What is Sui?

Sui is a Layer 1 blockchain developed by Mysten Labs — a team of former Meta (Facebook) engineers who worked on the Diem blockchain and the Move programming language — with mainnet launching in May 2023. Sui uses an object-centric data model written in Sui Move, a variant of the Move language, where assets are represented as distinct on-chain objects with defined ownership rather than as entries in a shared global state. This model allows simple transactions that only involve single-owner objects to bypass consensus entirely via a fastpath called Byzantine Consistent Broadcast, enabling theoretical sub-second finality for the majority of user transactions.

Sui's core architectural innovation is its distinction between owned and shared objects. Transactions touching only owned objects (a user sending a coin or transferring an NFT) can be processed in parallel without going through full consensus, because no ordering conflict is possible with fully owned state. Transactions touching shared objects (like a DEX pool) still require Narwhal-Bullshark DAG-based BFT consensus, which Sui processes in parallel to owned-object transactions. This design gives Sui a throughput ceiling significantly higher than monolithic chains for applications that can be designed around owned objects. Sui also supports zkLogin, which allows users to authenticate using OAuth providers (Google, Apple) to generate transaction signatures without exposing a seed phrase.

Sui's primary risks are those common to new L1s: its Mysten Labs origin means a large portion of SUI tokens are held by the founding team and investors under vesting schedules, creating potential sell pressure as lockups expire. The Sui Foundation controls a significant treasury. Sui competes directly with Aptos (also Move-based, also ex-Meta team) for developer mindshare in the Move ecosystem, and both chains compete against the much larger Solana ecosystem for high-performance non-EVM applications. The Move language, while designed for safer asset handling, has a smaller developer community and fewer existing libraries than Solidity, creating a steeper onboarding curve for teams migrating from EVM chains.

Reviewed by the 2Bitcoins Editorial Team · Updated June 2026. Not financial advice.