Roadmap

Estimated Completion: Q2 2026

S3 is the most widely adopted data transfer protocol available today. Improving support will allow new users to plug Sia into their existing S3-based workflows and tools with minimal migration friction. Partial support is available now. Full support and tool validation is an ongoing effort.

Completed: Q1 2026

Users must be able to use Sia without setting up complex software or acquiring Siacoins. They should be able to start interacting with Sia right after signing up for a free account.

We launched Sia Storage in March 2026, enabling any user to access Sia's decentralized storage network without setting up any software.

Completed: Q1 2026

Sia's current development process involves navigating intricate software infrastructure, blockchain syncing, obtaining Siacoin, and setting up reverse proxies. To streamline this for developers, we will introduce a free service and SDK to empower developers to quickly begin building on Sia, eliminating initial hurdles.

We have launched new SDKs currently available in Python, Javascript, Rust, Go, Swift, Kotlin enabling developers to build from any language directly on Sia.

Completed: Q1 2026

By leveraging the latest SDK and RHP4 architecture, applications on Sia can directly interact with the storage network, bypassing centralized infrastructure. This shift eliminates reliance on central bottlenecks, reduces latency and significantly improves decentralization. Application developers no longer need to worry about their infrastructure bottlenecking their users.

We launched Sia Storage in March 2026, enabling any user to access Sia's decentralized storage network without setting up any software.

Completed: Q1 2026

Using WebTransport, Sia will allow direct access to hosts within browsers, eliminating the need for intermediaries or additional software downloads. This feature enables users to seamlessly retrieve data stored on Sia.

Data from Sia can now be streamed in Chrome, Brave, Firefox, and iOS Safari https://video-demo.sia.dev

Completed: Q4 2025

A complete overhaul of Sia’s core consensus; transitioning from a large UTXO database to a compact UTreeXO accumulator. With UTreeXO, the entire history only takes up a couple of megabytes on disk. Perfect for low-resource devices.

Support for chain pruning is now available in hostd, renterd, and walletd.

Completed: Q4 2025

With the transition to UTreeXO, nodes can securely synchronize using a few checkpoints rather than validating every block in the chain. Blocks can be validated and checked in parallel rather than serially. That allows for fresh nodes to get started almost instantaneously and finish syncing in the background rather than having to sync the whole chain before getting started.

Support for instant sync is now available in hostd and renterd. New wallets can now skip through chain history while still fully validating using UTreeXO.

Completed: Q2 2025

Siacoin is now tradable on Komodo DEX

Completed: Q2 2025

RHP4 is the next iteration of the renter-host communication layer. It removes inefficiencies in previous protocols and focuses on providing low-latency access to stored data, improving parallelism, and reducing protocol overhead.

Completed: Q2 2025

In addition to being more efficient, RHP4 separates the concept of uploading data and storing data in a contract. This allows for uploads without requiring a contract, allowing for parallel uploads and outsourcing of contract management and data repairs  to third parties.  

Completed: Q2 2025

V2 contracts will allow for unlocking unused host and renter funds immediately upon renewal and for the funding of a contract and by rolling over existing funds from the renewed contract. This results in much more efficient use of both renter and host funds.