mod_ssl vs OpenSSL

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

Top sites by authority

mod_ssl · OpenSSL · 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

mod_ssl · OpenSSL · share of sites in each country using one or the other

United States 2,338

33,851

Japan 3,079

26,387

India 1,219

19,124

Brazil 926

14,179

Germany 1,266

13,830

South Korea 2,113

12,915

Italy 1,030

13,124

United Kingdom 1,049

12,773

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 mod_ssl sites · All OpenSSL sites