While there has been a high level of entrepreneurial activity in Korea since the twentieth century, startup entrepreneurship took off only in the late 1990s and, following a “startup winter” in the 2000s, again since the 2010s. The second and enduring startup boom has been driven by strong government support, shifting cultural attitudes, and growing private investment. Initially dominated by state funding, startup ecosystems in Korea now benefit from increased venture capital and private investment. Young professionals, once focused on stable careers in large Korean conglomerates, are increasingly drawn to startups due to better work-life balance and autonomy. Seoul, with its concentration of talent and capital, leads the startup scene in Korea, particularly in information and communication technology (ICT), boasting numerous unicorns. Furthermore, the city of Daejeon has emerged as a regional hub, focusing on science-based industries like biotech and robotics. However, Korean startups face challenges, including talent retention outside Seoul, limited experienced mentors, and weak global connectivity. While international students and eased immigration policies offer potential for greater diversity, cultural barriers remain. Enhancing openness to foreign talent is crucial for fostering globally competitive startups in Korea.