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

South Korea 2,059

1,782

United States 1,618

2,061

Japan 711

2,538

India 936

1,063

Italy 1,027

874

Germany 724

1,065

Spain 768

899

France 659

986

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_jk sites · All mod_ssl sites