Hyperliquid is an order book perpetual futures DEX. Hyperliquid does everything the best CEXs do, but on-chain.
The DEX runs on the Hyperliquid L1, a purpose built blockchain using the Tendermint SDK that is performant enough to operate the whole exchange – every order, cancel, trade, and liquidation happens transparently on-chain with block latency <1 second. The chain currently supports 20k orders / second.