Hyperledger is an open-source collaborative blockchain framework hosted by the Linux Foundation, designed for building enterprise-grade, permissioned distributed ledger solutions not public cryptocurrencies. Unlike public chains such as Litecoin, which operate as open, decentralized payment networks, Hyperledger provides modular tools and frameworks (like Fabric, Sawtooth, and Iroha) for private consortium networks where participants are vetted and permissions are enforced.