Decentralized data storage

Cryptography has unleashed the latent power of the Internet by enabling interactions between mutually-distrusting parties. Sia [sigh-uh] harnesses this power to create a trustless cloud storage marketplace, allowing buyers and sellers to transact directly. No intermediaries, no borders, no vendor lock-in, no spying, no throttling, no walled gardens; it's a return to the Internet we once knew. The future is making a comeback.


Rent space and store your data on the Sia network.


Offer your storage space on the Sia network.


Learn all about how Sia works, why it was created, and the non-profit foundation that maintains it.


The Sia Foundation welcomes contributors from all over the world to come and build on Sia through our Grants program.

Sia is a thriving ecosystem of data storage enthusiasts, open source software, and commercial data storage platforms.


Private and decentralized open-source cloud storage app with encrypted file sharing and media streaming support.
Screenshot of Vup

Content-addressed storage, but fast. Works with Sia and any S3-compatible storage provider.
Screenshot of S5
Sia Satellite

An open-source network service that allows credit card payment for Sia storage.
Screenshot of Sia Satellite
Host Browser

The Sia Central Host Browser lets you explore and filter Sia hosts by a variety of criteria.
Screenshot of Host Browser
Completely Private

Sia encrypts and distributes your files across a decentralized network. Unlike traditional cloud storage providers, you truly own your data: no third party can access your files or prevent you from accessing them.

Highly Redundant

Sia distributes and stores redundant file segments on nodes across the globe, eliminating any single point of failure and achieving uptime and throughput that no centralized provider can compete with.

Far More Affordable

On average, Sia's decentralized cloud storage costs 90% less than incumbent cloud storage providers. Storing 1 TB of files on Sia costs about $1-2 per month, compared with $23 on Amazon S3 - bandwidth is also a magnitude cheaper.

Designed for integration

The Sia software exposes highly modular JSON-speaking endpoints. renterd can even scale horizontally: in stateless mode, it provides raw access to the Sia renter-host protocol, with no UI, no blockchain, and no disk I/O 鈥 perfect for massive renting operations.

R&D leader

The Sia storage network has been securely storing data since 2014. Sia has pioneered the use of many new technologies at scale, such as its use of state channels to process an estimated 20 billion micropayments per day.

Open Source

Sia's software is completely open source, with contributions from leading software engineers. Sia has a thriving community of developers and companies building innovative applications and businesses on top of Sia.

Find developer resources, tutorials, software downloads, and more.

Read the latest from the core team and the ecosystem of developers building technology on top of Sia.

Grants Program Update, September 2023
Sep 21, 2023
The State of Sia, September 2023
Sep 8, 2023
Grants Program Update, August 2023
Aug 23, 2023
The State of Sia, August 2023
Aug 10, 2023
Messari鈥檚 Second Research Report
Aug 9, 2023