HTTP/3 vs SWC

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

Top sites by authority

HTTP/3 · SWC · 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 · SWC · share of sites in each country using one or the other

United States 1,141,651

14,692

India 531,962

5,161

Brazil 414,021

3,678

United Kingdom 386,042

6,111

Indonesia 294,061

2,152

Germany 289,537

4,498

Canada 280,974

6,223

Italy 273,070

2,710

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 SWC sites