Ben Horowitz is an American businessman, investor, blogger, and author. He is a technology entrepreneur and co-founder along with Marc Andreessen of the venture capital firm Andreessen Horowitz. He previously co-founded and served as president and chief executive officer of the enterprise software company Opsware, which Hewlett-Packard acquired in 2007. Horowitz is the author of The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers, a book about startups.