MailChimp - MailChimp is the best way to design, send, and share email newsletters.
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.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
MTcaptcha - Enterprise Captcha solutions
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
GeeTest CAPTCHA - GeeTest protects your websites, mobile Apps and APIs from bot threats.