The Catalyst Changemakers Ecosystem (CCE) 3.0 is an initiative by the GoTo Impact Foundation (GIF) designed to drive collaborative systems change and foster local innovations addressing environmental and social challenges across Indonesia. Catalyst Changemakers Lab, the most fundamental stage of Catalyst Changemakers Ecosystem, was designed by Instellar Impact and GoTo Impact Foundation to drive innovations through training and mentoring. Through a series of structured activities, including selection, matchmaking, lab sessions, and graduation, participants receive tools, resources, and collaboration opportunities to turn their ideas into real-world impact.