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AstrovsNext.js

Astro vs Next.js ComparisonZero-JS content sites vs full-stack React apps: the framework choice most teams get wrong

Astro launched in 2021 with a radical idea: ship zero JavaScript by default, and only hydrate the components that actually need interactivity. For marketing sites, blogs, docs, and landing pages, which represents the majority of the web, and this produces dramatically faster pages than React-based frameworks. Next.js remains the right choice for applications: dashboards, SaaS products, e-commerce, and anything with user auth and dynamic data. The mistake teams make is reaching for Next.js for every project, including sites that would be faster and simpler in Astro.

Head-to-head summary

4
Astro wins
0
Ties
3
Next.js wins

Detailed comparison

JavaScript shipped to browser
Astro
Zero by default: only interactive components hydrated
Next.js
React runtime always included, even for mostly-static pages
Core Web Vitals
Astro
Excellent: minimal JS means fast LCP, low CLS, low INP
Next.js
Good: requires careful optimization to match Astro scores
Full-stack capabilities
Astro
Limited: API routes exist but not full-stack application framework
Next.js
Excellent: full-stack React with Server Components, API routes, auth
Framework agnostic
Astro
Excellent: use React, Vue, Svelte, Solid components together
Next.js
React-only: framework is tightly coupled to React
Content management
Astro
Excellent: built-in content collections with type-safe frontmatter
Next.js
Requires external CMS integration: no native content layer
Dynamic data & auth
Astro
Possible but limited: not designed for complex auth flows
Next.js
Excellent: full auth ecosystem, server actions, middleware
Ecosystem maturity
Astro
Newer but growing fast: excellent docs, active community
Next.js
Larger ecosystem: more tutorials, more production examples

Our verdict

It's a tie: context determines the winner

There's no universal winner. Astro wins for content sites (marketing sites, blogs, documentation, landing pages) where minimal JavaScript means better Core Web Vitals, lower hosting costs, and simpler deployments. Next.js wins for applications: SaaS, dashboards, e-commerce, anything with auth, dynamic data, and complex UI state. Many teams benefit from using both: Astro for the marketing site, Next.js for the app.

When to choose each

Choose Astro when:

  • You're building a marketing site, blog, documentation site, or landing page
  • Core Web Vitals and page speed scores are important for SEO or conversions
  • Your team wants to use different UI frameworks in the same project
  • You want to minimise client-side JavaScript and hosting complexity

Choose Next.js when:

  • You're building a SaaS application, dashboard, or any product with user auth
  • Your app has complex UI state that benefits from React's ecosystem
  • You need server actions, middleware, and full-stack React capabilities
  • Your team knows React deeply and doesn't want to learn a new framework

Frequently asked questions

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