In the United States, women of color experience worse pregnancy and birth outcomes than white women. Likewise, many women of color report facing discrimination from perinatal health providers, and many experience precarity that can negatively impact birth experiences and outcomes. In this context, more women of color now embrace the use of community-based doulas. Using ethnographic data, I argue that community-based doulas, as members of the communities in which they offer their services, are uniquely able to negotiate the tensions between their clients and biomedical birth practitioners to engender acts of transformative agency and forward the cause of reproductive justice.