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
Astro Starlight 是否比 Docusaurus 更適合文件？
這取決於你最關心的是什麼。Starlight 預設不載入 JavaScript——更快的頁面加載、更佳的 Core Web Vitals，完成。Docusaurus 提供內建版本控制、成熟的插件生態系和深度 React 整合。如果效能是你的首要考慮，選擇 Starlight。如果你需要複雜的文件和版本控制，選擇 Docusaurus。
我可以從 Docusaurus 遷移到 Astro Starlight 嗎？
可以。Astro 有官方遷移指南，老實說過程比你想像的要順利。兩個框架都使用 MDX 和基於檔案的路由，所以你的內容結構會順利轉移。實際工作是將 React 頁面元件轉換為 Astro 元件，並將 Docusaurus 特定的插件替換為 Starlight 等效項或 Astro 整合。你的大多數 MDX 檔案？幾乎不需要改變。
Astro Starlight 是否支援像 Docusaurus 一樣的文件版本控制？
不，沒有原生支援。Docusaurus 有內建版本控制，可以為每個發佈版本快照整個文件目錄——它就是有效。Starlight 讓你自己建置，通常透過基於目錄的版本控制或社群插件。如果版本控制是你工作流程的核心，Docusaurus 在這方面遠遠勝出。
Docusaurus 或 Starlight 哪個框架的搜尋更好？
兩者都開箱即用搜尋功能良好。Docusaurus 使用 Algolia DocSearch（開源專案免費）或本機搜尋插件。Starlight 內建 Pagefind——一個完全靜態的搜尋引擎，在用戶端執行，無外部依賴。Pagefind 更輕量且不需要第三方帳戶。Algolia 提供更多進階搜尋功能（如果你需要），但它是另一項需要管理的服務。
哪些公司使用 Docusaurus vs Astro Starlight？
Docusaurus 為 Meta、Supabase、Figma、Redux 和 Algolia 提供文件服務。Starlight 執行官方 Astro 文件、Biome 和越來越多的開發者工具網站。Docusaurus 有更廣泛的企業採用——它已經存在更長時間，就是這樣。Starlight 的採用速度正在加快。
我可以在 Astro Starlight 中使用 React 元件嗎？
可以。Astro 透過其官方整合支援 React，以及 Vue、Svelte、Solid 和 Preact。你可以將互動式 React 元件作為 Astro islands 放入 Starlight 的 MDX 頁面——它們獨立水合，不會阻擋頁面其餘部分。Docusaurus 是原生 React，所以預設所有東西都是 React。沒有 islands，沒有混合。
Docusaurus 或 Starlight 哪個文件框架更快？
Starlight 開箱即用更快。它預設不載入 JavaScript 並產生純靜態 HTML。Docusaurus 是 React SPA，所以它為用戶端導航載入大量 JS 包。Starlight 頁面通常在 Lighthouse 效能上得分 95-100。Docusaurus 網站根據自訂程度落在 80-95 範圍內。
Docusaurus 和 Starlight 都支援國際化嗎？
支援，兩者都支援 i18n。Docusaurus 有成熟的 i18n 系統，具有基於語言環境的路由、翻譯 JSON 檔案和社群貢獻的翻譯。Starlight 也包括第一級 i18n，具有語言環境路由和內容翻譯。兩者都能很好地處理多語言文件。也就是說，如果你要進行大規模的 i18n 工作，Docusaurus 有更多文件化的模式——更多人走過那條路。
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