Premise: Hipmunk, stylized as hipmunk, is a consumer-oriented online travel company headquartered in San Francisco, California. It was co-founded by Adam Goldstein and Reddit co-founder Steve Huffman in 2010. The company focuses on the visual organization of flight search results. It received increased media attention when Google announced its flight search service in September 2011.
Hypothesis: Google announced its flight service because of Hipmunk.