David Sacks is an American venture capitalist, entrepreneur, and technology executive. He co-founded Craft Ventures, a venture capital firm focused on early-stage startups, and was the founding COO of PayPal, helping guide its growth and eventual acquisition by eBay. Sacks has held leadership roles at several tech companies, including serving as CEO of Yammer, which was acquired by Microsoft. He is also known for his investments in prominent Silicon Valley startups.