Static site generators transform templates and content into pre-built HTML pages that load instantly, cost almost nothing to host, and provide excellent security by eliminating server-side processing. In 2026, the SSG landscape ranges from content-focused tools that ship zero JavaScript to full-stack frameworks that blur the line between static and dynamic.

This guide compares five leading static site generators across performance, developer experience, ecosystem, and ideal use cases.

What to Consider When Choosing an SSG

• Build performance: How fast does the site build, especially at scale (thousands of pages)
• Runtime performance: How much JavaScript ships to the browser
• Content integration: Markdown, MDX, CMS, database, and API support
• Framework: React, Vue, Svelte, or template-based
• Flexibility: Static-only or hybrid static/server rendering
• Ecosystem: Plugins, themes, community, and documentation

Astro

Astro has emerged as the leading choice for content-driven websites. Its island architecture ships zero JavaScript by default, hydrating only the interactive components that need it. The result is exceptionally fast websites.

Architecture

Astro’s island architecture is its defining innovation. Static HTML is rendered at build time. Interactive components (islands) are hydrated individually with the exact JavaScript framework you choose: React, Vue, Svelte, Preact, Solid, Alpine, or Lit.

Each island loads independently, meaning a slow-loading interactive widget does not block the rest of the page. The client:visible directive defers hydration until the component enters the viewport, and client:idle waits until the browser is idle.

---
import Header from '../components/Header.astro';
import SearchWidget from '../components/SearchWidget.tsx';
---
<Header />
<!-- Only this component ships JavaScript -->
<SearchWidget client:visible />

Content

Astro’s Content Collections provide type-safe content management for Markdown and MDX files. Schemas validate frontmatter with Zod, catching errors at build time rather than runtime. The content layer API connects to external data sources including headless CMS platforms, databases, and APIs.

MDX support lets you embed components directly in Markdown content. This is powerful for documentation sites, blogs, and educational content where interactive examples enhance the reading experience.

Performance

Astro sites consistently achieve perfect or near-perfect Lighthouse scores because most pages ship zero JavaScript. For content sites, blogs, documentation, and marketing pages, this performance advantage is significant for SEO and user experience.

Build times are fast for typical sites. For very large sites (10,000+ pages), Astro’s build performance is competitive though not as fast as Hugo.

Ecosystem

The Astro integration catalog includes adapters for Vercel, Netlify, Cloudflare, Node.js, and Deno. Official integrations cover Tailwind CSS, image optimization, sitemap generation, and RSS feeds. Starlight is Astro’s documentation theme that rivals dedicated documentation tools.

Pricing

Astro is free and open-source.

[Try Astro free]

Next.js

Next.js by Vercel is the most popular React framework and can function as a static site generator, server-side rendered application, or a hybrid of both. Its flexibility makes it suitable for everything from marketing sites to complex web applications.

Architecture

Next.js supports multiple rendering strategies per page: Static Site Generation (SSG), Server-Side Rendering (SSR), Incremental Static Regeneration (ISR), and client-side rendering. The App Router (introduced in Next.js 13) uses React Server Components to render on the server by default with client components opted in as needed.

Static export mode generates a fully static site with no server required. This mode works for sites that do not need dynamic server-side features but limits some Next.js capabilities.

For hybrid sites, ISR revalidates static pages in the background. A product page can be statically generated at build time and automatically updated when the product data changes, without a full rebuild.

Content

Next.js does not have built-in content management. You integrate with headless CMS platforms, databases, or local Markdown files using data fetching functions. Libraries like Contentlayer, next-mdx-remote, and Velite provide structured content management on top of Next.js.

The flexibility is both a strength and weakness. You can integrate with any data source but must set up the integration yourself.

Performance

Next.js ships more JavaScript than Astro by default because the React runtime is included. Optimizations like automatic code splitting, tree shaking, and React Server Components reduce the payload, but a Next.js site will generally be heavier than an equivalent Astro site for content-focused pages.

For interactive applications where React is already needed for the UI, the additional JavaScript is justified. For content sites where interactivity is minimal, the overhead is harder to justify.

Build times for large static sites can be significant. ISR mitigates this by building pages on-demand rather than all at once.

Ecosystem

Next.js has the largest ecosystem of any SSG. The React component ecosystem, Vercel’s platform optimizations, and thousands of tutorials and examples make it the safe choice for teams with React experience.

Pricing

Next.js is free and open-source. Vercel hosting offers a free tier with paid plans starting at $20/month per team member.

[Check Vercel pricing for Next.js hosting]

Hugo

Hugo is the fastest static site generator by build speed. Written in Go, it compiles thousands of pages in seconds. For large content sites, documentation sites, and any project where build performance is critical, Hugo is unmatched.

Architecture

Hugo is a standalone binary with no dependencies. Download it, run hugo, and your site builds. There is no JavaScript ecosystem to manage, no package.json, no node_modules. This simplicity is refreshing for developers tired of JavaScript toolchain complexity.

Templates use Go’s html/template and text/template packages. The templating language is functional and capable but has a learning curve for developers accustomed to JavaScript frameworks.

Hugo’s module system lets you import themes, components, and content from Git repositories. Hugo Pipes provides asset processing including SCSS compilation, PostCSS, JavaScript bundling, and image optimization without external build tools.

Content

Hugo excels at Markdown-based content with rich frontmatter support. Content organization uses a directory structure that maps to URL paths. Taxonomies (tags, categories, series) are built-in with automatic listing pages.

Multilingual support is first-class, with per-language content directories, translation linking, and locale-specific configuration. For multilingual sites, Hugo’s i18n support is the most comprehensive of any SSG.

Shortcodes provide reusable content snippets that can be embedded in Markdown. Built-in shortcodes handle figures, highlights, YouTube embeds, and more.

Performance

Hugo builds are measured in milliseconds per page. A site with 10,000 pages builds in about 10 seconds. For comparison, the same site might take minutes with JavaScript-based SSGs. The Go binary starts instantly with no warm-up time.

The generated output is plain HTML with optional JavaScript added through templates or Hugo’s js.Build function. Sites are as lightweight as you make them.

Ecosystem

Hugo’s theme ecosystem is extensive, with hundreds of free themes for blogs, documentation, portfolios, and business sites. The community is active, and the documentation is thorough.

The limitation is that Hugo is not a JavaScript framework. If you need React components, interactive islands, or client-side state management, Hugo requires you to bring your own JavaScript setup.

Pricing

Hugo is free and open-source.

[Try Hugo free]

Gatsby

Gatsby is a React-based static site generator that pioneered the concept of a data layer for static sites. While it has lost market share to Next.js and Astro, Gatsby remains a capable tool for specific use cases, particularly when paired with its data layer and plugin ecosystem.

Architecture

Gatsby uses React for rendering and GraphQL as its data layer. At build time, Gatsby sources data from multiple sources (files, CMS, APIs, databases), normalizes it into a unified GraphQL schema, and generates static HTML pages with hydrated React.

The GraphQL data layer is both Gatsby’s signature feature and its most divisive. Proponents appreciate the unified query interface across data sources. Critics find it adds unnecessary complexity for simple sites.

Deferred Static Generation (DSG) builds less-visited pages on the first request rather than at build time, reducing build times for large sites.

Content

Gatsby’s plugin system connects to virtually any content source. gatsby-source-filesystem reads local files, gatsby-source-contentful connects to Contentful, and dozens of other source plugins integrate with headless CMS platforms, databases, and APIs.

gatsby-plugin-mdx provides MDX support with component embedding in Markdown. Image optimization through gatsby-plugin-image generates responsive images with blur-up placeholders and lazy loading.

Performance

Gatsby generates optimized static HTML with prefetching for fast page transitions. The client-side React hydration enables smooth navigation without full page reloads. Performance is good but ships more JavaScript than Hugo or Astro.

Build times have been a persistent criticism. Large Gatsby sites can take many minutes to build, though Gatsby Cloud (now part of Netlify) and incremental builds have improved this.

Ecosystem

Gatsby’s plugin ecosystem is extensive with over 3,000 plugins. However, many plugins are unmaintained as the community has shifted to Next.js and Astro. The official Gatsby team continues to maintain core plugins.

Pricing

Gatsby is free and open-source.

[Try Gatsby free]

Eleventy (11ty)

Eleventy is a simpler, more flexible SSG that embraces the fundamentals of static site generation without framework lock-in. It transforms templates into HTML using your choice of templating language, ships zero JavaScript by default, and stays out of your way.

Architecture

Eleventy is configuration-driven rather than convention-driven. It supports eleven templating languages including Liquid, Nunjucks, Handlebars, Mustache, EJS, HAML, Pug, JavaScript templates, HTML, Markdown, and custom engines.

The zero-JavaScript output is default. If you want client-side interactivity, you add it explicitly. There is no framework runtime, no hydration, and no virtual DOM. The output is exactly what your templates produce.

Eleventy 3.0 is ESM-first, supports async configuration, and integrates with modern JavaScript tooling while maintaining its simple, template-driven core.

Content

Eleventy handles Markdown, JSON, and JavaScript data sources natively. The data cascade merges data from global data files, directory data files, frontmatter, and computed data in a predictable order.

Pagination generates pages from data collections. A single template can produce hundreds of pages from a data file, CMS API response, or directory of content files.

Collections group content by tags, enabling blog archives, category pages, and related content lists. Custom collection APIs provide programmatic control over content grouping.

Performance

Eleventy builds are fast, though not as fast as Hugo. For sites under 10,000 pages, build times are typically under 30 seconds. The generated HTML is minimal since no framework runtime is bundled.

Runtime performance is excellent because the output is plain HTML. Lighthouse scores are naturally high without optimization effort.

Ecosystem

Eleventy’s plugin ecosystem is smaller but focused. Official plugins cover image optimization, RSS feeds, syntax highlighting, and server-side rendering. The WebC component format provides single-file components for Eleventy.

The community values simplicity and web standards. Eleventy users tend to prefer minimal tooling and progressive enhancement over framework-heavy approaches.

Pricing

Eleventy is free and open-source.

[Try Eleventy free]

Comparison Table

Feature	Astro	Next.js	Hugo	Gatsby	Eleventy
Language	JS/TS	JS/TS (React)	Go	JS/TS (React)	JS/TS
Default JS	Zero	React runtime	Zero	React runtime	Zero
Build Speed	Fast	Moderate	Fastest	Slow	Fast
Rendering	Static + Islands	SSG/SSR/ISR	Static	SSG + DSG	Static
Content	Collections + MDX	Bring your own	Markdown + Shortcodes	GraphQL layer	Markdown + Data
Frameworks	Any	React	None (templates)	React	None (templates)
Learning Curve	Low-Medium	Medium	Medium (Go templates)	Medium-High	Low

Which SSG Should You Choose?

Choose Astro if you are building a content-focused website (blog, docs, marketing) and want the best performance with the flexibility to use any UI framework for interactive components.

Choose Next.js if you are building a React application that needs both static pages and dynamic server-rendered pages, or if your team is already proficient with React.

Choose Hugo if build speed is critical, you prefer a standalone binary without JavaScript dependencies, or you are building a large multilingual content site.

Choose Gatsby if you have an existing Gatsby project or need the GraphQL data layer for integrating multiple content sources into a unified schema.

Choose Eleventy if you value simplicity, want zero framework lock-in, and prefer to work with standard templating languages and progressive enhancement.

The Trend Toward Hybrid

The boundary between static site generators and full-stack frameworks continues to blur. Astro now supports server-side rendering. Next.js supports static export. Even Hugo can integrate with JavaScript build tools.

The trend is toward frameworks that let you choose the rendering strategy per page or per component. Start with static HTML for content pages, add server rendering for personalized pages, and hydrate individual components for interactivity. This hybrid approach delivers the performance of static sites with the capabilities of dynamic applications.