Bennett C. Greenspan (born 1952) is an American businessman. His business ventures have covered industries from real estate to the .com boom. Though he has mainly worked in the fields of photography and genetic testing, he is best known for his pioneering work in genetic genealogy. Greenspan founded Family Tree DNA which was the first American company to offer genealogical DNA testing directly to the general public. He is currently the president and chief executive officer (CEO) and also the managing partner of Family Tree DNA's parent company Gene by Gene.