Do you have a team that sources all your data for you or does it come from CrunchBase? (is that the CB?)
In terms of where it comes from: 80% of our data comes via software we've built to parse news, SEC, investor, corporate websites (we crawl about 12k of them daily).
About 20% of our data comes directly from investors. The biggest contingent is angel data which we get via a partnership we have with Silicon Valley Bank and the Angel Capital Association.