1. Public Blockchain: A public blockchain is an open-source, decentralized network that allows anyone to join and participate. Examples include Bitcoin and Ethereum.

2. Private Blockchain: A private blockchain is a centralized network that is restricted to a specific group or organization. It's often used for internal purposes, such as supply chain management.

3. Consortium Blockchain: A consortium blockchain is a hybrid of public and private blockchains, where a group of organizations control the network.

4. Permissioned Blockchain: A permissioned blockchain is a type of blockchain that requires permission to join and participate.

5. Hybrid Blockchain: A hybrid blockchain combines elements of different blockchain types, such as public and private blockchains.

6. Sidechain: A sidechain is a separate blockchain that is connected to a main blockchain, allowing for the transfer of assets between the two.

7. Federated Blockchain: A federated blockchain is a type of blockchain that allows multiple organizations to manage and control the network.

Each type of blockchain has its own advantages and disadvantages, and the choice of which one to use depends on the specific use case and requirements.