Estonia, after a series of severe cyberattacks in 2007, integrated blockchain technology into its e-governance system, bolstering its cybersecurity infrastructure and becoming a global model of digital society innovation. Today, Estonia is one of the world's most digitally integrated countries, with 99% of its public services digitized, reportedly saving over 1,400 years of working time and about 2% of its GDP annually. This case study provides a comprehensive analysis of Estonia's digital transformation, evaluating the endeavor from multiple perspectives, encompassing technology, governance, regulatory frameworks, stakeholder involvement, and the underlying values driving the transformation. It aims to derive lessons for other countries considering their own digital transformations.