Payjoin

Tools & Data·Singapore·payjoin.org

About Payjoin

Payjoin is an open-source Bitcoin protocol and developer toolkit that facilitates collaborative transactions in which both sender and receiver provide transaction inputs. This structure breaks the common-input-ownership heuristic, a method used by blockchain analysis tools to infer transaction relationships. The protocol reduces on-chain transaction fees through input batching and increases network throughput. Payjoin supports Lightning Network channel funding within a single transaction. The project provides a developer kit and is integrated into multiple Bitcoin wallets and payment processors, including BTCPay Server, Sparrow Wallet, BlueWallet, Cake Wallet, Wasabi Wallet, and Bull Bitcoin Wallet. The initiative operates as a community-driven, open-source project funded through donations.

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last updated 25 Jul 2026

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