The chart shows the market share of voice assistants in the U.S.
Best smart speakers and displays with Siri, Alexa or Google - Gearbrain
Voice Search Optimization: 6 Tips to Improve Your Results
Apple's Siri Ditches Bing for Google
How to stop your phone listening to you [+Video]
Siri Does Better Than Expected in Voice Assistant Face Off, But Google Still Leads
Google May Have Finally Made a Truly Usable Voice Assistant
Virtual assistant - Wikipedia
AI virtual Assistants and technologies involved
Chart: Where People Use Voice Assistants
Siri still the most popular intelligent assistant, but usage down significantly, claims report - 9to5Mac
Apple's Siri Is The Most Popular Virtual Assistant In The World: Report - Tech
How big is the voice assistant market?