AriesDevs engineering team Engineering notes
6 min read
Both Astro and Next.js can rank well, and both ship excellent sites in the right hands. The differences show up in how much JavaScript a page needs and how much of your content is static. Since page speed is part of how search engines evaluate experience, the choice matters for content-heavy sites.
How Astro approaches SEO
Astro builds pages to plain HTML by default and sends no JavaScript unless a component needs it. Interactive parts are loaded as small "islands" only when they are visible or idle. For a marketing site, blog or documentation, that means very small pages, fast loading and clean, crawlable markup. Built-in tools help with sitemaps, image optimisation and per-page metadata.
How Next.js approaches SEO
Next.js renders React on the server or at build time and then hydrates the whole page in the browser. It supports static generation, server rendering and incremental regeneration, and has strong metadata APIs. It shines when your site is also an application, with logged-in dashboards, personalised pages or complex client-side state.
Side by side
- JavaScript sent to the browser: Astro is minimal by default; Next.js ships the React runtime on every page.
- Best for: Astro suits content, marketing and documentation; Next.js suits web apps and mixed sites.
- Interactivity: Astro uses islands (React, Vue, Svelte and others); Next.js is React throughout.
- Content workflows: both work with headless CMSs and Markdown.
- Learning curve: Astro is simple for HTML and CSS developers; Next.js needs solid React knowledge.
What actually improves rankings
Framework choice is only the foundation. Search performance comes from fast loading (good Core Web Vitals), a clear heading structure, unique titles and descriptions, a sitemap, structured data, internal links and, above all, content that answers real questions. Either framework can deliver these; Astro simply makes the fast path the default.
Our recommendation
If your site is mostly pages that people read, choose Astro and add interactive islands where you need them. If your product is an application with accounts and dynamic data, choose Next.js, and consider keeping the public marketing pages on Astro. This website is built with Astro for exactly that reason.
