The Dutch Good Growth Fund (DGGF), in collaboration with iGravity, is designing a multi-donor initiative to strengthen Entrepreneur Support Organizations (ESOs) in emerging markets. This ESO system assessment report seeks to identify persistent constraints that hinder the sustainability of the ESO systems and pinpoint specific leverage points to address these constraints. Ultimately, the goal of the report is to connect like-minded ESO partners and ESOs to collaborate and move the sector toward a more sustainable future.