Flutter (Software Development Kit)

Flutter is an open-source UI software development kit created by Google. It is used to develop cross platform applications for Android, iOS, Linux, macOS, Windows, Google Fuchsia, and the web from a single codebase. First described in 2015 and released in 2017, it has become a cornerstone of modern app development.

The project is maintained primarily by Google engineers with significant contributions from the global open-source community. Because it is software, its 'manufacturing' happens globally through distributed version control systems and cloud infrastructure managed by the Flutter team and community contributors worldwide.

Owned and spearheaded by Google (under the parent company Alphabet Inc.), Flutter represents a strategic investment in the developer ecosystem. It is headquartered in the United States, specifically in Mountain View, California, where Google defines the roadmap and core architecture of the framework.