Which Reddit co-founder later co-founded the travel search company Hipmunk?

Reddit co-founder Steve Huffman later co-founded the travel search company Hipmunk.

Huffman and Alexis Ohanian launched Reddit in June 2005 after developing the idea through Y Combinator. Huffman served as the principal programmer during Reddit's early period and helped establish the site's basic technology and culture. He left Reddit in 2009, after the company had been acquired by Condé Nast.

In 2010, Huffman co-founded Hipmunk with Adam Goldstein. Hipmunk was an airfare and travel search service designed to make comparing flights easier by presenting results in a visual timeline rather than a dense list. The startup was also backed by Y Combinator, connecting Huffman's second major venture to Reddit's original incubator.

The main source of confusion is Reddit's wider founding story. Alexis Ohanian was Huffman's original co-founder, while Aaron Swartz joined after Reddit merged with his company Infogami. Christopher Slowe became an important early engineer, but he did not co-found Hipmunk.