San Francisco often says it is part of Silicon Valley.  There is indeed a small cluster of startups in SF. But how much? Here’s a chart. The circles represent the amount of valuation for these companies, measured in billions of dollars.

Valuation in Silicon Valley

Valuation in Silicon Valley (click for a larger image)

One Silicon Valley company alone, such as Cisco or Facebook, has a greater valuation than ALL startups in San Francisco.

It’s nice that there are startups in SF. There are startups in Oakland, Austin, and many other cities. But Silicon Valley is still in Silicon Valley.