Fly.io vs Vercel

Head-to-head usage across the sites we track.

Top sites by authority

Fly.io · Vercel · how many of each technology's sites sit in the web's highest authority tiers

Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.

By country

Fly.io · Vercel · share of sites in each country using one or the other

United States 2,007

64,958

India 869

45,480

Brazil 500

27,741

United Kingdom 737

22,014

Germany 524

18,471

Canada 620

17,716

France 479

16,996

Indonesia 393

14,431

Audience countries from the Chrome UX Report, top markets of either technology.

Real user performance

Median site's p75 values from the Chrome UX Report, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.

Sites that switched

Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.

All Fly.io sites · All Vercel sites