
Description: Billsby is an invoicing and billing software designed for freelancers, consultants, and small business owners. It allows you to easily create professional invoices, track payments and expenses, manage clients and projects, and automate billing and collections.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Zuora is a software-as-a-service subscription management platform that allows companies to launch and manage subscription business models. It handles billing, payments, revenue recognition, and subscription metrics across web, social, mobile, and IoT channels.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API