Voiceflow is a tool that allows anyone to develop AI voice apps without coding. With this tool, you can build the logic and structure of an app development system with drag-and-drop blocks. It also offers a user-friendly visual interface, simplifying the workflow of creating voice apps for Google, Alexa, in-car assistants, and chatbots. With Voiceflow's no-code platform, developers can easily create voice assistants for their apps.