Artificial Intelligence (AI) is a technology that has revolutionized the world. It has made many tasks easier and faster, and also opened up new avenues for innovation and creativity. AI systems are used in various fields, such as healthcare, finance, education, transportation, and more. In this article, we will compare and contrast three AI systems, namely, Siri, Alexa, and Google Assistant. Siri is an AI-powered virtual assistant developed by Apple Inc. It was first introduced in 2011 and is available on all Apple devices, including iPhones, iPads, Macs, and Apple Watches. Siri is designed to perform various tasks, such as answering questions, sending messages, making calls, setting reminders, and more. It uses natural language processing (NLP) to understand and respond to user requests. Alexa is another AI-powered virtual assistant developed by Amazon. It was first introduced in 2014 and is available on Amazon's Echo devices, which include the Echo Dot, Echo Show, and Echo Spot.