
Description: Kill Bill is an open-source subscription billing and payments platform. It provides companies with the ability to handle subscriptions, metered billing, payments, and invoices all in one place.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: WHMCS is a popular web hosting billing and automation platform. It allows web hosts, resellers, and IT professionals to manage clients, servers, domains, billing, support tickets, and more from one central dashboard.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API