Amazon Web Services rules the roost in public cloud, but Microsoft has shown a dogged determination to match its frequent price cuts while also continually upgrading its technical capabilities.
And then there's Google, which is believed to run well in excess of 1 million servers, has numerous rock star engineers, and is widely considered to possess more knowledge about massively scalable computing than any other company on the planet.
But who's providing the brain power behind these clouds? Some of the names are well-known, while others are less-high-profile types. CRN looks at the big names driving cloud success at three of the biggest players in the cloud market.