Gene Munster and Will Thompson:

We asked Siri, Google Assistant, Alexa, and Cortana 800 questions each. This time, Google Assistant was able to answer 86% of them correctly vs. Siri at 79%, Alexa at 61%, and Cortana at 52%.

Their results show that Siri has improved at a rate greater than any other assistant since the last time they tested. That feels right to me. I haven’t documented my results and it’s entirely anecdotal, but Siri feels a lot better to me today than it did last year.

It’s also worth noting that, when it comes to accuracy, Google Assistant is on top followed by Siri, Cortana, and Alexa. That runs counter to what most people talking about these services tend to claim. That could mean that these results are flawed or that everyone believes that Amazon is ahead when they actually aren’t.

I suspect they are accurate, though. Keep in mind, Google was tinkering with voice recognition services back in 2007 when they launched GOOG-411. Amazon didn’t start working on Alexa until sometime around 2010.