The traditional employment relationship (TER) is eroding rapidly due to economic instabilities and crises occasioned by past and recent events (e.g. COVID-19). In response is a growing proliferation of non-traditional employment relationships (NTERs). Expectedly, traditional workers’ voice research has been widely documented. However, non-traditional workers’ voice research is in its infancy leaving the literature fragmented. This necessitates understanding the body of literature and conceptualizing voice in NTERs. Reviewing present empirical studies on non-traditional workers’ voice, we conceptually map the current forms of voice available to these workers, the issues they voice and their influence on management actions and decisions. Then we identify the determinants and outcomes of non-traditional workers’ voice, and offering future research insights in to studying voice of these workers.