PerimeterX vs Really Simple SSL & Security

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

Top sites by authority

PerimeterX · Really Simple SSL & Security · 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

PerimeterX · Really Simple SSL & Security · share of sites in each country using one or the other

United States 4,735

80,589

Spain 1,091

43,010

Brazil 1,031

41,568

Japan 782

35,636

France 1,230

33,645

Italy 995

32,129

United Kingdom 1,760

29,199

Germany 1,200

27,743

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 PerimeterX sites · All Really Simple SSL & Security sites