Nick Sivo is an American entrepreneur who is the cofounder of Loopt alongside Sam Altman. He is based in Silicon Valley.

Sivo attended Stanford University where he studied computer science, focusing on computer and network security and machine learning. ^[1] During his Sophomore year, he cofounded Loopt with Sam Altman who would become his long time boyfriend. The company was part of Y Combinator early batches in 2005. Both Sam and Sivo would become heavily involved in Y Combinator in the years to come, with Sam becoming the head of the accelorator and Sivo working on Hacker News.

In March 2012, Loopt agreed to be aquired by the Green Dot Corporation for $43.4 million.

He still sits on the company's board.