WordPress
vs Astro
For content-heavy sites where performance is a primary concern, Astro's zero-JavaScript-by-default architecture and island hydration model offer a fundamentally different approach from WordPress's server-rendered PHP pages.
Side-by-Side Comparison
Server-rendered PHP on each request. TTFB of 200-800ms depending on hosting and caching. Render-blocking scripts from plugins. Full page JavaScript bundles regardless of page content.
Static HTML by default with zero client JavaScript. TTFB under 50ms from CDN. JavaScript only ships for interactive components (islands). Lighthouse scores are near-perfect out of the box.
Gutenberg block editor in the browser. Non-technical editors create content without touching code. Familiar WYSIWYG experience. Rich media management built in.
Markdown and MDX files in a code repository by default. Content Collections with type-safe schemas. For non-technical editors, requires integration with a headless CMS (Sanity, Contentful, Storyblok).
PHP templating with the option to add React or Vue via plugins. Theme architecture constrains frontend choices. Mixing frameworks is not a supported pattern.
Framework-agnostic — use React, Vue, Svelte, Solid, or Preact components in the same project. Island architecture hydrates only interactive components. Mix frameworks per component without penalty.
No build step — changes are live immediately after saving in the admin. Deployment is the hosting environment itself. FTP or managed hosting dashboard for updates.
Build step required. Static site generation at deploy time. Deployed to CDN (Vercel, Netlify, Cloudflare Pages). Build times scale with page count but can be optimized with incremental builds.
Natively dynamic — database queries, form processing, user authentication, and server-side logic are built into the platform. Any dynamic feature has a plugin.
Static by default. Dynamic features require server endpoints (Astro API routes), serverless functions, or third-party services. No built-in database, auth, or form processing.
SEO plugins (Yoast, Rank Math) manage metadata, sitemaps, structured data, and social previews. SEO management is GUI-driven and accessible to non-technical users.
SEO metadata defined in frontmatter or component props. Sitemaps generated via @astrojs/sitemap. Structured data added manually. Full control but requires developer involvement for changes.
Ongoing updates for core, themes, and plugins. Database optimization. Security monitoring. Hosting management. Maintenance is a continuous obligation.
Static files on CDN — no server, no database, no runtime to maintain. Dependencies updated via package manager. Security surface is minimal. Maintenance is primarily dependency updates.
When migrating from WordPress to Astro is justified
Migrate to Astro if performance is the primary driver and WordPress cannot meet Core Web Vitals targets despite optimization, the site is content-heavy with minimal dynamic interaction (blogs, documentation, marketing sites), the team prefers working in Markdown/MDX with version-controlled content, or JavaScript bundle size from WordPress themes and plugins is materially impacting user experience and SEO.
Stay on WordPress if non-technical editors need to publish content independently without developer involvement, the site requires built-in dynamic features (user accounts, e-commerce, membership gating) that would need to be assembled from external services in Astro, or the existing plugin ecosystem provides critical functionality that would be expensive to replicate.
A pragmatic middle path is using WordPress as a headless CMS with Astro as the frontend — preserving the editorial experience while gaining Astro's performance characteristics. The WordPress REST API or WPGraphQL plugin makes this straightforward.
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