Google announced in 2022 that the service would be merged into Google Meet, and it was shut down by the end of the year.
Google Duo was announced at Google's developer conference on May 18, 2016, and began its worldwide release on August 16, 2016. Duo could be used either with a phone number or a Google account, allowing users to call someone from their contact list. It let users make and receive one-to-one and group audio and video calls with other Duo users in high definition, using end-to-end encryption by default. Google Duo was a proprietary voice over IP (VoIP) and videotelephony service developed by Google, available for Android, iOS and web browsers.
