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Home Assistant is free and open-source software used to enable centralized home automation. It is a smart home controller that serves both as a smart home hub and an integration platform designed for interoperability, allowing users to have a single point of control and enable automating different smart home devices from a central location regardless of manufacturer or brand. The software operates with local control and does not require cloud services, allowing it to function independently of specific Internet of Things (IoT) ecosystems. The user interface can be accessed through web browsers and mobile apps for Android and iOS. Voice commands are supported via virtual assistants including Google Assistant, Amazon Alexa, Apple Siri, and Home Assistant's built-in "Assist" local voice assistant.