Seed-stage funding to startups has exploded in the past decade and become an asset class of its own. If that wasn’t obvious already, consider that in just the past few months, three of Silicon Valley’s largest and best-known venture firms—Andreessen Horowitz, Greylock and Khosla Ventures—all announced large new dedicated seed funds.

To visualize this dramatic change in the venture ecosystem and understand how much seed investment grew in the past 10 years, we decided to look at the number of U.S. startups that were funded over various five-year time frames and at different stages. READ MORE