There are several types of investors that startups can approach, each with different expectations and resources. Angel investors are individuals who provide early-stage funding, often in exchange for equity. They are typically more flexible and willing to take risks on new ideas. Venture capitalists (VCs) are professional groups that manage pooled funds from multiple sources to invest in high-growth startups. VCs often look for more established businesses with proven traction. Corporate investors are large companies that invest in startups for strategic benefits such as access to new technologies or markets. Lastly, crowdfunding platforms allow startups to raise small amounts of money from a large number of people, leveraging the power of the crowd to fund their ventures.