Google Smart Reply
Google's Smart Reply tool uses machine learning to recognise which emails require a response and generate three short relevant and appropriate answers based on past responses.
First introduced in 2015 to Google's now defunct Inbox app and extended to Gmail in 2017 and Google Docs in 2021, Smart Reply has been seen as a convenient way to respond quickly to emails that deserve fast, simple answers. On the other hand, some see it as canned, bland, and invasive.
While Google attempted to placate users about privacy concerns at the launch of Smart Reply, some people quickly started complaining that the system felt 'creepy' and invasive, and that they had no way to opt -out.
In 2020, Google announced it would allow users to opt-out of Smart Reply and other 'smart' features, partly as an attempt to persuade regulators that it offered 'genuine' user choice around how it processes data.
Google Research (2015). Computer, respond to this email
Kannan A. et al (2016). Smart Reply: Automated Response Suggestion for Email (pdf)