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Astro vs SolidJS

Astro logo

Astro

Web Development

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

From
Free
Rated
-
Full reviewWebsite
SolidJS logo

SolidJS

Web Development

Reactive JavaScript framework with no virtual DOM

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; SolidJS much smaller ecosystem than React, so many problems have no off-the-shelf library

Where they differ

Only the attributes on which Astro and SolidJS actually diverge.

Attributes where Astro and SolidJS differ
AttributeAstroSolidJS
Pricing modelopen-sourceOpen source, no licence fee
PlatformsWeb, Node.js, Cloudflare, Vercel, Netlify, AWS, DenoWeb

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

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 SolidJS does not also cover.

Only in SolidJS

  • No virtual DOM
  • Components run once
  • JSX syntax
  • Small bundles

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

SolidJS

  • Interfaces where update performance is the binding constraintnot Astro
  • Teams comfortable with React syntax who want finer-grained reactivitynot Astro
  • Applications where bundle size directly affects the businessnot 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

SolidJS

  • Much smaller ecosystem than React, so many problems have no off-the-shelf library
  • The React-like syntax is misleading: components run once, and React habits produce subtle bugs
  • Smaller hiring pool and fewer learning resources than the mainstream frameworks

Pricing, plan by plan

Astro

Free

No published plan breakdown. See the Astro review.

SolidJS

Free
  • SolidJSFree
    • Full library
    • Commercial use permitted
    • No usage limits

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 SolidJS if

  • You need no virtual dom.
  • You want to start without paying.
  • You also want components run once.
SolidJS review

Questions people ask

Is Astro or SolidJS better?
Neither clearly leads. Astro starts at Free and SolidJS at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Astro or SolidJS?
Astro starts at Free and SolidJS at Free.
Does Astro or SolidJS run on more platforms?
Astro runs on Web, Node.js, Cloudflare, Vercel, Netlify, AWS, Deno. SolidJS runs on Web.
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 SolidJS is typically brought in for.
What can Astro do that SolidJS cannot?
SolidJS covers No virtual DOM, Components run once, JSX syntax, Small bundles.

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
SolidJS: Is SolidJS free?

Yes, open source under the MIT licence.

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
SolidJS: Is SolidJS just React without the virtual DOM?

The syntax is similar but the model is not. Solid components run once and reactivity is fine-grained, so patterns that are correct in React can be wrong in Solid.

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
SolidJS: Why is SolidJS fast?

It compiles away much of the framework and updates individual DOM nodes directly, rather than re-rendering components and diffing a virtual DOM.

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