Despite the worldwide burden of mental illness and recent interest in global approaches to address this, progress on increasing awareness, lessening stigma, reducing the treatment gap, and improving research and training in mental health has been slow. In 2018, the North East England South Asia Mental health Alliance (NEESAMA) was developed as a collaboration between high-income (global north) and low- to middle-income (global south) countries to address this slow progress. This paper outlines how the joint priority areas for research, training and service delivery were identified across the life course (child and adolescent, adults and older people) between partner organisations spanning Afghanistan, Bangladesh, India, Nepal, Pakistan, Sri Lanka and the UK. It describes the progress to date and proposes a way forward for similar alliances to be forged.