The Google Home already supports a large number of music streaming services - including YouTube Music, TuneIn, Google Play Music, iHeartRadio, Pandora, and NPR One. Today at Google I/O, Google announced more services will be compatible - including free Spotify accounts.
The most exciting part is that Spotify streaming will not require a premium account to work with the Google Home, which is currently required for streaming on Alexa (and was previously required on the Home). Deezer is only a paid subscription, but Google did not clarify if a paid SoundCloud account is required for streaming.
We will update this post when we receive additional details.