Google confirms the Nest Secure has been discontinued It was released in 2017 and never received a direct successor October 19, 2020 https://www.androidpolice.com/2020/10/19/google-confirms-the-nest-secure-has-been-discontinued/ The Verge: Google discontinues its Google Nest Secure alarm system
Google commits to continued Nest Secure support, but not new features; more Detect sensors coming October 28, 2020 https://9to5google.com/2020/10/28/google-nest-secure-detect/ Google: Our continued commitment to Nest Secure