Sui (SUI): how it works, supply and reviews
In short
- Type
- Layer-1 smart contract platform with an asset-oriented (object) model
- Maximum supply
- 10,000,000,000 SUI
- Risks and caveats
- Most of the SUI supply was not circulating at launch and is still being released; the pace depends on the Sui Foundation.
- Checked
- 31 October 2026
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Key facts
- Ticker
- SUI
- Official site
- sui.io
Key facts checked on 31 October 2026 against official sources.
What is Sui
Sui is a layer-1 smart contract blockchain built around assets (objects) and the Move programming language. SUI is its native token, used for gas fees, staking with validators and on-chain governance votes.
Network and consensus
| Parameter | Details |
|---|---|
| Type | Layer-1 smart contract platform with an asset-oriented (object) model |
| Consensus | Delegated proof of stake; validators run the DAG-based Mysticeti consensus protocol |
| Staking | SUI holders delegate stake to validators; stake changes take effect at the next epoch |
| Programming language | Move |
| Launched | Mainnet launched on 3 May 2023 with over 100 validators |
Supply and issuance
| Parameter | Details |
|---|---|
| Maximum supply | 10,000,000,000 SUI |
| Initial distribution | About 5% of SUI circulated at mainnet launch; the rest is released on a schedule |
| Staking rewards | Rewards come from computation fees plus temporary stake subsidies that end as circulation approaches the cap |
| Storage fund | Storage fees go into a storage fund whose staking rewards pay validators for storing past data |
On 2026-10: 4,118,270,448 SUI in circulation, 10,000,000,000 SUI in total (source: Sui circulation API linked from sui.io/token-schedule (month of October 2026)).
What SUI is used for
- Paying gas fees for transactions
- Staking with validators in the proof-of-stake system
- Voting on governance matters such as protocol upgrades
Who develops and governs Sui
- Developer
- Mysten Labs wrote the original code and holds a treasury share of SUI
- Foundation
- The Sui Foundation, an independent organisation, manages the Community Reserve (grants, delegation, research)
- Governance
- SUI holders and stakers take part in on-chain votes on protocol upgrades
- Open source
- Yes; the Sui code is published under the Apache License 2.0
History
| Date | Event |
|---|---|
| 3 May 2023 | Sui Mainnet launches for public use with over 100 validators. |
| 15 July 2023 | The network processes over 65 million transactions in a single day. |
| December 2023 | Sui passes nine million active accounts. |
Security and audits
- The Sui Foundation runs a bug bounty with HackenProof; critical protocol bugs pay $100,000 to $500,000.
- Sui works with outside firms for audits and formal verification of Move code, including Asymptotic and Certora.
Risks and caveats
- Most of the SUI supply was not circulating at launch and is still being released; the pace depends on the Sui Foundation.
- Mysten Labs, the original developer, received a treasury share of the token supply.
- Staking rewards are partly funded by temporary subsidies that shrink over time.
Official links
- Website: sui.io
- Docs: docs.sui.io
- Source code: github.com/MystenLabs/sui
- Blog: sui.io/blog
- Token schedule: www.sui.io/token-schedule
Questions and answers
What is Sui?
Sui is a layer-1 smart contract blockchain with an asset-oriented model and the Move language. SUI is its native token.
Who created Sui?
Mysten Labs wrote the original code; the independent Sui Foundation supports the network and manages the Community Reserve.
What is the maximum supply of SUI?
10 billion SUI. In October 2026 about 4.12 billion SUI, or 41%, was in circulation.
How does Sui reach consensus?
Delegated proof of stake: SUI holders delegate to validators, which run the DAG-based Mysticeti consensus protocol.
When did Sui mainnet launch?
Sui Mainnet launched publicly on 3 May 2023.
Sources
- Sui — home page
- Sui — SUI token supply and schedule
- Sui — Security
- Sui Docs — Tokenomics
- Sui Docs — Consensus
- Sui blog — Mainnet anniversary (3 May 2024)
- Sui README (GitHub)
- Sui SECURITY.md (GitHub)
- Sui LICENSE (GitHub)
- Sui circulation API
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