Alternative libertaire (AL, "Libertarian Alternative") was a French anarchist organization formed in 1991 which publishes a monthly magazine, actively participates in a variety of social movements, and is a participant in the Anarkismo.net project.

In 2019 the organization merged into the Union Communiste Libertaire (UCL, "Libertarian Communist Union") Alternative Libertaire, now UCL, identifies with various tendencies within the libertarian socialist current of anarchism including anarcho-communism and anarcho-syndicalism.

This was in opposition to the Marxists, whom Mikhail Bakunin regarded as authoritarian.

[1] Alternative Libertaire's practical and ideological background has been summed up by the organisation as continuing from the following groups: Today Alternative Libertaire is developing its political action on two fronts:[3] AL militants are particularly involved in struggles in the workplace and in the unions, in the CGT or in SUD (sometimes in the CNT), in the fight against unemployment, for the right to housing, in the environmental movement and in the fight against patriarchy.

Alternative Libertaire endeavours to link these conflicts in today’s society with the perspective of a break with capitalism and the state.