StackPath - Secure Content Delivery Network, DDoS, WAF Service
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.
Avast - Avast security software products are developed for Microsoft Windows, Mac OS X, Android and Linux users by AVAST Software.
MTcaptcha - Enterprise Captcha solutions
Flexera Software Vulnerability Manager - Flexera Software Vulnerability Manager provides solutions to continuously track, identify and remediate vulnerable applications.
GeeTest CAPTCHA - GeeTest protects your websites, mobile Apps and APIs from bot threats.