Dasha is a conversational AI-as-a-service platform that allows developers to create realistic voice and text conversations for apps and products. It uses a declarative programming language, Dashascript, to design complex real-world conversations. Dasha integrates with existing infrastructure and services, including databases and external services, to provide valuable insights and analytics. It also offers a free tier for testing and building conversational apps. The platform can be used for call centers, lead generation, insurance, and more.