Abdurrazack "Zackie" Achmat is a South African activist and film director. He is a co-founder the Treatment Action Campaign and known worldwide for his activism on behalf of people living with HIV and AIDS in South Africa. He currently serves as board member and co-director of Ndifuna Ukwazi, an organisation which aims to build and support social justice organisations and leaders, and is the chairperson of Equal Education.

The Treatment Action Campaign (TAC) is a South African HIV/AIDS activist organisation which was co-founded by the HIV-positive activist Zackie Achmat in 1998. TAC is rooted in the experiences, direct action tactics and anti-apartheid background of its founder. TAC has been credited with forcing the reluctant government of former South African President Thabo Mbeki to begin making antiretroviral drugs available to South Africans.