Background Respectful maternity care (RMC) has been elevated in the global discourse, however, instances of disrespect and abuse remain prevalent. While several studies have highlighted promising approaches to promote RMC, this body of literature is still limited and few approaches have been scaled outside the initial study sites. Building on formative research conducted through a behavioral science lens, we sought to develop and test evidence-based, low-cost solutions to promote RMC which would be well-positioned for scale-up. Our study highlights the effectiveness of the solution package on provider provision of respectful care and client satisfaction, as well as intermediary outcomes and behavioral mechanisms. Methods A quasi-experimental evaluation, informed by the behavioral design approach, was completed to test the effectiveness of a 5-component solution package in Chipata, Zambia. Quantitative surveys were collected from health facility providers and postpartum clients at baseline and endline in intervention and comparison facilities. Additional qualitative interviews were conducted with health facility providers and postpartum clients at endline. We also conducted interviews with health facility in-charges and observed labor and delivery practices at intervention facilities over the course of implementation. Results Evidence suggested that at endline, clients at implementation facilities were less likely to experience disrespect and abuse compared to clients at comparison facilities (ss = - 0.15 p = 0.01). Clients at intervention facilities were more likely to request pain management compared to clients at comparison facilities (ss = 0.33, p = 0.003). The solutions were simple for providers to implement and were easily integrated into existing services by providers during labor and delivery. Providers at intervention facilities also described the pain management toolkit as helpful in expanding the types of pain management techniques used during labor. Conclusions The results of this small-scale study act as a proof of concept, demonstrating that the behavioral design approach can lead to solutions that show potential for impact. In other settings where providers face similar barriers to providing RMC, an adaptation of this solution package might lead to similarly positive results. Given the global scale of disrespectful care, these low-cost solutions hold promise for improving the quality of care women receive during labor and delivery. Plain Language Summary Instances of disrespect and abuse during childbirth are prevalent around the world, particularly in low-resource settings. Few interventions have been designed and evaluated in these settings and even fewer in Southern Africa. This study aimed to understand the effects of a behaviorally informed intervention on the provision of respectful maternity care. We performed an evaluation of a health facility-based intervention, in Chipata District, Zambia. The study included quantitative and qualitative surveys with health care providers and women who recently delivered, as well as health facility observations and qualitative interviews with health facility supervisors. Our results show that clients who delivered at a facility where our intervention took place had a decreased likelihood of experiencing disrespect and abuse and an increased provision of pain management support. Our findings suggest that facility-based approaches informed by behavioral science have the potential to increase provision of respectful care and decrease the prevalence of mistreatment in low-resource settings. A large-scale evaluation of these interventions across settings could contribute valuable evidence around low-cost solutions to promote respectful maternity care.