It began as a foundation on 24 September 2010 with the goal of becoming "the seed and source of debate about political ecology and social equity, originating a sociopolitical movement".

[9] The party was fifth in Madrid,[10] achieving representation thanks to the Valencian coalition Compromís-Q, in which Equo participated.

This resulted in seats for three Equo candidates: Juantxo López de Uralde, Rosa Martínez and Jorge Luis Bail.

[12] In the runup to the November 2019 Spanish general election, Equo withdrew from Unidas Podemos and agreed an electoral fusion with Más País.

Disagreeing with this decision and willing to stay with Unidas Podemos, Equo founder Juanxto López de Uralde left the party and founded Green Alliance.