Funnster - The best way to get together with your friends and family
hCaptcha - Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.
Circus - Fastest way to see who's going out and where they are going
GeeTest CAPTCHA - GeeTest protects your websites, mobile Apps and APIs from bot threats.
Gmail - Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.
MTcaptcha - Enterprise Captcha solutions