This chapter focuses on promoting high-impact philanthropy for the Global South through learning from the experiences of Co-Impact, a global collaborative that advances inclusive systems change and gender equality through grant-making and influencing philanthropy through its network connections. It explains the constraints in philanthropic practice the Co-Impact model is designed to address and how to advance ‘trust-based philanthropy’ that both learns from and inspires others. The chapter argues why, under certain circumstances, pooling funding can achieve greater impact, and the importance and power of philanthropic networks to promote collaboration and impact. It provides a practical approach to addressing inherent power dynamics in philanthropy and discusses the spectrum between collaborative philanthropy and pooled funds. It also tells the story of Co-Impact’s growth and outlines its key learnings with respect to mobilising philanthropic resources. This experience reflects the belief that philanthropic capital can do more and better and that a crucial mechanism for achieving its potential is through active networks. It clarifies how the concept of networks goes beyond loose transactions and collections of people and organisations and instead embodies the idea of a community of interconnected and like-minded individuals and organisations that share similar values, working together to maximise impact. The chapter reinforces the idea that systems change through collaborative communities is critical to ensure that philanthropic interventions result in improved outcomes for millions of people where systems and societies are just and inclusive.