EY

EY (Ernst & Young) is a global professional services firm that offers blockchain consulting, technology platforms, and advisory services to enterprises across financial services, government, consumer products, healthcare, and other industries. Its blockchain practice focuses on helping organizations adopt public blockchain networks with enterprise-grade privacy and security.

EY provides a suite of blockchain tools under the OpsChain and Blockchain Analyzer product lines. EY Blockchain Analyzer supports audit and reconciliation of digital asset transactions and smart contract vulnerability reviews. OpsChain products cover procurement contract management, supply chain traceability, carbon footprint measurement via the OpsChain ESG tool, and intellectual property notarization. In 2026, EY launched the EY Blockchain Privacy Sandbox, a web-based environment for experimenting with privacy-preserving smart contracts using the open-source Starlight zero-knowledge proof compiler.

EY’s blockchain infrastructure is built primarily on the Ethereum network, including its Nightfall zero-knowledge rollup protocol, which enables private transactions on public Ethereum. The firm also provides digital asset custody guidance, cryptocurrency tax and accounting advisory, and cybersecurity assessments for organizations working with digital assets.