Neil Clark Warren

Warren was chairman of the board of directors at eHarmony from its beginning. In 2007, he entered retirement to live in Kennebunkport, Maine with his wife Marylyn. Warren then returned to eHarmony as CEO in 2012. "I think we could have had a very good business forever matching people for marriage," Warren said in 2012 in an interview with the Los Angeles Times. "But our sense was, we could do a lot more than that."

Much of eHarmony's initial success was explained by Warren by its promotion on the daily radio broadcast of Focus on the Family. As the company expanded and sought broader market share, Warren parted ways with Focus on the Family and its founder, James Dobson. In 2005, Warren discontinued his appearances on Dobson's radio show and bought back rights to three of his books—Finding the Love of Your Life, Make Anger Your Ally, and Learning to Live with the Love of Your Life—originally published by Focus on the Family. As Warren explained, "We're trying to reach the whole world—people of all spiritual orientations, all political philosophies, all racial backgrounds."

Warren's religious views were a reason for eHarmony's lacking same-sex matches. In 2004, Warren explained his position by commenting: "cities like San Francisco, Chicago or New York ... they could shut [eHarmony] down so fast. We don't want to make enemies out of them. But at the same time, I take a real strong stand against same-sex marriage, anywhere that I can comment on it."

In 1995, Warren and his son-in-law, Greg Forgatch, created Neil Clark Warren & Associates, a company which offers seminars and teaching tools based on Warren’s books. In early 2000, they established eHarmony, an online compatibility matching service which gained two million users in its first three years. After retiring in 2007, Warren came out of retirement in July 2012, returning as the chief executive of eHarmony.

In 1995, Warren and his son-in-law Greg Forgatch established Neil Clark Warren & Associates, a company offering seminars and teaching tools based on Warren's book Finding the Love of Your Life (published in 1993). Building upon his writing on building strong marriages (including his book, Finding the Love of Your Life), Warren and Forgatch started eHarmony in 2000 as a web-based method of matching singles for marriage based on what are termed "29 dimensions of compatibility".

Warren has written about individuals finding the right marriage partner. He published his first pamphlet in 1975 entitled Selecting a Marriage Partner. By 2013, Warren had written ten books, including Learning to Live with the Love of Your Life, Love the Life you Live: 3 Secrets to Feeling Good—Deep Down in Your Soul, and Date or Soul Mate?: How to Know If Someone Is Worth Pursuing in Two Dates or Less.

Warren received his undergraduate degree at Pepperdine University in 1956. He got his master's in divinity at Princeton Theological Seminary in 1959. Warren received his Ph.D in clinical psychology from the University of Chicago in 1967.

Neil Clark Warren (born September 18, 1934) is an American clinical psychologist, Christian theologian, seminary professor and co-founder of the online relationship sites eHarmony and Compatible Partners.