Circle has begun testing a new privacy-enhanced version of USDC on Aleo, a Layer 1 network built around zero-knowledge cryptography. The pilot introduces USDCx, a wrapped stablecoin designed to offer stronger transactional privacy without sacrificing regulatory compliance.
Team Circle
The asset uses Aleo’s zkSNARK-based framework to encrypt network activity. Instead of providing full anonymity, USDCx aims for what Circle calls “bank-level privacy,” which keeps an auditable compliance trail. Circle says this approach supports a range of business needs such as global payroll, e-commerce, humanitarian aid distribution, and cross-border remittances.
Kash Razzaghi, Circle's chief commercial officer, said the pilot brings together high-quality reserves with on-chain transparency and privacy in a way that can help enterprises scale stablecoin use worldwide.
The initiative comes as more crypto projects explore “pragmatic privacy” — technology that protects user activity while filtering out illicit behavior. Protocols like Railgun and Privacy Pools are experimenting with new mixer-style designs that allow compliant screening, and long-standing privacy networks are shifting toward more regulator-friendly models.
USDCx currently runs on an Aleo testnet and is fully backed by traditional USDC held in an on-chain xReserve. This reserve setup relies on Circle’s cross-chain minting and transfer systems and avoids external third-party bridges. Aleo noted that once USDCx moves to other blockchains, it will not inherit Aleo’s zero-knowledge privacy features.
Aleo’s role in this pilot reflects its deep roots in academic cryptography. The project grew out of early research from several Zcash co-founders and university experts who explored how to bring private smart contracts to public networks. Aleo launched its mainnet in 2024 and previously raised a $200 million Series B round backed by firms including SoftBank Vision Fund 2, Kora Management, a16z, Tiger Global, and Samsung Next.
