Updated

Technology · Web Development

Astro

astro.build
Open source

Astro is an innovative, JavaScript-based static site builder that's rapidly gaining popularity in the web development community. It introduces a unique approach to building websites by allowing developers to use multiple frontend frameworks within the same project, all while generating minimal JavaScript output. Astro's "partial hydration" technique ensures that only interactive components load JavaScript, resulting in exceptionally fast initial page loads. This makes Astro an ideal choice for content-heavy websites that require the flexibility of modern web technologies without compromising on performance.

Astro belongs toJavaScript frameworksStatic site generatorcategories.

30websites

use it — 1.2% of the 2,555 websites we scanned in the last 12 months

#13of 47

tools in its category seen in our scans (we recognize 119)

11public pages

on UptimeCard — open any of them to see how that site is doing

0.88% of all websites we track run Astro

At a glance

UptimeCard's own scans and tests of 2,555 websites · refreshed weekly

How Astro sites scoreout of 100 · hover or tap a score for details

47PerformancePooraverage site: 5090AccessibilityGoodaverage site: 8996Best practicesGoodaverage site: 93100SEOGoodaverage site: 92

Page load time

Loads about as fast as the average site

Astro sites
4.5 s
All sites
4.3 s

Most Astro sites load in 4.0–5.7 s. Home page weight: 3.3 MB vs 3.3 MB for all sites. 10 public sites measured.

Who uses it?

Technology and Software is the biggest group

Technology and Software73%
Software as a Service (SaaS)18%
Financial Services9%

Share of 11 classified public sites. “× average” compares with all 961 public sites.

How Astro sites are built

Closest partners. The number says how many times more often the tool runs on Astro sites than on an average website. Hover a partner for its share of sites.

Cloudflare Browser Insights3×Tailwind CSS3×Amazon S33×

Stacks we see most. Tools that tend to run together with Astro on the same websites. The percentage is the share of all 30 Astro sites that run the whole stack.

4 stacks · swipe, drag or use the arrows
#1

Astro + Amazon CloudFront + AWS Certificate Manager

16.7%5 of 30 sites
#2

Astro + Cloudflare + Tailwind CSS

13.3%4 of 30 sites
#3

Astro + Amazon CloudFront + Amazon S3

13.3%4 of 30 sites
#4

Astro + Tailwind CSS + Amazon S3

13.3%4 of 30 sites

Usually installed alongside

The bigger the bubble, the more of the 30 Astro sites also run the tool. Colour shows what the tool does. Hover or tap a bubble for details.

Google Tag Manager67%Google Analytics50%Cloudflare Browser Insights27%HubSpot Analytics13%OneTrust17%HubSpot17%Microsoft Advertising13%DoubleClick Floodlight10%
Tag managerAnalyticsCookie consentMarketingAdvertising

Similar tools in its category

JavaScript frameworks: 119 tools known, 47 seen in our scans

React644 sitesAlternativeNext.js375 sitesAlternativeVue.js144 sitesAlternativeGSAP138 sitesAlternativeEmotion96 sitesAlternativestyled-components83 sitesAlternativeAngularJS64 sitesAlternativeNuxt.js47 sitesAlternative

How websites combine Astro with other tools

Relationships found on the websites that use it, from the same map status pages show.

Integrates with another 22Complements another tool 7Built on a platform 6

Websites using Astro

30 websites use Astro: 1.2% of the 2,555 websites we scanned in the last 12 months. A selection is shown below.

Scores are out of 100: P Performance · A Accessibility · B Best practices · S SEO. Green 80+, yellow 65–79, orange 50–64, red below 50. The dot shows whether our last scan found the site failing (red) or not (green); Red, amber or blue: an active incident on the site's status page (outage, degraded, maintenance) or a failing scan; amber also means a certificate ending within 30 days. Hover the dot for details.

Questions about Astro

How many websites use Astro?
We found Astro on 30 of the 2,555 websites we scanned in the last 12 months (1.2%). 11 of them have a public status page.
What is Astro often used with?
Among the websites we scan, Astro is often found alongside Cloudflare (56.7% of its sites), Amazon Web Services (40% of its sites), Cloudflare Browser Insights (26.7% of its sites).
What are the alternatives to Astro?
Other JavaScript frameworks we recognize include React, Next.js, Vue.js, GSAP.

Is your website built with Astro?

UptimeCard checks it around the clock, tells you the minute it stops answering, and gives your visitors a status page.

Monitor my site freeCreate a status page