Blank Slate is a web platform that provides APIs for developing, sharing, monetizing, and monitoring web applications, aiming to simplify the application development process with real-time analytics and infrastructure support. The platform allows users to manage data and users without coding, integrates with payment gateways, and offers significant business and technical benefits including speed to market and reduced capital expenditures. The beta customer program invites developers and business people to join, providing resources such as a free account, developer guides, and community support.