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 2,061

28,919

Japan 2,538

22,279

India 1,063

16,626

Brazil 824

12,544

South Korea 1,782

11,314

Germany 1,065

11,646

Italy 874

11,443

United Kingdom 912

11,177

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 mod_ssl sites · All OpenSSL sites