Alliance Defending Freedom (ADF) is a non-profit legal organization based in the United States that focuses on advocating for religious freedom, free speech, and parental rights. Founded in 1994, ADF provides legal support and resources to individuals and organizations facing legal challenges related to these issues. ADF engages in litigation, public policy advocacy, and education to promote its mission. The organization often represents clients in cases involving First Amendment rights and has been involved in high-profile legal battles, including those related to same-sex marriage and abortion.