This comparative review has delved into the intricate dynamics of corporate governance in shaping stakeholders' perceptions and firm valuations, drawing distinctions between developed and developing countries. The findings underscore the significance of robust corporate governance practices in fostering investor confidence, mitigating risks, and driving sustainable long-term value creation. Developed countries, with their well-established legal frameworks, transparent financial reporting, and emphasis on shareholder rights, exhibit governance structures that resonate with global best practices. The resulting impact on firm valuation in these economies is characterized by enhanced investor trust, lower perceived risk, and increased attractiveness to international investors. Conversely, developing countries face unique challenges in instituting effective corporate governance due to variations in legal infrastructure, regulatory frameworks, and institutional capacities. While progress is evident, the impact on stakeholders' firm valuation in these economies is nuanced, reflecting the ongoing efforts to align governance practices with global standards. Stakeholders in developing countries benefit from corporate governance improvements, albeit with a different trajectory and set of challenges. As global markets continue to interconnect, it is imperative for developing countries to bridge the governance gap to attract international investments and foster sustainable economic growth. As we navigate the complexities of global business environments, it is imperative to recognize that the impact of corporate governance extends beyond financial metrics. It is a cornerstone for building trust, promoting ethical practices, and ensuring the long-term resilience of firms.