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Astro vs Caddy

Astro logo

Astro

Web Development

Web framework for content-driven sites shipping minimal JavaScript by default

From
Free
Rated
-
Full reviewWebsite
Caddy logo

Caddy

Cloud

Web server with automatic HTTPS by default

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Astro limited to static site generation and server-side rendering; real-time applications requiring constant client-server communication are unsuitable; Caddy smaller ecosystem than Nginx, so third-party guides and modules are fewer

Where they differ

Only the attributes on which Astro and Caddy actually diverge.

Attributes where Astro and Caddy differ
AttributeAstroCaddy
Pricing modelopen-sourceOpen source, no licence fee
PlatformsWeb, Node.js, Cloudflare, Vercel, Netlify, AWS, DenoLinux, macOS, Windows, Docker
CategoryWeb DevelopmentCloud

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Astro

Nothing recorded that Caddy does not also cover.

Only in Caddy

  • Automatic HTTPS
  • Caddyfile
  • Reverse proxy
  • Single binary

What people use each for

The jobs each tool is most often brought in to do.

Astro

  • Marketing websites and landing pages prioritising performance and SEOnot Caddy
  • Documentation and blog platforms with high page volumesnot Caddy
  • E-commerce storefronts where page speed affects conversion ratesnot Caddy
  • Portfolio and personal websites showcasing static content with minimal interactivitynot Caddy
  • Multi-language sites requiring efficient content management and translationnot Caddy
  • JAMstack projects integrating headless CMS platforms (Contentful, Sanity, Strapi)not Caddy

Caddy

  • Sites and services where expired certificates have caused outages beforenot Astro
  • Small deployments where Nginx configuration is more effort than the problem warrantsnot Astro
  • Reverse proxying internal services with TLS without a certificate workflownot Astro

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Astro

  • Limited to static site generation and server-side rendering; real-time applications requiring constant client-server communication are unsuitable
  • Smaller ecosystem compared to Next.js; fewer third-party component libraries and integrations readily available
  • Build time increases with large content volumes (1,000+ pages); incremental builds not yet as optimised as Gatsby or Next.js
  • API routes and serverless functions are less mature than Next.js; complex backend integrations require additional tooling

Caddy

  • Smaller ecosystem than Nginx, so third-party guides and modules are fewer
  • Adding plugins means rebuilding the binary rather than loading a module
  • Under very high throughput Nginx generally still benchmarks ahead
  • Automatic certificate issuance needs outbound internet access, which complicates air-gapped deployments

Pricing, plan by plan

Astro

Free

No published plan breakdown. See the Astro review.

Caddy

Free
  • CaddyFree
    • Full functionality
    • Commercial use permitted
    • Community support

Which should you pick?

Choose Astro if

  • You want to start without paying.
  • You work on Web, Node.js, Cloudflare, Vercel, Netlify, AWS, Deno.
Astro review

Choose Caddy if

  • You need automatic https.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Docker.
  • You also want caddyfile.
Caddy review

Questions people ask

Is Astro or Caddy better?
Neither clearly leads. Astro starts at Free and Caddy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Astro or Caddy?
Astro starts at Free and Caddy at Free.
Does Astro or Caddy run on more platforms?
Astro runs on Web, Node.js, Cloudflare, Vercel, Netlify, AWS, Deno. Caddy runs on Linux, macOS, Windows, Docker.
Can I use Astro for free?
Both have a free tier, so you can try either at no cost before committing.
What is Astro best used for?
Astro is most often used for marketing websites and landing pages prioritising performance and seo, documentation and blog platforms with high page volumes, e-commerce storefronts where page speed affects conversion rates, portfolio and personal websites showcasing static content with minimal interactivity. Of those, marketing websites and landing pages prioritising performance and seo and documentation and blog platforms with high page volumes are not what Caddy is typically brought in for.
What can Astro do that Caddy cannot?
Caddy covers Automatic HTTPS, Caddyfile, Reverse proxy, Single binary.

Answered from the vendors’ own pages

Astro: Is Astro free?

Yes. Astro is free and open-source under MIT licence. Deployment hosting (Vercel, Netlify, Cloudflare, AWS) may incur costs depending on usage.

Source
Caddy: Is Caddy free?

Yes, open source under the Apache 2.0 licence, free for commercial use.

Astro: Can I use React components in Astro?

Yes. Astro supports React, Vue, Svelte, Preact, and Solid components. Components are server-rendered by default; add client: directives to enable client-side interactivity only where needed.

Source
Caddy: What does automatic HTTPS mean?

Caddy obtains certificates from Let’s Encrypt or ZeroSSL on first request and renews them before expiry, with no cron job or configuration.

Astro: How does Astro compare to Next.js for performance?

Astro achieves superior Core Web Vitals scores (66% pass rate vs Next.js 30%) by shipping minimal JavaScript. Next.js defaults to client-side rendering; Astro renders on the server by default.

Source
Caddy: Caddy or Nginx?

Caddy is dramatically simpler to configure and removes certificate management. Nginx has the larger ecosystem and better peak throughput.

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