HTTP/3 vs ParkingCrew

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

Detections for ParkingCrew end in Oct 2023. The fingerprint catalog behind our crawls no longer carries that technology as its own entry, usually because it was retired or split into more specific ones, so its figure is the last recorded and is not directly comparable with a currently tracked technology.

Top sites by authority

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

United States 1,141,651

140

India 531,962

248

Brazil 414,021

82

United Kingdom 386,042

53

Indonesia 294,061

127

Germany 289,537

56

Canada 280,974

40

Italy 273,070

49

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 ParkingCrew sites