If you used Allo, now is the time to get your chat data before it's gone forever. At the time, Google said that "given Messages' continued momentum, we've chose to stop supporting Allo to focus on Message". We've learned a lot from Allo, particularly what's possible when you incorporate machine learning features, like the Google Assistant, into messaging.
Google announced, in late 2017, that it was planning to shutter Allo, its messaging service that never quite resonated with users.
Previously, Google only said that Allo would go away in March, but a banner on the Allo website makes it clear this is it.
To download your chats, Go to Settings and then tap on Chat. Google+ effectively failed after years of troubled operation, and Google Hangouts+ is far from the most popular video chat service out there. It is on the same support page that the company notes "We're saying goodbye to Allo on March 12, 2019".
Hangouts was launched as a replacement for Gchat in 2013.Google Hangouts is a communication platform developed by the company which includes messaging, video chat, SMS and Voice over Internet Protocol (VOIP) features.
To store them, choose where you'd like to store the file. The exported messages are stored in CSV file format and includes details like Conversation name, ID, sender, message type, and message content.
Allo now joins Hangouts, Google+ and Inbox by Gmail in the Google graveyard. To get photos, videos, or any other files shared on Allo, you will have to use the media export option.