Arkose FunCAPTCHA

AWS WAF CAPTCHA

Cloudflare Interstitial CAPTCHA

hCaptcha

hCaptcha (Easy Difficulty)

hCaptcha (Moderate Difficulty)

hCaptcha (Hard Difficulty)

hCaptcha Enterprise

Google reCAPTCHA

Google reCAPTCHA v2 (Easy Difficulty)

Google reCAPTCHA v2 (Moderate Difficulty)

Google reCAPTCHA v2 (Hard Difficulty)

Google reCAPTCHA v3 (Invisible)

Text-based CAPTCHA

Cloudflare Turnstile