
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: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: MTcaptcha is an open source CAPTCHA service that aims to provide an accessible and usable CAPTCHA alternative to traditional distorted text CAPTCHAs. It uses interactive tasks like identifying images or audio clips instead of text.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API