This chapter explores the answers to the ontological question, “What exists?” through four distinct philosophical perspectives. The first perspective, proposed by Carnap and neo-Carnapian thinkers, considers the question nonsensical, arguing that it holds no meaning outside specific linguistic frameworks, within which it can be resolved using the framework’s internal rules. The standard view, championed by philosophers like Quine, asserts that “Everything Exists.” This view holds that existence is universal, expressed through the particular quantifier. The chapter explores some challenges affecting this view and concerning negative existential statements that require some paraphrasing. A third perspective, which argues that nothing exists, is briefly discussed and dismissed. The final perspective, “Something exists, something else does not,” is associated with Meinongianism. This approach acknowledges non-existent objects defined by their properties and raises issues such as logical contradictions and counterintuitive implications. The chapter also examines contemporary developments, including modal Meinongianism, which introduces the concept of impossible world and changes the underlying logic.