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 2,015

69,629

India 883

48,744

Brazil 514

29,756

United Kingdom 751

23,650

Germany 542

19,269

Canada 629

18,947

France 505

18,233

Spain 423

15,788

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, Sep 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