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 6,680

47,181

United States 14,716

12,287

Japan 15,967

6,172

India 8,682

5,482

South Korea 7,466

5,800

United Kingdom 6,517

4,270

Italy 7,152

3,343

Netherlands 4,616

5,750

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, Jun 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