Anticapitalistas is defined as a revolutionary socialism, anti-capitalist, proletarian internationalist, republican, and eco-socialist organisation, assuming Marxism in an open, plural, and critical sense.

However, EA progressively lost weight as an internal current of IU, mainly due to the rupture with the ecosocialist sectors that originally participated in its foundation.

Some prominent leaders of IU linked to EA abandoned the current in the early 2000s, for example, Julio Setién, Oskar Matute or Concha Denche.

The 2013 edition was attended by Juan Carlos Monedero, Pablo Iglesias Turrión, Martiño Noriega, Sabino Cuadra, Esther Vivas and Jaime Pastor.

The 2015 edition was attended by the Anticapitalistas European MPs Miguel Urbán and Lola Sánchez Caldentey, Katerina Sergidou, Pedro Santisteve (mayor of Zaragoza), José María González Santos Kichi (mayor of Cádiz), Albano Dante Fachín (leader of Podemos in Catalonia), Jaime Pastor, Beatriz Gimeno, Teresa Rodríguez, Teresa Forcades, Antón Sánchez and Rommy Arce (member of the Municipal Council of Madrid, of Anticapitalistas and Ahora Madrid).