LineageOS is a free and open-source operating system based on the Android platform. It is installed on a wide range of phones and tablets from many manufacturers and replaces the stock Android build that came with the device. The project is developed by a community of contributors, provides monthly security updates for supported devices, and includes its own open-source apps and command-line tools. The project states that it extends the life of mobile devices, which matters for organisations that want to keep older hardware in use.
The project is run by The LineageOS Project, and LineageOS LLC is the company behind it. LineageOS LLC is a limited liability company in Washington state. The code is licensed under Apache 2.0 and other licences, so a European organisation can build, audit and maintain its own images without depending on the vendor's service. The privacy policy describes device statistics that users can switch off and log data, but it does not refer to the GDPR.