Infusionsoft is the industry's longest-running and most powerful product, offering an all-in-one solution that provides advanced marketing and sales automation, fully customizable campaigns, and powerful app integration.

Keap is a private company that offers an e-mail marketing and sales platform for small businesses, including products to manage and optimize the customer lifecycle, customer relationship management, marketing automation, lead capture, and e-commerce. It is based in Chandler, Arizona.