.0 in 2022, is aimed at content-driven sites such as blogs, documentation and marketing pages, and renders each page to HTML with no JavaScript by default.
The essential difference is how much JavaScript reaches the browser. Next.js runs the interface with React: Server Components render on the server, but React's runtime and every client component marked "use client" still load in the browser, and moving between pages happens on the client, like a single-page app. Astro treats each page as its own HTML document, like a multi-page application, and adds JavaScript only to interactive islands, chosen with directives such as client:load or client:visible. So Astro usually ships far less JavaScript on content pages, while Next.js handles app-like screens, where nearly everything is interactive, more naturally.
Both can build static pages and render on the server for each request: Next.js chooses per page, while Astro builds static pages by default and renders on the server with an adapter for your host. Astro isn't tied to one UI library; its islands can be React, Vue, Svelte, Solid or Preact components, even mixed on one page, so a React team can reuse its components inside an Astro site. Next.js is backed by Vercel, and Astro's team joined Cloudflare in January 2026; both stay open source and deploy to many hosts.
A common misconception is that Astro is only a static site generator. It started as one, but with an adapter it renders pages per request and offers server endpoints. Another is that Next.js only runs on Vercel, when it runs on any Node.js server, in Docker or as a static export. The real question is whether the site is mostly content to read or an application to use.
Which one should you use?
Choose Next.js when…
- You're building an application with accounts, dashboards and lots of interactive state.
- Your team works in React and wants the frontend and backend in one project.
- You want client-side navigation and rendering choices per page.
Choose Astro when…
- The site is mostly content: a blog, documentation, a marketing site or a catalog.
- Page speed and minimal JavaScript matter most.
- You want to write pages in Markdown or MDX with content collections.
- You want to mix React, Vue or Svelte components, or use none at all.
Readers ask
Is Astro faster than Next.js?
On content sites, pages usually load faster with Astro because it sends little or no JavaScript. On highly interactive apps the gap shrinks, since both must send the code for every interactive part.
Can I use React components in Astro?
Yes, through Astro's official React integration. They render to HTML on the server and load in the browser only with a client:* directive; components that rely on Next.js features, such as next/link, need changes.
Which is better for SEO, Next.js or Astro?
Both send search engines fully rendered HTML, from the server or the build, so either can rank well. Astro's smaller JavaScript often helps page-speed scores, but content and structure matter more.