
Description: Securimage is an open source CAPTCHA script written in PHP that generates complex image and audio CAPTCHAs. It can help protect websites from spam and abuse.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: GeeTest CAPTCHA is an advanced CAPTCHA service that uses behavior analysis and risk engines to distinguish humans from bots. It aims to provide a more user-friendly CAPTCHA alternative to traditional distorted text CAPTCHAs.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API