This study documents a new value-added role of venture capitalists and addresses important questions about how resources are combined to create firms. As part of the nexus of contracts surrounding a firm, strategic alliances can be viewed as relational contracts that blur firm boundaries. This paper provides evidence that alliances are more frequent among companies sharing a common venture capitalist. The effect is concentrated in alliances in which contracting problems are more pronounced, consistent with venture capitalists utilizing informational and other advantages in providing resources to firms. Further, these alliances improve the probability of exit for venture-backed firms.