Emmett Shear is an American Internet entrepreneur and investor. He is the co-founder of live video platform Justin.tv. He served as the chief executive officer of Twitch when it was spun off from Justin.tv until March 2023. In 2011, Shear was appointed as a part-time partner at venture capital firm Y Combinator. In November 2023, he briefly served as interim CEO of OpenAI.

OpenAI is an American artificial intelligence (AI) research organization founded in December 2015, researching artificial intelligence with the goal of developing "safe and beneficial" artificial general intelligence, which it defines as "highly autonomous systems that outperform humans at most economically valuable work". As one of the leading organizations of the AI boom, it has developed several large language models, advanced image generation models, and previously, released open-source models. Its release of ChatGPT has been credited with starting the AI boom.