Policy makers have long seen parents and families as key levers for improving U.S. student outcomes and success, and new cross-sector collaborative policy and initiatives provide a promising context for innovations in efforts to engage nondominant families in educational equity reform. Drawing on a lens of equitable collaboration, this study examined the strategies in three organizational efforts to improve family engagement in education within a common cross-sector collaboration initiative in a Western region of the United States. Although conventional approaches persisted amid regular exchanges across organizations, we identified more reciprocal, collective, and relational strategies: (a) parent capacity-building, (b) relationship-building, and (c) systemic capacity-building efforts. Despite promising strategies, the dynamics of implementation in the cross-sector collaborative constrained change and mirrored limitations in family engagement practice and policy. The article concludes with next steps for research, practice, and policy in the journey toward more equitable collaboration.