KoinlyticsSei launched in 2023 as a Cosmos SDK chain optimized for trading. Sei V2 (2024) added a full parallel EVM. Two execution environments (CosmWasm + EVM) run on the same consensus layer with shared state.
What parallel EVM means
Traditional EVMs (Ethereum, Arbitrum, Base) execute transactions serially, one after the other. Sei V2 detects which transactions touch different state and runs them concurrently. Optimistic execution rolls back conflicts, retries, and moves on.
Twin-turbo consensus
- Uses Twin-Turbo consensus (evolution of Tendermint).
- ~380ms finality.
- Runs BOTH EVM and CosmWasm on the same block.
Native features
- Native orderbook. Sei has an orderbook module in consensus. DEX apps can plug in.
- Twin turbo throughput. ~12,500 TPS benchmark.
- Interoperable state. EVM contracts read CosmWasm state (and vice versa).
Where it fits
Trading-first apps that want orderbook-class matching with EVM smart contracts. Perp DEXs, spot exchanges, prediction markets.
What to watch
- Parallel EVM is genuinely hard; conflict detection edge cases matter.
- Small validator set (~50) vs Ethereum's 900k+.
- DeFi ecosystem smaller than Ethereum, Solana, or Base.