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 5,653

42,794

United States 12,731

10,735

Japan 13,559

5,244

India 7,525

4,868

South Korea 6,436

4,959

United Kingdom 5,735

3,746

Brazil 5,371

3,701

Netherlands 3,854

5,094

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 CentOS sites · All UNIX sites