KEY POINTS
  • Microsoft's Azure cloud is second only to Amazon Web Services in the market.
  • Microsoft doesn't release revenue figures for Azure, but it does disclose growth rates.
  • KeyBanc analysts now estimate that Azure will deliver $26.4 billion in revenue in the 2021 fiscal year, while the contribution from Windows will total $20.3 billion.
Microsoft CEO Satya Nadella in front of the Cortana logo

While Microsoft is arguably best known for being the company behind Windows, its cloud business could soon be a bigger deal in terms of revenue.

In a note distributed to clients on Thursday, KeyBanc Capital Markets analysts Brent Bracelin and Clarke Jeffries estimated that Microsoft's Azure public cloud will generate more revenue than Windows in the 2021 fiscal year.