CentOS vs UNIX

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

Top sites by authority

CentOS · UNIX · 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

CentOS · UNIX · share of sites in each country using one or the other

Germany 5,581

41,960

United States 12,631

10,264

Japan 13,364

5,128

India 7,375

4,782

South Korea 6,485

4,910

United Kingdom 5,698

3,718

Spain 5,001

4,256

Italy 6,135

2,902

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 CentOS sites · All UNIX sites