What is Astro?
Astro is an open-source web framework focused on content-driven sites, using an islands architecture that renders most of the page to static HTML and hydrates interactive components (from React, Vue, Svelte and others) only where needed. In January 2026 the Astro Technology Company and its core team joined Cloudflare; the project remains MIT-licensed and open source, with community governance unchanged.
Read the full overview
Sources checked 27 September 2026: official website, documentation, Cloudflare announcement.
Key capabilities
- Islands architecture: Static HTML by default, with selective client-side hydration.
- Framework-agnostic components: Use React, Vue, Svelte or others together in one project.
- Content collections: Type-checked content handling for Markdown/MDX-based sites.
Static and content-focused site generation with optional interactivity is its core area, rather than highly dynamic, client-heavy applications.
Choose Astro for content-heavy sites (marketing, docs, blogs) where minimizing shipped JavaScript matters, and where you want to mix components from multiple UI frameworks on the same page rather than committing to one.
Since bundle-size and speed claims depend on how much interactivity a given page needs, measure output size and Core Web Vitals on a representative page rather than assuming a generic performance win.
Technical details
- Access
- See vendor
- Source model
- Open source
- Founded
- 2021
- Pricing model
- Open source
- API
- Not specified
- Website
- astro.build ↗
Official resources
What to verify for your environment
Start from the users, systems and operating responsibilities the tool needs to support.
- Confirm current features, licensing and support terms with the publisher.
- Validate deployment, data location, access control, backup and recovery requirements.
- Test integrations, export paths and a representative operational workflow before committing.
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