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 4,178 Fly.io sites with Chrome UX data, p75 values, Sep 2026.

Top countries

United States 2,015

India 883

United Kingdom 751

Australia 684

Canada 629

Germany 542

Brazil 514

France 505

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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