eHarmony.com, Inc. is a privately-held, venture capital backed online dating service. The dating site operates primarily in the United States and other English speaking countries, but has developed a presence in other countries as well. To join, individuals must pay a fee that is priced according to the length of their subscription. Users are then required to answer a questionnaire comprised of over 200 questions. eHarmony utilizes the questionnaire in its proprietary matching system to connect members. eHarmony was founded in 2000 by Dr. Neil Clark Warren. eHarmony headquarters are located in Pasadena, California.