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 4,891

97,418

Brazil 1,103

48,788

Spain 1,173

47,706

Japan 885

42,353

France 1,393

40,734

Italy 1,093

36,640

United Kingdom 1,917

35,181

Germany 1,345

32,992

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 PerimeterX sites · All Really Simple SSL & Security sites