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. Figures include shares sold by stockholders and exclude bankers' option to sell more shares.
IPO stock price: Google, $85; Facebook $38.
Market valuation at debut: Google, $24.6 billion; Facebook, $104 billion.
Date of stock market debut: Google, Aug. 19, 2004; Facebook, May 18, 2012 (expected).
Percent gain of stock on first day of trading: Google, 18 percent; Facebook, to be determined.
Current market value: Google, $203 billion; Facebook, $104 billion.
For the latest tech news and reviews, follow Gadgets 360 on X, Facebook, WhatsApp, Threads and Google News. For the latest videos on gadgets and tech, subscribe to our YouTube channel. If you want to know everything about top influencers, follow our in-house Who'sThat360 on Instagram and YouTube.