Rackspace, the biggest competitor to Amazon, runs a fleet of Web-based data centers, allowing customers to store their websites and applications on its servers. It competes in the public-cloud market with Amazon Web Services business, where customers rent computing power along with related services. Rackspace’s revenue went up 86 percent to $58.5 million in that area of business, whereas its sales in the traditional dedicated server business went up 23 percent to $224.8 million.

 

In extended trading, Rackspace stock went up to $52.66. In the past three years, the stock, that had made its debut in 2008, has soared ten times in value. Its customer base increased 6.9 percent from the previous quarter to 172.510 and its installed base rose 1.2 percent per month in the period, compared to a growth of 0.6 percent a year earlier and 0.9 percent in the third quarter.