Stadia was a cloud gaming service developed and operated by Google. Known in development as Project Stream, the service debuted through a closed beta in October 2018, and publicly launched in November 2019. Stadia was accessible through Chromecast Ultra and Android TV devices, on personal computers via the Google Chrome web browser and other Chromium-based browsers, Chromebooks and tablets running ChromeOS, and the Stadia mobile app on supported Android devices. There was also an experimental mode with support for all Android devices that were capable of installing the Stadia mobile app. In December 2020, Google released an iOS browser-based progressive web application for Stadia, enabling gameplay in the Safari browser.

Google LLC is an American multinational corporation and technology company focusing on online advertising, search engine technology, cloud computing, computer software, quantum computing, e-commerce, consumer electronics, and artificial intelligence (AI). It has been referred to as "the most powerful company in the world" and is one of the world's most valuable brands due to its market dominance, data collection, and technological advantages in the field of AI. Google's parent company, Alphabet Inc. is one of the five Big Tech companies, alongside Amazon, Apple, Meta, and Microsoft.