Microsoft Zo chatbot

Zo was a chatbot developed by Microsoft that interacted with users on multiple social media platforms and mobile apps with the aim of training its language model.

Released in December 2016, Zo was an English version of Microsoft's Xiaoice (XiaoBing) chatbot, and a successor to the company's controversial Tay chatbot.

Unlike Tay, Microsoft had installed safeguards to stop Zo uttering racist and offensive responses. However, the bot did not prove difficult to demonstrate it contained religious and other biases, and it was finally shut down in September 2019.