Other than the founder or the founding team?<p>Or, put another way, is it possible to build a sizeable business using contractors and external providers only?<p>For arguments sake, 'sizeable' and 'substantial' equate to $10m+ pa in revenue and the business must make and sell something i.e. it's not a holding company, licensor, trader etc.
BuiltWith.com is pretty much just one guy doing over $10m per year. At the notch below there are others like Pieter Levels who I think is doing over $1m per year with Nomad List and RemoteOK and I think it's mostly just him with some part time help. Probably a few more that no one has heard of.