Holochain (HOT) is a storage platform focused on cloud storage for distributed applications and an alternative to blockchains. It provides a data structure allowing users to build their own private or public chains. These chains can merge or split from one another. Holochain users each carry a unique digital signature to help prevent unwanted tampering with data. Its chief architect, Arthur Brock is also the founder of Metacurrency Project and was the CTO of Targeted Currencies Network.