Sia is a decentralized cloud storage platform that uses a blockchain to facilitate payments. On Sia you can rent storage, get paid to host files, mine Siacon, or contribute to the project.
Existing cloud storage providers are centralized. Costs are high, data is often unencrypted, and each provider typically runs only several large data centers. Sia, by contrast, allows for private, decentralized, distributed cloud storage at a far lower price.
Sia uses a cryptocurrency, Siacoin, to enable decentralized payments via file contracts. All payments on the network happen in Siacoin, which is a critical component of our cryptographic SLAs. Siacoin allows us to do things that would not be possible with Bitcoin or traditional online payments.