Websites Powered by Fly.io

14,544 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 4,373 Fly.io sites with Chrome UX data, p75 values, Oct 2026.

Top countries

United States 2,086

India 848

United Kingdom 791

Australia 697

Canada 654

Brazil 562

Germany 561

France 511

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

Usage by industry

Share of each industry's websites with a detected stack that use Fly.io; industries come from what sites declare in their own structured data.

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) →

Columns: domain, Open Page Rank, first seen, last seen, industry (from the site's own structured data, blank when none).

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