HSTS vs Really Simple SSL & Security

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

Top sites by authority

HSTS · 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

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

United States 1,467,206

97,418

United Kingdom 450,618

35,181

Germany 441,210

32,992

India 429,462

30,245

France 366,415

40,734

Brazil 303,175

48,788

Canada 324,872

23,002

Italy 243,977

36,640

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 HSTS sites · All Really Simple SSL & Security sites