Private investors are non-public sources of capital that invest in private companies. They include angel investors, venture capital firms, family offices, corporate venture arms, and high-net-worth individuals, most of whom must qualify as "accredited investors" under SEC rules to participate in startup financings. They are distinct from public market investors (who buy publicly traded stocks) and from institutional debt providers (banks, lenders).
The four main categories of private investors at the startup stage are angel investors (individuals investing personal capital, typically $10,000 to $250,000 per deal), venture capital firms (institutional funds investing pooled limited-partner capital, typically $250,000 to $25...