Amazon can easily point to Walmart, Apple can easily point to.. Every other phone that's not an iPhone.
Google is the only one who doesn't have anybody realistic to point to, and no, Bing does not count.
Google is the only one who doesn't have anybody realistic to point to, and no, Bing does not count.
Siri, Alexa etc are even more opaque as they don't give a list of results, rather have deep integration to their own services and can't even be replaced by an alternative.