Linus Gabriel Sebastian (born August 20, 1986) is a Canadian YouTuber, best known for creating and hosting YouTube technology-focused channels. On November 24, 2008, he uploaded the first video to his flagship channel, Linus Tech Tips (LTT). By December 1, 2024 LTT has amassed 16 million subscribers and more than 8.27 billion views. Across all his channels, Sebastian has over 32 million subscribers and more than 11.04 billion views.
Before launching his own media company in October 2012, Sebastian served as the principal on-camera presenter for the now-defunct Canadian computer retailer NCIX. In late 2012, he founded Linus Media Group (LMG), formally launching it in 2013. He led LMG as its CEO until July 1, 2023 when he transitioned to the role of chief vision officer to focus on the company's long-term strategy and creative directions.