While Sonos lacks the global name recognition Apple clearly carries, it has a leg up on the HomePod with compatibility (or planned compatibility) for Google Assistant, Amazon Alexa and, yes, Apple’s Siri.
“Sonos is offering a special limited deal for its new Sonos One smart speaker, which works with Amazon’s Alexa right now, and is gaining support for Google Assistant in a future update: You can buy two for $349, which is the same price as one of Apple’s HomePod Siri-enabled speakers. This is likely not a coincidence.”
