The document discusses the rise of intelligent virtual assistants created by major technology companies to compete with Siri. It outlines how the "big five" companies (Microsoft, Amazon, Google, Facebook, and Apple) are working to develop more intelligent assistants that can be integrated with their messaging apps to gain large user bases. Each assistant is compared based on its intended audience, level of proficiency, notable features, appearance, and release date. The top messaging apps are also overviewed based on metrics like monthly active users and key features.