Sonos is spying on me (and you)
Shameless plug: I'm building an alternative to Sonos focused on managing audio streams on your home network. It's a software and a controller webapp to broadcast synchronized audio on any number of Windows / MacOS / Linux / Chromecast / Airplay speakers / Web pages / Philips Hue (light synchronized to the audio). It's available on https://soundsync.app/ and the sources are on Github: https://github.com/geekuillaume/soundsync