mod_jk vs mod_ssl

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

Top sites by authority

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

United States 2,171

2,338

South Korea 2,368

2,113

Japan 844

3,079

India 1,061

1,219

Italy 1,172

1,030

Germany 870

1,266

France 788

1,150

Spain 854

976

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_jk sites · All mod_ssl sites