Sia is an open-source, blockchain-based, decentralized cloud storage platform. Sia is an innovative cloud storage platform, that utilises smart contracts in order to ensure the encryption transfer of data by eliminating third-party interference. Sia allows anyone to make money by renting out their hard drive in a secure and trustless way, while data integrity is protected through backup systems and cryptography. Anyone can rent out extra space on their PC to the Sia decentralized network and get paid in Siacoin, Sia platform’s cryptocurrency. Consequently, anyone who wants to use Sia storage has to pay Siacoins to a host. BTC/ETC can be exchanged for Siacoin in a few major exchanges, but Shapeshift is the easiest way to obtain your first Siacoin. Sia currently supports desktop wallets on Linux, Mac, and Windows platforms. In the long term, Sia aims to compete with cloud storage platforms like Dropbox, Google Drive, and OneDrive.