Sqreen VS MTcaptcha

OpenSSL - OpenSSL is a free and open source software cryptography library that implements both the Secure Sockets Layer (SSL) and the Transport Layer Security (TLS) protocols, which are primarily used to provide secure communications between web browsers and …

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.

Let's Encrypt - Let’s Encrypt is a free, automated, and open certificate authority brought to you by the Internet Security Research Group (ISRG).

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

Ensighten - Ensighten provides enterprise tag management solutions that enable businesses manage their websites more effectively.

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