
Description: reCAPTCHA is a free service by Google that protects websites from spam and abuse. It uses advanced risk analysis techniques to tell humans and bots apart. The service provides different versions of CAPTCHAs and captcha alternatives to fit site needs.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: visualCaptcha is a captcha service that uses images instead of text or audio to distinguish humans from bots. It asks users to identify pictures or describe images rather than solving text puzzles.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API