This study investigates, from a multidisciplinary perspective, how Indigenous activism unfolds within digital culture through posts shared on Instagram. Its aim is to understand which discursive strategies are employed to occupy the platform and engage in political action beyond traditional institutional structures such as political parties and formal spaces of deliberation, operating instead within the logic of a communicational and socio-technical ecosystem. The empirical material analyzed focuses on two public Instagram profiles belonging to Brazilian activists Txai Suruí and Alice Pataxó, selected for their prominence as public figures and international engagement. The methodological approach draws on the adaptation of theoretical and conceptual frameworks from Discourse Analysis (DA), underpinned by debates in communication theory, anthropology, and political thought. The study seeks to enrich the empirical analysis with contextual elements that allow for a broader understanding of the object. It thus proposes to examine how the activists’ discourse emerges in digital culture as an informative synthesis of Indigenous and non-Indigenous symbols and meanings. We assume that, in the process of adapting their activist discourse to digital environments, these actors advocate for the environmental causes of their peoples, translating their messages for online audiences, articulating political action, co-creating meaning, and establishing socio-technical mediations..