Mehta is a regular speaker at atheist events, and he has been a board member of charitable organizations such as the Secular Student Alliance and the Foundation Beyond Belief.

Seeking to learn more about what motivated many Americans to be religious, he decided to attend and take notes at a number of churches across the United States.

[15] Mehta is a regular speaker at freethought and skeptical events around the U.S.[16] He attempts to build bridges of understanding between believers and non-believers through his blog, The Friendly Atheist.

"[25] In June 2013, Mehta wrote for the "Room for Debate" series in the New York Times, where he argued that "There’s a very real downside to praying.

"[24] In July 2013, he held an open discussion at the Oak Hills Church in San Antonio, Texas, where he explained his frustration at being confronted time and again with the same arguments for believing in God.

[9][30][31] In January 2006, Mehta posted an auction on eBay where he explained his background in atheism and offered to go to the worship services of the winning bidder's choosing.

Mehta later donated that money to the Secular Student Alliance, a non-profit organization for which he served as chair of the board of directors.

[33] Nearly a month after the auction, an article about Mehta's experiences appeared on the front page of The Wall Street Journal,.

Mehta eventually wrote about his visits at nine different churches as well as two additional pieces dealing with atheist conventions and Christian media.

[36] In August 2014, Mehta announced his latest project, God is an Abusive Boyfriend (and you should break up), based on his YouTube series, The Atheist Voice.