Flow vs Sei

Flow features a multi‑role architecture—collection, consensus, execution and verification nodes—that splits tasks for high throughput while keeping deterministic execution. Cadence, its resource‑oriented language, powers popular NFT projects like NBA Top Shot and Gaia marketplace. The 2024 ‘Spork’ upgrade introduced FCL walletless onboarding and bridged USDC from Ethereum to boost DeFi liquidity.

Sei is a parallelised Cosmos‑SDK Layer‑1 optimized for order‑book exchanges, using Twin‑Turbo consensus to reach 300–400 ms finality. Its built‑in matching engine lets dApps compose on a shared liquidity layer, and fee markets are denominated in SEI with bulk‑order discounts. The ‘V2’ upgrade adds EVM compatibility via SeiDB and WASM contracts side‑by‑side.