Google versus Facebook: Here's how the two rivals stack up

Facebook is the hottest Internet company to hit the stock market since Google went public in 2004. The Silicon Valley companies, located seven miles apart, also happen to be locked in a bitter battle for Web surfers' allegiance and online advertisers' money. The duel is likely to intensify now that the IPO has provided Facebook Inc's social network with the means to pay for efforts to battle Google Inc's dominant search engine. Here's the two rivals stack up, based on the latest available data: 

ANNUAL REVENUE: 

Google - $38 billion 

Facebook - $3.7 billion 

ADVERTISING REVENUE: 

Google - $36.5 billion 

Facebook - $3.2 billion 

ANNUAL NET INCOME: 

Google - $9.7 billion 

Facebook - $668 million. 

SOCIAL NETWORKING USERS: 

Facebook - more than 900 million 

Google - more than 170 million 

EMPLOYEES (as of March 31): 

Google - 33,100 

Facebook - 3,500 

CEO: 

Google - Co-founder Larry Page 

Facebook - Co-founder Mark Zuckerberg 

AMOUNT RAISED IN IPO: 

Google - $1.67 billion 

Facebook - $16 billion