What is Fly.io?

Hosting

Fly.io is a hosting or cloud platform: Run apps close to users worldwide. Tech Stack Detector identifies Fly.io on any website by analysing HTTP response headers.

Fly.io is a hosting or cloud platform (Hosting), detected on 1 website in our index. See websites using Fly.io ↓

CategoryHosting
Official sitefly.io
Detection signals2 signals
In our index1 website

How Tech Stack Detector detects Fly.io

Fly.io is matched from these signals during a single, ordinary page request. Each one contributes to the confidence score shown on a scan.

  • HeaderFly.io request ID header
  • HeaderServer: Fly

Websites using Fly.io

Recently scanned websites where we detected Fly.io. Open one to see its full technology stack.

www.recordsdevotee.com7 technologies · 7 d ago

Often used with Fly.io

Technologies most frequently detected alongside Fly.io across scanned websites.

Next.jsFramework1 siteGoogle FontsFont1 siteGoogle AnalyticsAnalytics1 siteGoogle WorkspaceOther1 siteReactFramework1 siteNode.jsLanguage1 site

Alternatives to Fly.io

Other Hosting technologies Tech Stack Detector detects: popular alternatives and related tools, most-detected first.

VercelHosting75 sitesNetlifyHosting25 sitesGoogle CloudHosting13 sitesGitHub PagesHosting9 sitesRenderHosting7 sitesPleskHosting5 sitesAmazon S3Hosting4 sitesMicrosoft AzureHosting2 sitesPantheonHosting1 siteWP EngineHosting1 siteAcquiaHostingHerokuHosting

Compare Fly.io

Side-by-side comparisons of Fly.io with other Hosting technologies.

Fly.io vs Vercel Fly.io vs Netlify Fly.io vs Google Cloud Fly.io vs GitHub Pages Fly.io vs Render

Popular technologies

The technologies most often detected across all websites scanned on Tech Stack Detector.

CloudflareCDN247 sitesGoogle FontsFont215 sitesTailwind CSSUI Library170 sitesReactFramework165 sitesProgressive Web AppOther147 sitesPHPLanguage139 sitesNode.jsLanguage136 sitesNext.jsFramework124 sitesBootstrapUI Library119 sitesGoogle WorkspaceOther110 sites

Frequently asked questions

What is Fly.io?

Fly.io is a hosting or cloud platform: Run apps close to users worldwide. Tech Stack Detector identifies Fly.io on any website by analysing HTTP response headers. Its official website is https://fly.io.

How can I tell if a website uses Fly.io?

Enter any URL into Tech Stack Detector and it reports whether Fly.io is present, with a confidence score and the exact evidence it matched. Detection is based on HTTP response headers. No login or crawling of the site is required.

How many websites use Fly.io?

Fly.io has been detected on 1 website in the public Tech Stack Detector scan index. This reflects sites that visitors have analysed here, not global market share.

What are some alternatives to Fly.io?

Other Hosting technologies Tech Stack Detector detects include Vercel, Netlify, Google Cloud, GitHub Pages, Render and Plesk. You can compare any of them side by side with Fly.io.

Data last updated October 20, 2026 · based on 618 recently scanned websites.