HTTP/3 vs Prefix-Free

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

Top sites by authority

HTTP/3 · Prefix-Free · 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

HTTP/3 · Prefix-Free · share of sites in each country using one or the other

United States 1,141,651

2,140

India 531,962

1,156

Brazil 414,021

753

United Kingdom 386,042

892

Indonesia 294,061

521

Germany 289,537

1,053

Canada 280,974

860

Italy 273,070

655

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 HTTP/3 sites · All Prefix-Free sites