Polygon has announced the launch of CDK Besu, a new configuration option in its Open Money Stack that allows developers to launch private chains or connect existing Hyperledger Besu networks directly to AggLayer. The rollout was made public on October 19, 2026, and represents a strategic expansion of Polygon’s Chain Development Kit ecosystem.
According to Polygon, the integration is intended for banks and enterprise consortiums that already use Hyperledger Besu because of its open-source design and compliance-friendly architecture. Previous private networks were often isolated and required multi-signature mechanisms or external validation committees for cross-platform transfers. CDK Besu changes this by embedding bridge contracts directly into a network’s genesis block, enabling interoperability from the first block.
“Part of building the Open Money Stack is fulfilling the demand from our clients. This is why we are launching Polygon CDK Besu stack which enables us to launch Besu chains and connect existing ones using AggLayer,” Polygon contributor Aishwary wrote on X.
The new architecture keeps internal transactions and private data on the institution’s own servers, while only essential bridge activity is transmitted to AggLayer and settled on Ethereum mainnet. Interconnected transfers are validated using zero-knowledge proofs, and security relies on pessimistic proofs produced by the Succinct prover network, ensuring no connected chain can withdraw more than it originally deposited. This limits systemic risk and removes reliance on centralized validation committees.
Operationally, the stack supports QBFT validator nodes across multiple entities and requires structured consensus among registered participants before certificates are approved for AggLayer. Deployment tooling and operational manuals are available for Ethereum mainnet production use, with dedicated testnet environments for institutions evaluating the integration.
