Microsoft has edged ahead of Amazon to become the largest Windows hosting company, according to news from internet research firm Netcraft.
The company now has 23,400 web-facing Windows computers against Amazon's 22,600.
This growth is predominantly due to Windows Azure, which now accounts for close to 90% of all web-facing computers at the company.
The company’s public cloud solution has grown by almost 50% since May 2013.
In the February 2014 Web Server survey Netcraft found 27,000 web-facing computers (both Windows and Linux) using the cloud computing platform.
Many of Microsoft's own services are powered by Windows Azure including Office 365, Xbox Live, Skype and OneDrive.
A number of well-known brands and organisations are already using Windows Azure.
This includes Sochi 2014 Olympic Games, luxury sports car manufacturer Aston Martin, Taiwanese electronics brand BenQ and McDonald's Happy Studio.