The battle for digital assistants is getting fiercer, with more large companies developing their own solutions that are eventually installed on software and hardware products aimed at consumers and enterprises worldwide. So far Cortana and Google Assistant are the most accurate.

When it comes to incorrect responses, Alexa and Siri topped the charts, with Apple’s assistant even recording an increase from the previous year.

“Alexa had the most incorrect responses, but also scaled the number of questions responded to the most by far. Siri was right there with Alexa in the number of incorrect answers, but this only increased marginally over the 2017 results,” a Stone Temple report reads.