Understanding the nature of Dark Matter is one of the most significant open problems in particle physics and cosmology. In this talk, I will explore how Dark Matter candidates can naturally arise as composite bound states in new strongly coupled gauge sectors. I will focus on two specific realizations.
First, I will discuss baryonic Dark Matter in the context of a model for neutrino mass generation. Then, I will examine a model of dark pions, demonstrating how the inclusion of a topological theta term can induce resonant processes, which allow to reproduce the correct Dark Matter relic abundance and address the small-scale anomalies of the Lambda-CDM model.