WWDC 2016: Apple's Siri and the future of voice vs. Amazon's Alexa Echo, Google Now, Microsoft Cortana | AppleInsider
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Alexa vs. Siri vs. Google: Which Can Carry on a Conversation Best? - The New York Times
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Are Alexa And Siri Considered AI? | Bernard Marr
Siri Vs. Google Assistant Vs. Alexa Vs. Cortana: Which AI Is Best?
:format(png)/cdn.vox-cdn.com/uploads/chorus_image/image/49419043/Screen_Shot_2014-11-06_at_11.46.18_AM.0.0.png "Hey Siri, who's better: you or Alexa? - The Verge")