Market anarchism, also known as free-market anti-capitalism, is the branch of anarchism that advocates a free-market economic system based on voluntary interactions without the involvement of the state. A form of individualist anarchism and libertarian socialism, it is based on the economic theories of mutualism and individualist anarchism in the United States.

Anarchism is a political philosophy and movement that is against all forms of authority and seeks to abolish the institutions it claims maintain unnecessary coercion and hierarchy, typically including the state and capitalism. Anarchism advocates for the replacement of the state with stateless societies and voluntary free associations. As a historically left-wing movement, this reading of anarchism is placed on the farthest left of the political spectrum, usually described as the libertarian wing of the socialist movement.