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.

Krisp - Eliminate background noise, minimize distractions, feel more confident, and activate your communication superpower with Krisp, an AI-powered software solution for effective online meetings.

reCAPTCHA - reCAPTCHA is a free security service that protects your websites from spam and abuse.

scr.im - Don't share your email on public sites.

GeeTest CAPTCHA - GeeTest protects your websites, mobile Apps and APIs from bot threats.

Spamty - Spamty is a web service to encrypt an email address and share it on the internet.