GrapheneOS[b] is an open source, privacy and security-focused Android operating system that runs on selected Google Pixel devices, including smartphones, tablets and foldables.

[6] After the incident, Micay continued working on the Android Hardening project,[6][7] which was renamed as GrapheneOS[7] and announced in April 2019.

"[23] In discussing why services should not force users to install proprietary apps, Lennart Mühlenmeier of netzpolitik.org suggested GrapheneOS as an alternative to Apple or Google.

[24] Svět Mobilně and Webtekno repeated the suggestions that GrapheneOS is a good security- and privacy-oriented replacement for standard Android.

[12] In his initial impressions post a week prior, Lamont said that after an easy install there were issues with permissions for Google's Messages app, and difficulty importing contacts; Lamont then concluded, "Anyone looking for a straightforward experience may want to avoid GrapheneOS or other privacy-oriented Android experiences since the privacy gains often come at the expense of convenience and ease of use.

"[28] In July 2022, Charlie Osborne of ZDNet suggested that individuals who suspect a Pegasus infection use a secondary device with GrapheneOS for secure communication.

[29] In January 2023, a Swiss startup company, Apostrophy AG, announced AphyOS, which is a subscription fee-based Android operating system and services "built atop" GrapheneOS.