DxChain is the world’s first decentralized big data and machine learning network powered by a computing-centric blockchain. In other words, DxChain is a public chain, aims to design a platform to solve computation of big data in a decentralized environment. For simplicity, we could use DxChain to store and trade big data, so as to make data more valuable with the computation.
The SALT platform is meant to facilitate getting a loan, where the company holds your cryptocoins as collateral while you don't pay back the loan.