Facebook has topped the Silicon Alley Insider 50 Most Valuable Internet Startups list, with a valuation of $6.5 billion.

Other ‘startups’ in the SAI 50 Most Valuable Internet Startups list are Wikipedia, valued at $5 billion, Betfair, the online gambling site valued at $4.5 billion, NewEgg, the e-commerce site, valued at $3.2 billion, and Craigslist, valued at $3 billion.

Here is Silicon Alley Insider’s list of the Top Ten Most Valuable Internet Startups:

1. Facebook ($6.5 billion)
2. Wikipedia ($5 billion)
3. Betfair ($4.5 billion)
4. NewEgg ($3.2 billion)
5. Craigslist ($3 billion)
6. Mozilla ($2.7 billion)
7. Yandex ($2.6 billion)
8. Webkinz (aka Ganz) ($1.4 billion)
9. GoDaddy ($1.4 billion)
10. Demand Media ($1.3 billion)

Source: Silicon Alley Insider, “The SAI 50+: World’s Most Valuable Internet Startups,” Silicon Alley Insider, October 28, 2009

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