As Apple and Amazon compete for a greater share of consumer dollars and attention, they also have a particularly intimate business relationship: Apple is spending more than $30 million a month on Amazon’s cloud, according to people familiar with the arrangement.

Apple’s cloud expenditure reflects the company’s determination to deliver online services like iCloud quickly and reliably, even if it must depend on a rival to do so.

Källa: Apple spends more than $30 million on Amazon’s cloud every month, making it one of the biggest AWS customers