Data from an international sample of 392 men who had attended gender-based violence (GBV) prevention events were used to examine motivations for involvement in GBV prevention work. Participants responded to an online survey (available in English, French, and Spanish). The most commonly reported reasons for involvement included concern for related social justice issues (87 percent), exposure to the issue of violence through work (70 percent), hearing a moving story about domestic or sexual violence (59 percent), and disclosure of abuse from someone close to the participant (55 percent). Using a latent class analysis, we identified four profiles of men’s motivations: low personal connection (22 percent), empathetic connection (26 percent), violence exposed connection (23 percent), and high personal and empathetic connection (29 percent). Participants classified into these profiles did not differ in length of movement involvement but some differences on key ally variables and by global region did emerge. Implications for engagement strategies and future research are discussed.