In recent years, young people have acquired a more active role in different areas of public life, such as culture, politics and gender debates. However, the relevance of their role in innovation processes has remained largely undiscussed. Are young people, in particular those from working class backgrounds, a forgotten actor for innovation and technological change policies? This study aims to understand whether the youth population—who are widely connected to the Internet, who do not necessarily participate in formal educational spaces but are increasingly acquiring digital skills autonomously—can be considered as an agent of innovation. Specifically, this study aims to propose and define the concept of Digital Grassroots Youth Innovation. It is based on both empirical and theoretical sources. On the one hand, it relies on a compilation of experiences of innovative activities related to digital technologies led by young people in Argentina. On the other hand, it is supported by a theoretical discussion on (a) the different types of innovations and their subjects, (b) the specificities of the ‘marginal mass’ in informational capitalism and (c) the characterisation of the young population in Argentina as ‘NEET’ (not in education, employment or training). Finally, we ask about the role played by digital technologies and non-formal learning in these particular innovation processes.