The version of Allo rolling out today will store all non-incognito messages by default — a clear change from Google’s earlier statements that the app would only store messages transiently and in non-identifiable form. The records will now persist until the user actively deletes them, giving Google default access to a full history of conversations in the app. Users can also avoid the logging by using Allo’s Incognito Mode, which is still fully end-to-end encrypted and unchanged from the initial announcement.
According to Google, the change was made to improve Allo’s smart reply feature, which generates suggested responses to a given conversation. Like most machine learning systems, the smart replies work better with more data. As the Allo team tested those replies, they decided the performance boost from permanently stored messages was worth giving up privacy benefits of transient storage.
I actually believed Google that Allo was going to come by default end to end encrypted. But this is Google we are writing about, they make their money selling users data to ad companies. I understand the trade off more data collected the better Google assistant will be when you use it. I guess we know what side Google stands by.