Websites Powered by Fly.io

12,575 websites tracked using Fly.io (PaaS) · fly.io

Fly.io is a platform-as-a-service used to deploy and host the application. Its official site is fly.io. PoweredBy tracks the websites that use Fly.io across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the paas ecosystem.

Usage trend

Core Web Vitals

Median site among 3,638 Fly.io sites with Chrome UX data, p75 values, Jun 2026.

Top countries

United States 2,117

India 954

United Kingdom 775

Australia 717

Canada 691

Germany 583

France 535

Brazil 518

Sites using Fly.io by audience country, Chrome UX Report.

Top sites by authority

The share of the web's most authoritative domains, by Open Page Rank tier, seen running Fly.io in recent crawls. Only 372 domains worldwide score 9 or higher.

Websites using Fly.io

Open Page Rank is the domain's authority score (0 to 10, from the open web link graph); the list is ordered by it and covers sites seen in recent crawls. Visits and keywords are estimated US organic search figures.

Download top 10,000 as CSV (zip) →

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