Sei at a glance.
Sei launched on mainnet in August 2023 as a Cosmos SDK chain specialized for high-frequency trading applications. Sei v2, shipped in 2024, added a parallel EVM execution environment alongside CosmWasm, making the chain accessible to Ethereum developers without giving up its performance characteristics.
$65.2M
Value locked in DeFi protocols on Sei. Updated Jun 2, 2026. Source: DefiLlama.
SEI
Used for fees and securing the network. See the live SEI price.
How Sei works.
Sei uses Tendermint Byzantine Fault Tolerant consensus with delegated proof of stake, achieving block finality in under one second. Sei v2 introduced optimistic parallelization: transactions are executed in parallel and only re-run sequentially if a conflict is detected. This increases throughput without requiring developers to mark transactions as independent.
Sei uses Tendermint Byzantine Fault Tolerant consensus with delegated proof of stake, achieving block finality in under one second. Sei v2 introduced optimistic parallelization: transactions are executed in parallel and only re-run sequentially if a conflict is detected. This increases throughput without requiring developers to mark transactions as independent.
Parallel execution
Sei v2 runs transactions simultaneously rather than sequentially, detecting and resolving conflicts automatically. This increases throughput substantially without requiring special transaction annotations from developers.
Twin execution environments
Sei supports both CosmWasm (Cosmos-native smart contracts in Rust) and a full EVM (Solidity contracts via Sei v2). Both environments can interact, and the same underlying state is shared.
Built-in order book
Sei has a native on-chain order book primitive, reducing the overhead for DeFi protocols that need matching logic and enabling lower latency for trade execution compared to custom implementations.
Sub-second finality
Tendermint provides single-slot finality, meaning transactions are final within the same block they are included in. There is no probabilistic waiting period as with longest-chain consensus.
What Sei is used for.
Sei's ecosystem spans trading-focused DeFi (perps, DEXs, order-book protocols), NFT marketplaces that benefit from fast confirmation, and a growing set of EVM applications drawn in by Sei v2 compatibility.
Perpetuals and derivatives
On-chain perpetual futures and options protocols deploy on Sei to take advantage of sub-second finality and the built-in order book primitive.
High-frequency DEX trading
DEXs on Sei offer faster settlement than chains with longer block times, improving the experience for active traders.
NFT minting and trading
Sub-second block times reduce the waiting experience for NFT mints and marketplace purchases, an improvement over chains where a block takes 10-15 seconds.
EVM migration
Teams with existing Ethereum or EVM contracts can deploy on Sei v2 to give users faster finality and lower fees while reusing their existing code.
Hold, swap and spend SEI.
Sei is integrated in the Zypto App. Hold SEI in self-custody, swap it to any supported asset, and use it across Zypto’s features.
Be the reason Sei ships next.
Sei isn’t in the Zypto App yet. Post the request to your followers, chains with the most demand get prioritised.
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