The Adbusters Media Foundation is a Canadian-based not-for-profit, pro-environment organization founded in 1989 by Kalle Lasn and Bill Schmalz in Vancouver, British Columbia. Adbusters describes itself as "a global network of artists, activists, writers, pranksters, students, educators and entrepreneurs who want to advance the new social activist movement of the information age."

As anti-capitalist or opposed to capitalism, it publishes the reader-supported, advertising-free Adbusters, an activist magazine devoted to challenging consumerism. The magazine has an international circulation peaking at 120,000 in the late 2000s with circulation of 60,000 in 2022. Past and present contributors to the magazine include Jonathan Barnbrook, Morris Berman, Brendan Connell, Simon Critchley, David Graeber, Michael Hardt, Chris Hedges, Bill McKibben, Jim Munroe, David Orrell, Douglas Rushkoff, Matt Taibbi, Slavoj Žižek, and others.

Adbusters has launched numerous international campaigns, including Buy Nothing Day, TV Turnoff Week and Occupy Wall Street, and is known for their "subvertisements" that spoof popular advertisements. In English, Adbusters has bi-monthly American, Canadian, Australian, UK and International editions of each issue. Adbusters's sister organizations include Résistance à l'Aggression Publicitaire and Casseurs de Pub in France, Adbusters Norge in Norway, Adbusters Sverige in Sweden and Culture Jammers in Japan.