Justin Kan is an American internet entrepreneur and investor. He is the co-founder of live video platforms Justin.tv and Twitch, as well as the mobile social video application Socialcam. He is also the cofounder and former CEO of law-tech company Atrium. In 2024, he announced the launch of Stash, an e-commerce and payment platform tailored for video game developers.

Justin.tv was a website created by Justin Kan, Emmett Shear, Michael Seibel, and Kyle Vogt in 2007 to allow anyone to broadcast video online. Justin.tv user accounts were called "channels", like those on YouTube, and users were encouraged to broadcast a wide variety of user-generated live video content, called "broadcasts".