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 4,600

83,739

Brazil 1,010

43,852

Spain 1,043

40,106

Japan 765

36,223

France 1,184

32,992

Italy 960

30,741

United Kingdom 1,723

29,953

Germany 1,183

28,990

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 PerimeterX sites · All Really Simple SSL & Security sites