Decentralized storage for the post-cloud world.
Sia is the leading decentralized cloud storage platform. No signups, no servers, no trusted third parties. Sia leverages blockchain technology to create a data storage marketplace that is more robust and more affordable than traditional cloud storage providers.
Sia is reinventing cloud storage. Our technology connects users who need file storage with hosts worldwide offering underutilized hard drive capacity. Blockchain technology secures their data and enables improved economics for users and hosts.
The Sia blockchain allows this marketplace to run without an intermediary. Sia secures storage transactions with smart contracts, creating a more reliable and affordable offering when compared to traditional cloud providers. No one person or organization can censor or deny access to data—not miners, not developers, nor any government. We believe Sia’s distributed, decentralized storage technology is stronger, more secure, more efficient, and more equitable for the entire ecosystem.
Completely Private
Sia encrypts and distributes your files across a decentralized network. You control your private encryption keys and you own your data. No outside company or third party can access or control your files, unlike traditional cloud storage providers.
Far More Affordable
On average, Sia's decentralized cloud storage costs 90% less than incumbent cloud storage providers. Storing 1TB of files on Sia costs about $1-2 per month, compared with $23 on Amazon S3.
Highly Redundant
Sia distributes and stores redundant file segments on nodes across the globe, eliminating any single point of failure and ensuring uptime that rivals traditional cloud storage providers.
Open Source
Sia’s software is completely open source, with contributions from leading software engineers and a thriving community of developers building innovative applications on the Sia API.
Marketplace On Blockchain
Using the Sia blockchain, Sia creates a decentralized storage marketplace in which storage providers compete for your business, which leads to the lowest possible prices. Renters pay using Siacoin, which can also be mined and traded.