This document discusses 7 reasons to choose an outsourced agency to help build a startup. It argues that agencies can provide needed technical talent from the beginning, introduce best practices, and help plug skills gaps. Agencies also provide access to networks, accelerate time to market, offer lower initial costs to bootstrap, and provide experience from prior projects. When choosing an agency, the document advises considering communication, team size of 100-250 people led by founders, alignment of motivation, use of processes, and confidence the agency can handle any situation.