nginx - A high performance free open source web server powering busiest sites on the Internet.
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.
AWS Elastic Load Balancing - Amazon ELB automatically distributes incoming application traffic across multiple Amazon EC2 instances in the cloud.
GeeTest CAPTCHA - GeeTest protects your websites, mobile Apps and APIs from bot threats.
Google Cloud Load Balancing - Google Cloud Load Balancer enables users to scale their applications on Google Compute Engine.
MTcaptcha - Enterprise Captcha solutions