For most marketing and content sites, Astro is the better default and Next.js is the better fit only when the site is really an application wearing a marketing skin. Astro ships zero JavaScript by default and renders to static HTML, which is exactly what a brochure site, blog, or documentation set needs. Next.js is a full React application framework — powerful, but you pay for that power in complexity and runtime weight whether or not the page needs it.

That is the short answer. The rest of this guide is the reasoning, because “it depends” is true but useless, and the actual decision is more clear-cut than most framework debates suggest.

The core architectural difference

Astro and Next.js solve different problems, and the confusion comes from the fact that both can render a homepage.

Next.js is a React framework. Every page is a React component tree, and React’s runtime ships to the browser to “hydrate” that tree so it becomes interactive. That model is correct for an app — a dashboard, a configurator, a logged-in product surface — where most of the page is interactive state.

Astro is a content framework with an islands architecture. Pages render to HTML on the server (or at build time) and ship with no JavaScript at all unless you explicitly opt a component in. Where you need interactivity — a search box, a carousel, a menu — you mark that one component as an “island” and only that island ships JS. The other 95% of the page stays static HTML.

For a marketing site, the page is mostly static. The hero, the feature grid, the testimonials, the footer — none of it needs a JavaScript runtime to display. Astro matches the shape of the problem. Next.js makes you ship a framework runtime to render text and images that never change.

Performance: where the gap is widest

The performance difference is not marginal, and it shows up directly in Core Web Vitals — which feed both rankings and conversion.

JavaScript payload

A static Astro page can ship close to zero kilobytes of JavaScript. A comparable Next.js page ships the React runtime plus the framework’s client bundle plus your component code — often hundreds of kilobytes before you have written a single feature. More JavaScript means more to download, parse, and execute on the main thread, which is the single biggest lever on Interaction to Next Paint (INP), the Core Web Vital that roughly 43% of sites were still failing as of mid-2026.

Time to interactive

Because Astro pages are mostly inert HTML, they are interactive almost as soon as they paint. Next.js pages have to hydrate before event handlers attach, and on mid-range mobile devices that hydration cost is real. For a content site read mostly on phones, that is the difference between a snappy page and a janky one.

The honest caveat: a well-optimized Next.js site can hit excellent scores, and a careless Astro site can still be slow if you stuff it with heavy images and third-party scripts. Framework choice sets the ceiling and the default. It does not exempt you from doing the work — which is most of what real performance optimization actually is.

Developer experience and complexity

Where Next.js earns its complexity

If your “marketing site” includes a customer portal, an interactive pricing calculator with server-side logic, authenticated content, or a genuinely app-like surface, Next.js gives you one coherent model for all of it: routing, data fetching, server components, API routes, and React everywhere. Forcing that into a content framework would be the wrong call.

Where Astro is simpler

For a content site, Astro is dramatically less to reason about. You write HTML-like components, you can drop in React, Vue, or Svelte islands if you want them, and you do not have to think about hydration boundaries, server-versus-client component rules, or the framework’s data-fetching conventions. Content lives in Markdown or MDX with a typed schema. The mental model is “a fast site generator that lets me use components,” and for a team that publishes content rather than ships application features, that is the right amount of framework.

Hosting and cost

Astro’s static output deploys to any CDN or static host cheaply and predictably — there is no server to keep warm, and traffic spikes are absorbed by the edge. Next.js can also be deployed statically for simple cases, but its dynamic features (server rendering, API routes, image optimization) generally assume a Node runtime or a platform that provides one, which carries operational cost and a vendor-affinity you should choose deliberately rather than inherit.

For a marketing site, the static path is almost always cheaper to run and easier to keep fast under load.

A simple rule for choosing

Use this test. Write down what the site actually does:

  • If it is content that mostly displays — pages, posts, case studies, docs, landing pages — choose Astro. You will get a faster site with less code and lower hosting cost, and you can still add interactive islands where you genuinely need them.
  • If it is an application that also has marketing pages — dashboards, accounts, complex stateful interactions across most of the screen — choose Next.js, and treat the marketing pages as part of the app.
  • If you are migrating an existing WordPress site primarily for speed and SEO, Astro is usually the destination, and the migration is its own discipline — we cover how we run it without losing rankings in WordPress-to-Astro migration.

The mistake we see most often is teams choosing Next.js for a content site because it is the popular default, then spending months fighting hydration and bundle size to claw back the performance they would have had for free with Astro.

What we recommend in practice

We build content and marketing sites on Astro because the architecture is honest about what those sites are: fast-loading documents with a few interactive moments. When a project is genuinely application-shaped, we reach for a React framework and scope it as software, not as a website. The framework should match the work — picking it for resume value or popularity is how sites end up slow and expensive to run.

If you are weighing this decision for a real project and want a recommendation grounded in your actual content and traffic rather than a generic benchmark, that is exactly the kind of call our website development practice exists to make. The right framework is the one you will still be happy with in year three, not the one that demos well in week one.