Docusaurus vs Astro Starlight: Best Docs Framework 2026
React SPA docs vs zero-JS static documentation
Choose Docusaurus if you need built-in doc versioning, a mature React plugin ecosystem, and SPA-style navigation. Choose Astro Starlight if you prioritize page load performance, zero-JS output, and the ability to use components from any framework. Both support MDX and file-based routing — the deciding factors are versioning needs and performance requirements.
Docusaurus
React-powered documentation framework with built-in versioning and search
Astro Starlight
Zero-JS documentation theme built on Astro with Pagefind search
Feature Comparison
| Feature | Docusaurus | Astro Starlight |
|---|---|---|
| Dark mode | ✓ | ✓ |
| MDX support | ✓ | ✓ |
| Zero-JS output | ✗ | ✓ |
| Blog integration | ✓ | Via Astro integration |
| Full-text search | ✓ | ✓ |
| Plugin ecosystem | ✓ | Via Astro integrations |
| File-based routing | ✓ | ✓ |
| Built-in doc versioning | ✓ | ✗ |
| Custom pages (non-docs) | ✓ | ✓ |
| Multi-framework components | ✗ | ✓ |
| Internationalization (i18n) | ✓ | ✓ |
| Automatic sidebar generation | ✓ | ✓ |
What is Docusaurus?
Docusaurus is Meta's open-source documentation framework built on React. It provides out-of-the-box doc versioning, Algolia-powered search, i18n, and a plugin system. As a React SPA, it ships client-side JavaScript for navigation but trades initial load performance for smooth in-app page transitions.
What is Astro Starlight?
Astro Starlight is the official documentation theme from the Astro team. It leverages Astro's island architecture to ship zero JavaScript by default, producing pure static HTML pages. It includes Pagefind for client-side search, built-in i18n, and supports MDX alongside standard Markdown with components from any framework.
Key Differences
JavaScript Output and Performance
This is the biggest architectural difference. Docusaurus is a React SPA that ships ~200-300KB of JavaScript for client-side navigation and hydration. Starlight ships zero JavaScript by default, producing pure static HTML. Pages only load JS when you explicitly add interactive island components. This gives Starlight a significant edge in Lighthouse scores and Core Web Vitals.
Doc Versioning
Docusaurus has first-class versioning built in — a single CLI command snapshots your entire docs directory, creates a version dropdown, and manages routing automatically. Starlight has no native versioning. You'd need to manage version directories manually or use community solutions. For teams shipping versioned software with corresponding versioned docs, this is a major Docusaurus advantage.
Component Framework Support
Docusaurus is React-only. Every custom component, page, and theme override is written in React/JSX. Starlight runs on Astro's island architecture, which supports React, Vue, Svelte, Solid, Preact, and native Astro components. You can mix frameworks within the same page. For polyglot teams or projects migrating between frameworks, Starlight is far more flexible.
Search Implementation
Docusaurus integrates with Algolia DocSearch (free for open-source projects) and offers local search plugins. Starlight includes Pagefind, a Rust-based static search engine that generates a search index at build time and runs entirely client-side. Pagefind requires zero configuration and no external accounts, while Algolia offers more advanced features like typo tolerance and analytics.
Build Tooling and Speed
Docusaurus uses Webpack by default (with experimental Rspack support). Starlight uses Vite through Astro. For large documentation sites with hundreds or thousands of pages, Vite's build speed advantage becomes pronounced. Starlight also benefits from Astro's content collections API, which provides typed frontmatter validation and efficient content querying at build time.
Performance Comparison
| Metric | Docusaurus | Astro Starlight |
|---|---|---|
| TTFB | Fast on CDN, SPA hydration adds FCP delay | Excellent — pure HTML with no hydration overhead |
| Build tool | Webpack (default) / experimental Rspack | Vite |
| Base JS bundle | ~200-300KB | ~0KB (zero JS by default) |
| Lighthouse range | 80-95 | 95-100 |
| Client-side navigation | Full SPA with prefetching | Standard MPA navigation (View Transitions optional) |
SEO Comparison
| SEO Feature | Docusaurus | Astro Starlight |
|---|---|---|
| SSG support | ✓ | ✓ |
| SSR support | ✗ | ✓ |
| Schema markup | ✓ | ✓ |
| Meta tag control | ✓ | ✓ |
| Sitemap generation | ✓ | ✓ |
| Canonical URL management | ✓ | ✓ |
Docusaurus
- Built-in doc versioning snapshots your entire docs tree per release — no manual directory management.
- Mature plugin ecosystem with community extensions for analytics, search, diagrams, and more.
- Deep React integration means your existing React component library works out of the box.
- Backed by Meta with broad enterprise adoption by companies like Supabase, Figma, and Redux.
- SPA client-side navigation provides instant page transitions after initial load.
- Ships a significant JavaScript bundle (~200-300KB) even for purely static content pages.
- Locked into the React ecosystem — no native support for Vue, Svelte, or other frameworks.
- Webpack-based builds can be slow for very large documentation sites with thousands of pages.
- Customizing the theme beyond CSS requires understanding Docusaurus's swizzling system, which has a learning curve.
Astro Starlight
- Ships zero JavaScript by default — pages are pure static HTML, yielding near-perfect Lighthouse scores.
- Framework-agnostic island architecture lets you use React, Vue, Svelte, Solid, or Preact components side by side.
- Pagefind provides fully client-side static search with no external service dependencies or API keys.
- Vite-powered builds are significantly faster than Webpack, especially as page count grows.
- Clean, accessible default theme requires minimal customization to look professional.
- No built-in doc versioning — you'll need manual directory structures or community plugins.
- Younger ecosystem means fewer dedicated docs plugins compared to Docusaurus.
- Standard multi-page navigation lacks the instant SPA transitions Docusaurus provides (View Transitions API helps but isn't equivalent).
- Astro's .astro component syntax is unique — new developers need to learn it even if they know React.
When to Choose Docusaurus
- Your documentation requires versioning tied to software releases and you want that handled automatically.
- Your team is already invested in React and wants to reuse existing components in docs.
- You need a battle-tested framework with extensive community plugins and proven enterprise adoption.
- SPA-style instant navigation between docs pages matters more than initial page load weight.
When to Choose Astro Starlight
- Page performance and Core Web Vitals scores are a top priority for your documentation site.
- You want to use components from multiple frameworks (React, Vue, Svelte) within the same docs site.
- Your docs don't require version snapshots, or you're comfortable implementing versioning manually.
- You prefer Vite's fast build times and want a modern, lightweight toolchain.
Can You Migrate?
Yes. We've migrated 5,000+ sites between platforms. We handle data migration, content modeling, frontend rebuilds, and SEO preservation. Every migration is zero-downtime.
Frequently Asked Questions
Is Astro Starlight better than Docusaurus for documentation?
It depends on what you care about most. Starlight ships zero JavaScript by default — faster page loads, better Core Web Vitals, done. Docusaurus brings built-in versioning, a mature plugin ecosystem, and deep React integration. Pick Starlight if performance is your top priority. Pick Docusaurus if you need complex documentation with versioning.
Can I migrate from Docusaurus to Astro Starlight?
Yes. Astro has an official migration guide, and honestly the transition is smoother than you'd expect. Both frameworks use MDX and file-based routing, so your content structure carries over cleanly. The real work is converting React page components to Astro components and swapping Docusaurus-specific plugins for Starlight equivalents or Astro integrations. Most of your MDX files? Minimal changes needed.
Does Astro Starlight support doc versioning like Docusaurus?
Not natively, no. Docusaurus has built-in versioning that snapshots your entire docs directory per release — it just works. Starlight makes you roll your own, usually through directory-based versioning or community plugins. If versioning is central to your workflow, Docusaurus wins this one by a wide margin.
Which framework has better search: Docusaurus or Starlight?
Both handle search well out of the box. Docusaurus uses Algolia DocSearch (free for open-source projects) or a local search plugin. Starlight ships with Pagefind — a fully static search engine that runs client-side with no external dependencies. Pagefind's lighter and needs no third-party accounts. Algolia gives you more advanced search features if you need them, but it's another service to manage.
What companies use Docusaurus vs Astro Starlight?
Docusaurus powers documentation for Meta, Supabase, Figma, Redux, and Algolia. Starlight runs the official Astro docs, Biome, and a growing list of developer tool sites. Docusaurus has broader enterprise adoption — it's been around longer, simple as that. Starlight's adoption is accelerating fast though.
Can I use React components in Astro Starlight?
Yes. Astro supports React through its official integration, along with Vue, Svelte, Solid, and Preact. You can drop interactive React components into Starlight's MDX pages as Astro islands — they hydrate independently without blocking the rest of the page. Docusaurus is React-native, so everything's React by default. No islands, no mixing.
Which documentation framework is faster: Docusaurus or Starlight?
Starlight's faster out of the box. It ships zero JavaScript by default and produces pure static HTML. Docusaurus is a React SPA, so it ships a substantial JS bundle for client-side navigation. Starlight pages typically score 95-100 on Lighthouse performance. Docusaurus sites land in the 80-95 range, depending on how much you've customized them.
Do Docusaurus and Starlight both support internationalization?
Yes, both support i18n. Docusaurus has a mature i18n system with locale-based routing, translation JSON files, and community-contributed translations. Starlight also includes first-class i18n with locale routing and content translation. Both handle multilingual docs well. That said, if you're doing large-scale i18n work, Docusaurus has more documented patterns for it — more people have been down that road.
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