Blitzscaling isn’t simply a matter of rapid growth. Every company is obsessed with growth. In any industry, you live and die by the numbers—user acquisition, margins, growth rate, and so on. Yet growth alone is not blitzscaling. Rather, blitzscaling is prioritizing speed over efficiency in the face of uncertainty . We can better understand blitzscaling by comparing it to other forms of rapid growth.

Was this dumb luck on Twitter’s side? Perhaps. Luck always plays a larger role than founders, investors, and the media would like to admit. But a major difference was that Twitter could draw on numerous networks for advice and help that Tumblr could not. For example, Twitter was able to bring in Dick Costolo, a savvy executive with prior scaling experience at Google. In contrast, even though Tumblr was arguably the most prominent start-up in its New York City ecosystem, it couldn’t easily draw upon a pool of local talent who had experience dealing with rapid growth. According to Greylock’s John Lilly, for every executive role that Tumblr needed to fill, there were less than a handful of candidates in all of New York City. This paucity of talent made hiring difficult; the company was reluctant to replace existing employees due to a lack of better alternatives. Without the ability to hire an executive team that could blitzscale, Tumblr decided to sell the company.