Sam Altman is an entrepreneur, investor, and the CEO of OpenAI, an artificial intelligence research company. He was previously the president of Y Combinator, a startup accelerator that has funded and supported many successful companies such as Airbnb, Dropbox, and Reddit.Altman started his career as a co-founder and CEO of Loopt, a location-based social networking app that was acquired by Green Dot Corporation in 2012. He then became a prolific angel investor, investing in companies such as Airbnb, Stripe, and Reddit.