HSTS vs reCAPTCHA

HSTS is the more common of the two in our index: it runs on 29,823 websites against 6,001 for reCAPTCHA, and 3,002 sites use both. Counts come from real scans, not vendor claims.

HSTS: 29,823
reCAPTCHA: 6,001

HSTS

HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.

Indexed sites: 29,823
Share of Security: 72%

Well-known sites using it

All 29,823 sites

reCAPTCHA

reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.

Indexed sites: 6,001
Share of Security: 15%

Well-known sites using it

All 6,001 sites

Used together

3,002 sites run both HSTS and reCAPTCHA. That is 50% of the sites using reCAPTCHA, the smaller of the two.

More comparisons

Cloudflare Bot Management vs HSTSSecurity
Cloudflare Turnstile vs HSTSSecurity
Cloudflare Bot Management vs reCAPTCHASecurity
Cloudflare Bot Management vs Cloudflare TurnstileSecurity
Cloudflare Turnstile vs reCAPTCHASecurity

Want to know which one a particular site uses? Look it up and see its whole stack, or compare two sites side by side.