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 2,033

29,654

Japan 2,600

22,526

India 1,084

16,898

Brazil 838

12,786

South Korea 1,818

11,243

Germany 1,087

11,844

United Kingdom 924

11,237

Italy 869

11,018

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 mod_ssl sites · All OpenSSL sites