https://techcrunch.com/2017/08/30/amazon-and-microsoft-agree-their-voice-assistants-will-talk-to-each-other/

Those betting big on AI making voice the dominant user interface of the future are not betting so big as to believe their respective artificially intelligent voice assistants will be the sole vocal oracle that Internet users want or need.

And so Microsoft’s Satya Nadella and Amazon’s Jeff Bezos are today announcing a tie-up, which will — at an unspecified point later this year — enable users of the latter’s Alexa voice assistant to ask her to summon Microsoft’s Cortana voice assistant to ask it to do stuff, and vice versa.