Hyperledger is an open-source collaborative effort created to advance cross-industry blockchain technologies. It is hosted by the Linux Foundation and aims to provide a framework for developing blockchain applications and networks that are secure, scalable, and interoperable. The project includes various tools and frameworks, such as Hyperledger Fabric and Hyperledger Sawtooth, which allow businesses to build their own blockchain solutions tailored to their specific needs. By promoting a modular architecture, Hyperledger enables organizations to customize their blockchain implementations while ensuring privacy and performance.