Grumpy Old Geeks People Rob Rhinehart Person Rob Rhinehart 2 mentions in 1 episode Rhinehart is identified by a speaker as the person behind Soylent and a Y Combinator alumnus. Mentions 21: Ye Good Old Days with Scott Beale Aug 19, 2013 1:26:08 Rob Reinhart, who's the guy 1:26:26 He's a Y Combinator alum.