https://www.cnbc.com/2018/02/28/spotify-is-relying-googles-cloud-according-to-ipo-filing.html

Spotify, which is already heavily reliant on Google's public cloud infrastructure, said on Wednesday that it plans to go deeper, eventually moving remaining computing and storage workloads in its data centers over to Google.

The disclosure, made in Spotify's filing for a public share sale, marks another boon for the Google Cloud Platform, which competes with Amazon Web Services as well as Microsoft, IBM and Oracle. Last month Apple provided confirmation that it uses Google's cloud to store data for iCloud services.