Sui, positioned as a rival to Ethereum and Solana, has stood out as one of the layer-1 blockchains known for high transaction speed and low fees since its 2023 launch. Developed by Mysten Labs, a company founded by former members of Meta’s canceled Diem project, the network has become an attractive infrastructure option especially for DeFi and blockchain-based gaming applications. However, on Thursday, Sui’s mainnet went down and transactions came to a halt.
Sui Network Comes to a Halt
The mainnet of Sui, the layer-1 blockchain developed by Mysten Labs, went down on Thursday. The network was unable to produce new blocks for nearly two hours, and all transactions were suspended during that period. The Sui team issued an official statement on X regarding the outage: “Sui Mainnet is currently experiencing a network pause. The Sui Core team is actively working on a resolution. Please note that transactions may be paused at this time.”
Data from block explorer SuiScan confirmed that the network had failed to produce new blocks for an extended period. Updates on the status page stated that the issue was identified at 19:36 and that the fix had reached the implementation stage.
This Is Not the First Time
For Sui, this is not an unfamiliar picture. In fact, it marks the network’s third notable outage. The previous two incidents occurred in November 2024 and January 2026. During the January outage, developers also spent hours bringing the network back online.
Launched in 2023, Sui is one of the new-generation layer-1 networks positioned as a competitor to Ethereum and Solana. High transaction speed and low fees are among its core selling points. The network was developed by a team that split off from Meta’s canceled Diem stablecoin project.
After news of the outage spread, the network’s native token SUI fell by 8% over the past 24 hours. However, it is difficult to say whether this decline was directly caused by the outage or whether it coincided with broader market conditions, as crypto markets were also showing a mixed performance during the same period. At the moment, there is no information suggesting that user funds have been affected.
Blockchain outages become an especially critical issue when the networks involved provide infrastructure for DeFi and gaming applications. If a protocol defines itself as high-performance infrastructure, a network halt lasting for hours clearly conflicts with that image. Developers and investors have a strong reason to monitor such incidents closely, as ecosystem reliability is a decisive factor for institutional integrations and large-scale applications.
The Sui team said it will continue to share further updates as the investigation progresses.
