Matt Dillahunty is an atheist activist. He was the president of the Atheist Community of Austin from 2006 to 2013. He has hosted the Austin-based webcast and cable-access television show The Atheist Experience since c. 2005, and formerly hosted the live Internet radio show Non-Prophets Radio. He is also the founder and contributor of the counter-apologetics encyclopedia Iron Chariots and its subsidiary sites.
He is regularly engaged in formal debates and travels the United States speaking to local secular organizations, churches and university groups on religion, philosophy, skepticism, atheism, humanism and magic.
Alongside fellow activists Seth Andrews and Aron Ra, he traveled to Australia in March 2015 as a member of the Unholy Trinity Tour. In April 2015 he was an invited speaker at the Merseyside Skeptics Society QEDCon in the United Kingdom. Beginning in the summer of 2017, Dillahunty joined a speaking tour sponsored by the Pangburn Philosophy Foundation where he shares the stage with fellow atheists Sam Harris and Richard Dawkins.