Blockstack

Blockstack is an open-source and developer-friendly network for building decentralized apps and smart contracts. Blockstack inherits Bitcoin's security through Proof of Transfer, enables you to write secure smart contracts with Clarity, and brings it all together in one decentralized network maintained by developers from all over the world. Blockstack PBC and developers from throughout the Stacks ecosystem are contributing to development of the Stacks 2.0 mainnet software which will provide the most advanced secure app developer tools and smart contracts on Bitcoin.