A startup company with a promising technology but limited operating history and no substantial assets is seeking funding to fuel its growth and development. Traditional bank loans are not feasible due to the company's lack of collateral and financial track record. The startup's founders are looking for investors who specialize in providing equity financing to early-stage companies with high growth potential, often in exchange for an ownership stake. Which alternative financing method would be the most appropriate for this startup, considering its financial situation and growth stage?