About
Sei is a specialized Layer 1 blockchain optimized specifically for digital asset trading, decentralized finance (DeFi), and high-frequency applications. While many blockchains aim to be general-purpose, Sei was engineered from the ground up to provide the fastest execution environment in the industry. It achieves this through a custom consensus mechanism known as Twin-Turbo Consensus, which includes intelligent block propagation and optimistic block processing, allowing the network to reach transaction finality in approximately 380–400 milliseconds.
The architecture of Sei is designed to handle the "blockchain trilemma" by prioritizing scalability and speed without compromising security. A core feature of the network is its Parallelization Engine, which uses Optimistic Concurrency Control (OCC) to process multiple non-conflicting transactions simultaneously. This significantly increases throughput compared to traditional sequential blockchains. Additionally, Sei features a native, on-chain order matching engine that provides a shared liquidity layer for decentralized exchanges (DEXs), preventing common issues like front-running and ensuring fair price execution for all users.
In 2025 and early 2026, the network reached a major milestone with the Sei V2 and Sei Giga upgrades. These updates transformed Sei into a "Parallel EVM" blockchain, offering full compatibility with Ethereum's tooling (Solidity, MetaMask, Foundry) while maintaining its sub-second speed. This transition has made it a preferred destination for institutional-grade real-world assets (RWAs), with partners like Ondo Finance bringing tokenized Treasury yields to the chain. With the rollout of the Autobahn Consensus in early 2026, Sei aims to push its performance limits even further, targeting over 200,000 transactions per second to support global-scale trading and AI applications.
