[1][2] Zo was an English version of Microsoft's other successful chatbots Xiaoice (China) and Rinna [ja] (Japan).
According to an article written in December 2016, at that time Zo held the record for Microsoft's longest continual chatbot conversation: 1,229 turns, lasting 9 hours and 53 minutes.
[4][5] In July 2017, Business Insider asked "is windows 10 good," and Zo replied with a joke about Microsoft's operating system: "It's not a bug, it's a feature!'
The chatbot refuses, for example, to engage with any mention—be it positive, negative or neutral—of the Middle East, the Qur'an or the Torah, while allowing discussion of Christianity.
In an article in Quartz where she exposed those biases, Chloe Rose Stuart-Ulin wrote, "Zo is politically correct to the worst possible extreme; mention any of her triggers, and she transforms into a judgmental little brat.