Gabe Logan Newell (/ˈnju:əl/; born November 3, 1962), often nicknamed Gaben (/ˈɡeɪbˈɛn/), is an American computer programmer and businessman best known as the co-founder of the video game development and digital distribution company Valve Corporation. Born in Seattle, Newell attended Harvard University in the early 1980s, but dropped out shortly before graduating and soon went to work for the American technology company Microsoft, where he spent the next decade working as a producer for some of their early Windows operating systems.

During his time at Microsoft, Newell, along with fellow co-worker Mike Harrington, were impressed by computer games that were being released in the mid-1990s, such as id Software's Doom and Quake. Fully convinced that video games were the future of entertainment, and intrigued by the prospect of having his own game development studio, Newell, along with Harrington, left Microsoft to co-found Valve in 1996, where he remains its president.