Marc Andreessen, born on July 9, 1971, is an American entrepreneur, investor, and software engineer widely recognized for his significant contributions to the development of the Internet. He co-authored Mosaic, the first widely used web browser with a graphical user interface, which played a pivotal role in popularizing the World Wide Web. Following Mosaic, Andreessen co-founded Netscape Communications, further commercializing web browsing and opening the Internet to millions. Netscape was later acquired by AOL for $4.2 billion.
Currently, Andreessen is a co-founder and general partner at Andreessen Horowitz (a16z), a prominent Silicon Valley venture capital firm. a16z invests in various technology sectors, including healthcare, consumer, cryptocurrency, gaming, fintech, education, and enterprise software. As of July 2025, a16z had $46 billion in assets under management, ranking it as the top venture capital firm. Andreessen also serves on the board of directors for several companies, including Meta. In recent news, Andreessen has been actively discussing the potential of AI, declaring it the biggest technological revolution of his lifetime and emphasizing the importance of generalists in the age of AI. He also praised OpenAI's Sora video model and its implications for robotics.
