KEY POINTS
  • Amazon Web Services gave Amazon $5.11 billion in revenue, above analysts' estimates.
  • While AWS leads the cloud market, Microsoft Azure's 98 percent revenue growth rate exceeded Amazon's 44.6 percent growth rate.
Amazon Web Services CEO Andy Jassy speaks at the 2017 AWS re:Invent conference in Las Vegas.

Amazon's cloud business generated more revenue than analysts expected in the fourth quarter, with sales surging 45 percent.

The financial results strengthen the case that Amazon Web Services has grown into a cash machine for its parent company, while Alibaba, Google, IBM, Microsoft and Oracle all try to catch up.