Fluree is an immutable, time-ordered ledger. Each block is an atomic update that is cryptographically signed to prevent tampering and linked to the previous block in the chain. You can run Fluree privately or as part of a federated network.
A private Fluree is a group of ledgers run on a single server, hosted either by you or by Fluree for you.
A federated Fluree is a group of ledgers shared by a network. In addition to all the features of a private instance of Fluree, running Fluree federated provides additional data integrity. With a federated Fluree, the network uses an agreed-upon consensus algorithm to reach a shared state.