The ubiquity of social media platforms fuels heated discussions about algorithms and selection biases leading people into online “echo chambers” – spaces characterized by the homogeneity of voices and information in which conspiracy theories thrive. Scholars argue that these enclosed spaces deepen societal polarization and motivate political extremism. In this talk, I will share some insights about four distinct conspiracy domains including politics, mysteries of the universe, culture industry and science and show that different conspiracy communities showcase varying degrees of “echo chamberness”.