The rise of ESG investing, projected to exceed $50 trillion by 2025, highlights the growing demand for corporate sustainability. However, Saudi Arabia’s reliance on voluntary ESG reporting undermines accountability and progress toward Vision 2030. This paper argues that blockchain technology can bridge these gaps by ensuring transparency, accountability, and stakeholder trust in ESG data. Vision 2030’s success depends on aligning corporate practices with sustainability and governance principles. Mandatory, blockchain-enabled ESG reporting is essential to achieving these goals, enhancing corporate accountability, and positioning Saudi Arabia as a regional leader in sustainability. This study examines Saudi Arabia’s legal framework for ESG disclosures, identifies the shortcomings of voluntary reporting, and proposes a blockchain-based mandatory ESG reporting system. It explores legal, regulatory, and practical implications while addressing challenges like costs and technical barriers. Ultimately, it advocates for a transparent, accountable, and sustainable business environment, reinforcing blockchain’s transformative role in Vision 2030.