Apple periodically publishes a new version of PDF called iOS Security Guide. In its latest version of this PDF, published last month, Apple confirms that iCloud actually lives on Google Cloud Servers.
For years the iOS Security Guide contained language indicating that iCloud services were relying on remote data storage systems from Amazon Web Services and Microsoft’s Azure. But in the recent version, Amazon Web Services and Microsoft’s Azure is replaced by Amazon S3 and Google Cloud.
Apple describes it as “The encrypted chunks of the file are stored, without any user-identifying information, using third-party storage services, such as [Amazon] S3 and Google Cloud Platform.”
Apple isn’t Google’s only big-name cloud customer. Spotify, Snap, and PayPal also rely on Google’s cloud services. Both Google and Apple didn’t respond to comment.