Horizen

The core feature of the Horizen blockchain is privacy. Since its launch as ZenCash, the network has used zero-knowledge proofs to make its ZEN currency untraceable and unwatchable between its privacy-conscious users. It also believes any interaction between users should be private. So the company is building privacy solutions for smart contracts–with the intent of being a decentralized platform for private messaging, publishing, and decentralized application (dapp) development.