Astro vs Next.js

Astro and Next.js are popular web frameworks with different optimization targets — Astro ships minimal JavaScript while Next.js provides full-stack React capabilities.

Overview

Astro is a content-focused web framework that ships zero JavaScript by default, using "Islands Architecture" to hydrate only interactive components. Next.js is a full-stack React framework with SSR, SSG, API routes, server components, and the largest React ecosystem.

Key Differences

JavaScript shipped: Astro ships near-zero JS by default (content pages are pure HTML). Next.js ships the React runtime plus page-specific bundles. Performance: Astro pages are faster for content sites (less JS to parse). Next.js is fast but ships more client-side code. Full-stack: Next.js is a full-stack framework (API routes, server actions, middleware). Astro is primarily a content framework with limited backend. Component flexibility: Astro supports React, Vue, Svelte, and Solid components in the same project. Next.js is React-only. Use case: Astro excels at blogs, documentation, marketing sites. Next.js excels at web applications, dashboards, SaaS products.

Verdict

Choose Next.js for full-stack web applications requiring authentication, API routes, and complex client-side interactivity. Choose Astro for content-heavy sites (blogs, docs, marketing) where page speed and minimal JavaScript are priorities.