Sui, launched 2023 by Mysten Labs ex-Meta engineers, is a high-throughput object-centric Layer-1 using Delegated Proof-of-Stake and the Move language. Narwhal/Bullshark mempool yields 297,000 TPS in test-net; checkpoint consensus finalises within < 450 ms. SUI token pays gas, secures validators and grants on-chain governance. Total supply 10 billion; 3.45 billion circulating.