BigDoor was a company specializing in gamification and loyalty solutions. Its platform provided tools for businesses to enhance user engagement through elements like points, badges, and rewards. BigDoor's services aimed to increase user retention and interaction by incorporating game-like mechanics into websites and applications. The company targeted businesses looking to build and reward customer loyalty in an interactive manner. As of my last update, it's important to verify the current status of BigDoor, as companies in this sector can undergo changes or may no longer be operational.