Green startups have become an important factor in solving the global sustainability crisis and contribute to the UN Sustainable Development Goals (SDGs). Research focuses on the ways in which environmentally conscious startups generate sustainable development through innovation in areas such as clean energy, waste management and sustainable urban planning. Drawing on existing literature, the study demonstrates the mechanisms through which green startups can support several SDGs at once and identify the conditions in the ecosystem under which their success depends. Through a combination of global trends and the Indian context – home to one of the fastest growing startup ecosystems in the world – the study uses case studies of companies such as ReNew Power and Banyan Nation to provide concrete examples of the impact of green startups on reducing CO2 emissions, increasing resource efficiency and promoting responsible consumption. The results demonstrate that the three most important factors that will determine the success of green startups are policy frameworks, access to financing and raising public awareness, while regulatory barriers and funding shortages continue to be the biggest obstacles to green startup success. The paper also presents hypothetical connections between institutional support, consumer behavior and the success of green startups, as a starting point for future empirical studies. Methodologically, the study uses a descriptive method based on secondary data and examples to summarize the key trends.