Silicon Valley is home to many of the fastest growing and most well known startups in the world. In this fireside, Reid Hoffman from Greylock Partners and Sam Altman from Y Combinator share their perspectives on how Silicon Valley companies effectively blitzscale, how to think about hiring when a startup is growing quickly, and why culture is so connected to the success of a company. This fireside was recorded at The Scaleup Offsite, an event focused on scaling companies co-hosted by Greylock Partners and YC Continuity.