Top 50 rank: 7
The economic recovery may be weak, but Amazon.com, the world's largest online retailer, is thriving.
The company's Kindle e-reader is a runaway hit, confounding critics who said it would be crushed by the iPad. Amazon's customer service is top rated in consumer surveys. And the company has been expanding, with the acquisition of niche sites like Woot, which targets gadget geeks.
NEXT: Netflix
Last updated March 08 2011: 6:02 AM ET