Astro vs. Next.js: Which Framework Fits Your Project?

“Should we use Astro or Next.js?” The question comes up as soon as a new website or a relaunch is on the table and both names are in the room, through an agency recommendation, a developer on the team or an article declaring one of them the default.

We build our own website with Astro and offer Astro projects. That makes us less than neutral, so here is the short version up front: for company websites, magazines and documentation we think Astro is the simpler choice. For applications with logged-in areas, dashboards and heavy interaction, Next.js is the better one. This article shows how to tell which case you are in.

This split isn’t our invention; both projects describe themselves this way. Astro calls itself “the web framework for content-driven websites” and lists marketing sites, publishing sites, documentation, blogs, portfolios, landing pages, community sites and e-commerce. Other frameworks, the Astro documentation says, were designed for building web applications such as logged-in admin dashboards, inboxes, social networks or to-do lists. Next.js describes itself as a React framework for building “full-stack web applications”. One caveat: “content-driven” does not mean “static only”. Astro can render on the server, handle forms and keep sessions. It just isn’t designed for a site where nearly every page is an application.

If you first need to decide whether you want a framework at all, the decision overview for WordPress, Astro, headless or Laravel helps. If you are torn between Astro and WordPress, see Astro vs. WordPress.

Where things stand in October 2026

So it is clear what we are talking about:

• Astro is currently at version 7 (since June 2026; the latest release on the Astro blog is Astro 7.3 from 3 September 2026).
• Next.js is at version 16.4, released on 6 October 2026 (source: Next.js blog).

Both are free to use under the MIT licence. Next.js is developed by Vercel. Astro has belonged to Cloudflare since 16 January 2026: according to the announcement on the Astro blog, Cloudflare acquired the Astro Technology Company, and the framework stays open source and MIT-licensed, with open governance and support for a wide set of deployment targets, not just Cloudflare.

An honest word on ownership: both frameworks depend on the interests of a company that sells infrastructure. That is not a dealbreaker, but it is a reason not to lean too hard on platform-specific features. With Next.js you can see it in the documentation, which lists Vercel and Bun as the “verified” adapters and describes Cloudflare and Netlify adapters as work in progress, pointing to their own integrations in the meantime.

How the two render

Astro renders on the server; its documentation calls this “server-first”. By default that happens once, at build time: components become HTML and CSS, and according to the Astro documentation all client-side JavaScript is stripped out unless you explicitly allow it. Interactive parts are “islands”: small pieces you mark with directives such as client:load, client:idle or client:visible, and only those load JavaScript. Islands can be written in React, Preact, Svelte, Vue or Solid, even mixed. For individual dynamic areas there are “server islands” (server:defer), and with an adapter, individual pages can be rendered on the server on demand.

Next.js is built on React and the App Router. Pages and layouts are Server Components by default: they run on the server, and their result is delivered as HTML plus a so-called RSC payload. You mark interactive parts with "use client"; they are “hydrated” in the browser, meaning event handlers are attached. The documentation points out that with "use client", everything that file imports also ends up in the client bundle. Since the 16.x releases there is a new model called Cache Components: parts of a page can be marked as cacheable while others stay dynamic at request time, all in one response. According to the blog, Next.js recommends it for all new apps from 16.4 and announces it as the default in Next.js 17.

The difference in one sentence: Astro starts from “no interactivity” and adds it where needed. Next.js starts from a React application and tries to keep as much of it on the server as possible.

JavaScript in the browser and Core Web Vitals

A prejudice first: the framework alone does not decide your Core Web Vitals. Oversized images, late-loading fonts and advertising or tracking scripts can weigh more on load time than the choice of framework. How we approached it on our own site is covered in Core Web Vitals with Astro.

Still, there is a structural difference. With Astro, “no JavaScript” is the normal case; every island costs something on purpose. With Next.js the amount can also be kept small thanks to Server Components, and the documentation itself lists “reduce the amount of JavaScript sent to the browser” as a benefit. But as soon as Client Components are involved, React and hydration are needed in the browser, and navigation between pages runs client-side via the RSC payload. How big the result is depends on how disciplined the build is. To keep an eye on it, the Next.js documentation points to a bundle analyzer.

We deliberately quote no benchmark numbers here. A comparison of two sample pages says little about what your website delivers with tracking, a cookie banner and forms. If load time is business-critical for you: measure your actual site with real data, not the framework name. For the SEO side of both approaches, Astro and SEO is a good starting point.

Content site or application?

This is the question that decides most cases.

A content site delivers text, images and forms. Most visitors read; few click their way through. Think company sites, landing pages, blogs, documentation, catalogue pages. Astro’s starting point fits here, because you only pay for the interactivity you actually need.

An application has signed-in users, personalised views, state that persists between actions and lots of data requests at runtime: customer portals, dashboards, booking flows, internal tools. Next.js has the edge here: routing, server-side data fetching, Server Actions for mutations, a thought-out caching model and a large React world behind it. Astro has server building blocks too: pages can be rendered per request, Actions are type-safe server functions (for forms, for example), and Sessions keep things like a shopping cart on the server. That is enough for a login area or a cart on a content site. Being the centre of a fully interactive application is not what Astro was built for.

In between lies a wide band: a website with a configurator, a customer area or a search. The question there is what share of the pages is really application. If it is a small share, Astro can handle it as an island or a server-rendered route. If it is the larger share, start with Next.js and bring the content pages in there.

The reverse holds too: Next.js can serve pure content pages just fine, prerendered or as a static export. It simply brings more machinery than a content site needs.

Hosting and operations

For many mid-sized companies this is the most practical difference.

Astro produces static files by default, which any web space can serve. Our own site runs that way on classic hosting. For server rendering there are official adapters for Node.js, Netlify, Vercel and Cloudflare; you enable it per page with export const prerender = false, and the rest stays static.

Next.js, according to its documentation, runs with its full feature set on a Node.js server or in a Docker container. Adapters for platforms come on top. There is also a static export (output: 'export') that runs on any web server, but according to the documentation it is explicitly limited: among other things, Server Actions, cookies, rewrites, redirects and headers from the config, Incremental Static Regeneration, Draft Mode and the default image optimisation are not supported.

What that means in practice: if Next.js is meant to do everything, you need a runtime environment that someone looks after, keeps up to date and monitors. On Vercel that is convenient, but you tie yourself to one provider. Self-hosted, it is one more server in your care. With a static site that part disappears, and with it a whole class of operational problems.

Ecosystem and team

Next.js brings the React ecosystem: many component libraries, many developers on the market, many examples. If your team already writes React and wants to share components between product and website, that is a real argument for Next.js.

Astro is closer to HTML, CSS and Markdown and has a gentle learning curve for anyone who builds websites. It can also embed React components, so you do not have to throw away existing code. It is the smaller world: fewer decisions, but also fewer ready-made building blocks for application logic.

A rule of thumb: whoever will maintain the site later has a say in the decision. A technology your team cannot read becomes a dependency on the service provider.

CMS integration

Both frameworks talk to headless CMSs through APIs. According to the Astro documentation, Astro connects to more than 50 headless CMSs, including Sanity, Contentful, Storyblok, Strapi and WordPress; without a CMS, Markdown files are enough. What that looks like with an editorial system is covered in Headless WordPress with Astro and Storyblok with Astro.

Connecting a headless CMS is equally common with Next.js. One point to factor into your choice is preview: Next.js has a Draft Mode for drafts, which according to the documentation is not available in the static export, so it needs server operation. With Astro, preview comes from the CMS itself or from a page rendered on demand on the server, which again needs an adapter. If editors must see the real page before publishing, clarify that early, whichever framework you choose.

Multilingual sites

Astro ships routing for several languages: locales, default locale, path prefixes and fallbacks are configurable. Separate domains per language are only available with server output, according to the docs; for fully static sites we built our own solution, see Multilingual Astro: Two Domains, Two Languages, One Build.

Next.js does not ship ready-made language logic in the App Router, but a pattern: the language as a route segment (app/[lang]), redirecting by browser language in the proxy, translations as dictionaries. Languages as a sub-path or as a domain are both possible. For conveniences such as translated routes, many projects use libraries like next-intl, which the Next.js docs also list.

Neither takes the real work off your hands: maintained translations, clean hreflang, matching canonicals.

Maintenance and upgrades

Both frameworks evolve quickly, and both have major version jumps. That is not a weakness, but it is a cost factor over the years.

For the jump to Astro 7, the upgrade guide lists, among other things, a stricter Rust compiler (unclosed HTML tags now produce errors), a new default Markdown processor, a changed whitespace default and the removed @astrojs/db package. On a plain project the effort stays modest; on one with many plugins and custom Markdown extensions it is higher.

Next.js maintains upgrade guides for versions 14, 15 and 16, plus codemods and, most recently, next upgrade --agent, which is meant to guide coding assistants through the migration. According to the Next.js blog, Cache Components become the default programming model in Next.js 17 and replace the implicit caching behaviour of earlier App Router versions. That is more than a version bump. On 8 October 2026 the Next.js team also announced a security update for upstream dependencies. If you run a Node server, you need to plan for updates like that.

Bottom line: a static Astro site has fewer parts that can go stale in operation. A Next.js application has more features, and therefore more that needs looking after.

When Astro, when Next.js

Your situation	Leaning towards
Company website, landing pages, blog, documentation	Astro
Classic web space or CDN hosting, no server of your own wanted	Astro
Little interactivity; load time and low maintenance matter	Astro
Content comes from Markdown or a headless CMS and changes at a moderate pace	Astro
Website with a few interactive areas (calculator, search, form)	Astro with islands
Logged-in areas, customer portal, dashboard	Next.js
Many pages are user-specific and rendered per request	Next.js
The team already works in React and wants to share code between product and website	Next.js
High interactivity on almost every page (editors, configurators, real time)	Next.js
Marketing website plus a separate application	Both, kept separate

The last row is not a cop-out: a website and an application can use different tools, each suited to its job, and still appear under one brand.

Our recommendation

If your website mainly informs, convinces and collects enquiries, Astro is in most cases the leaner choice: less technology to operate, less code in the browser, a simpler hosting setup. If you are building a product in which users work, Next.js is very likely the right foundation.

And if you are unsure whether your project is more website or more application, that can usually be settled in a conversation. How we approach Astro projects is described on our Astro agency page. Tell us what the site needs to do, and we will tell you what we recommend, even if the answer is Next.js.

Sources: Astro documentation and Astro blog (docs.astro.build, astro.build/blog), Next.js documentation and Next.js blog (nextjs.org/docs, nextjs.org/blog), all as of 11 October 2026.