According to source familiar with the product’s internal roadmap, Google Hangouts for consumers will be shutting down sometime in 2020. That’s not surprising at all since Google essentially ceased development on the app more than a year ago. But just know, going into 2019, this is indeed your last year to keep using the beloved (?) legacy chat app.

https://9to5google.com/2018/11/30/google-hangouts-shutting-down/