Microsoft Zo chatbot
Released: December 2016
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.
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.
Microsoft (2018). Zo’s new best friends are some adorable black cats